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- rajyogsteel@outlook.com
- Mumbai, Maharashtra, India
Stainless Steel is a group of heat and corrosion resisting steels. They have in general a higher resistance to corrosion in some definite environment, as well as a higher resistance to scaling at high temperature.
Stainless Steel are iron-based alloys containing a minimum of 10.5% Chromium with or without other alloying elements. Based on the alloy content and the micro structure, stainless steels are classified into three major categories viz, Austenitic, Ferritic, and Martensitic.
This category of stainless steel contains 16 to 26% Chromium and 6 to22% Nickel. They are non- magnetic in annealed condition and have excellent corrosion resistance. They are not hardenable by heat treatment. However, they can develop high strength on cold working. They have excellent weldability, formability, hygiene factor and cryogenic properties. . On cold working they exhibit different degrees of magnetism. They are identified in the AISI 300 series.
This category of stainless steel contains 10.5 to 30% chromium without any Nickel. They are Ferro magnetic in nature and generally not hardenable by heat treatment. These steels possess good resistance to stress corrosion cracking and moderate weldability &formability. They are identified in the AISI 400 series.
This group contains 11 to 14% chromium without any nickel, but with a higher carbon content compared to the Austenitic and ferritic stainless steels. They are ferro-magnetic in nature and are hardenable by heat treatment. They possess moderate corrosion resistance and are identified in the AISI 400 series.
Rajyog Steel produces a wide range of cold rolled coils and cut lengths (sheets) in austenitic, ferritic and martensitic grades of stainless steel conforming to ASTM and various other specifications in a variety of sizes and finishes.
| Product Specifications | ||
| Coil | Sizes (mm) | |
| Dimension | Range (mm) | Standard sizes (mm) |
| Thickness | 0.3 to 6.00 | 0.30, 0.40, 0.50, 0.55, 0.63, 0.70, 0.80,0.90,1.00,1.25,1.50,1.60, 2.00,2.50,2.80, 3.00, 3.15, 3.60, 4.00,5.00 6.00 |
| Width (mm) | 50 to 1250 | 1000, 1250 |
| Inner Diameter | 406, 508 or 610 | |
| Sheet / Plate | ||
| Dimension | Range (mm) | Standard sizes (mm) |
| Thickness | 0.5 to 6.00 | 0.50, 0.55, 0.63, 0.70, 0.80, 0.90, 1.00, 1.25, 1.50, 1.60 2.00, 2.50, 2.80, 3.00, 3.15 3.60, 4.00, 5.00, 6.00 |
| Width (mm) | 600 to 1250, 1000, 1250 | |
| Length (mm) | 500 to 4000 | 1500, 2000, 2500, 3000, 3500, 4000 |
– Supply of 0.1 and 0.2 mm thickness by mutual discussion.
– Supply of Non-standard and higher thickness by mutual discussion.
– Hot rolled, annealed, shot blasted and pickled stainless steel (No.1 finish) coils sheets/ plates are available in thicknesses of 2.00- 8.00 mm.
| Finish | Description | Remarks |
| No:1 | Hot rolled, annealed, shot blasted and pickled | Used where surface finish is not critical |
| CR | Work hardened | used where higher hardness & strength is required |
| 2D | Cold rolled, annealed and pickled | Uniform dull finish for applications |
| 2B | Cold rolled, annealed, pickled & skinpassed | Bright smooth finish for general applications |
| No.3. | Cold rolled, annealed, pickled & polished with 100 to 120 grit abrasive | For decorative applications |
| No.4. | Cold rolled, annealed, pickled & polished with 120 to 150 grit abrasive | For decorative applications |
| No.8. | Cold rolled, annealed, pickled, skin passed & polished | As press plates, electronic equipment frames and decorative applications |
| Special Finishes | Cold rolled with special rolls, annealed, pickled and skin passed. | For decorative applications. |
| Dull Finish | Cold rolled, annealed and skin passed with 24 grit abrasive. | For decorative applications. |
Coils and sheets can be supplied with surface protection film. Please contact for more information
Tolerances on Thickness – (Unit : ‘mm’)
| Normal Tolerance (Code “N”) – CRSS | Precision Tolerance (Code ‘P’) | Thickness Tolerance for No.1 | |||||
| Thickness Range | Permitted Tol. on Thick for specified width | Thickness range | Permitted Tol. on thick (Total) | Thickness | Permitted Tol. (±) on thick | ||
| ≤1000 | >1000 to ≤1275 | 0.30 | 0.040 | 2.00 | 0.18 | ||
| ≤0.30 | ± 0.030 | – | > 0.30 to £ 0.50 | 0.060 | 2.25 | 0.20 | |
| >0.30 to ≤0.40 | ± 0.040 | ± 0.04 | > 0.50 to £ 0.80 | 0.080 | 2.50 | 0.23 | |
| >0.40 to ≤0.50 | ± 0.045 | ± 0.050 | > 0.80 to £ 1.00 | 0.090 | 3.00 | 0.25 | |
| >0.50 to ≤0.80 | ± 0.050 | ± 0.050 | > 1.00 to £ 1.50 | 0.100 | 3.50 | 0.30 | |
| >0.80 to ≤1.00 | ± 0.055 | ± 0.060 | > 1.50 to £ 2.00 | 0.120 | 5.00 | -0.25, + 0.47 | |
| >1.00 to ≤1.50 | ± 0.080 | ± 0.080 | > 2.00 to £ 2.50 | 0.160 | 6.00 | -0.25, + 0.51 | |
| >1.50 to ≤2.00 | ± 0.10 | ± 0.10 | > 2.50 to £ 3.00 | 0.200 | 8.00 | -0.25, + 0.75 | |
| >2.00 to ≤2.5 | ± 0.10 | ± 0.11 | > 3.00 to £ 4.00 | 0.240 | |||
| >2.50 to ≤3.00 | ± 0.13 | ± 0.13 | Close Tolerance (Code ‘C’) | ||||
| >3.00 to ≤4.00 | ± 0.17 | ± 0.17 | Any thickness closer than precision tolerance agreed by mutual discussion | ||||
| >4.00 to ≤5.00 | ± 0.17 | ± 0.17 | |||||
| >5.00 to ≤6.00 | ± 0.17 | ± 0.20 | Normal Tol. for ME – ≥1000 : -0,+30 / <1000 : -0,+25 | ||||
Tolerances on Width – (Unit : ‘mm’)
| |||||||||||||
Normal Tolerance for sheets and coils (Code ‘N’) – CRSS Trimmed Edge | |||||||||||||
THICKNESS | Permitted Tolerance on Width for specified width | ||||||||||||
≤250 | >250 to ≤600 | >600 to ≤1000 | >1000 to ≤1250 | ||||||||||
≤1.00 | +0.50,-0 | +0.70,-0 | +1.50,-0 | +2.00,-0 | |||||||||
>1.0 to ≤1.50 | +0.70,-0 | +1.00,-0 | +1.50,-0 | +2.00,-0 | |||||||||
>1.5 to ≤2.50 | +1.00,-0 | +1.20,-0 | +2.00,-0 | +2.50,-0 | |||||||||
>2.50 to ≤3.50 | +1.20,-0 | +1.50,-0 | +3.00,-0 | +3.00,-0 | |||||||||
>3.50 to ≤6.00 | +2.00,-0 | +2.00,-0 | +4.00,-0 | +4.00,-0 | |||||||||
Precision Tolerance on width (Trimmed Edge) CRSS coils (Code ‘P’). Any width stricter than normal tolerance agreed by mutual discussion. | |||||||||||||
Normal Tolerance for sheets and coils (Code ‘N’) – No.1 Trimmed Edge | Tolerance on length-(Unit : ‘mm’) | ||||||||||||
Thick | Width | Permitted Tol. width | Normal Tolerance (Code ‘N’) – CRSS | Normal Tolerance (Code ‘N’) – No.1 | |||||||||
≤5.00 | <1200 | +2,-0 | Specified Length | Permitted Tol. on length | Specified Length | Permitted Tol. on length | |||||||
≤5.00 | ≥1200 | +6,-0 | |||||||||||
>5.00 to ≤6.00 | <1200 | +4,-0 | ≤2000 | +5,-0 | < 3000 | +12 , – 0 | |||||||
>5.00 to ≤6.00 | ≥1200 | +9,-0 | >2000 | +0.0025 x L, -0 | ³ 3000 | +0.005 x L, – 0 | |||||||
Tolerance on Flatness –(Unit : ‘mm’) | |||||||||||||
Tolerance for CRSS | 10 mm max for all thicknesses and widths | ||||||||||||
Tolerance for No.1 | |||||||||||||
Specified Thickness (mm) | Specified width(mm) | Permitted Tolerance(mm) on flatness | |||||||||||
<5.0 | < 900 | 13 | |||||||||||
<5.0 | 900-1275 | 19 | |||||||||||
≥5.0 | < 1275 | 23 | |||||||||||
Grade | % Chemical Composition (Ladle) | ||||||||
C (max) | Si (max) | Mn | Cr | Ni | P (max) | S (max) | N (max) | Other Elements | |
301 | 0.15 | 1.00 | 2.00 max | 16.00–18.00 | 6.00-8.00 | 0.045 | 0.030 | 0.1 | – |
301L | 0.03 | 1.00 | 2.00 max | 16.00–18.00 | 6.00-8.00 | 0.045 | 0.030 | 0.2 | – |
304 | 0.07 | 0.70 | 2.00 max | 17.5- 19.5 | 8.00-10.50 | 0.045 | 0.030 | 0.1 | – |
304L | 0.03 | 0.75 | 2.00 max | 17.5- 19.5 | 8.00-12.00 | 0.045 | 0.030 | 0.1 | – |
310S | 0.08 | 1.50 | 2.00 max | 24.00–26.00 | 19.00-22.0 | 0.045 | 0.030 | – | – |
316 | 0.08 | 0.75 | 2.00 max | 16.00–18.00 | 10.00-14.00 | 0.045 | 0.030 | 0.1 | Mo 2.0-3.0 |
316L | 0.03 | 0.75 | 2.00 max | 16.00–18.00 | 10.00-14.00 | 0.045 | 0.030 | 0.1 | Mo 2.0-3.0 |
321 | 0.08 | 0.75 | 2.00 max | 17.00–19.00 | 9.00-12.00 | 0.045 | 0.030 | 0.1 | Ti=5x(C+N) Min/0.70 max |
SSLNQ | 0.12 | 0.75 | 10.5 max | 14.5-15.5 | 0.30-1.00 | 0.075 | 0.015 | 0.20 | Cu 2.0 max. |
SSLN1 | 0.12 | 0.75 | 10.0 max | 14.00–16.00 | 0.90-1.70 | 0.075 | 0.030 | 0.20 | Cu 2.2 max |
SSLN4 | 0.1 | 0.75 | 8.0 max | 14.00–17.00 | 3.80-4.70 | 0.070 | 0.030 | 0.15 | Cu 2.2 max |
204Cu | 0.15 | 1.00 | 6.50-9.00 | 15.5 – 17.5 | 1.5–3.5 | 0.060 | 0.030 | 0.25 | Cu 2.0–4.0 |
409 | 0.03 | 1.00 | 1.00 max | 10.50–11.70 | 0.50 max | 0.04 | 0.02 | 0.03 | Ti=6x(C+N) min / 0.50 max Nb 0.17 max |
SS 409M | 0.03 | 1.00 | 0.5-1.5 | 10.80-12.50 | 1.5 max | 0.040 | 0.030 | 0.03 | – |
410S | 0.08 | 1.00 | 1.00 max | 11.50–13.50 | 0.6 max | 0.040 | 0.030 | – | – |
420 | 0.15 min | 1.00 | 1.00 max | 12.00–14.00 | 0.75 max | 0.040 | 0.030 | – | Mo 0.5 max |
430 | 0.12 | 1.00 | 1.00 max | 16.00–18.00 | 0.75 max | 0.040 | 0.030 | – | – |
439 | 0.03 | 1.00 | 1.00 max | 17.00-19.00 | 0.5 max | 0.040 | 0.030 | 0.03 | Ti[0.2+4 (C+N)] Min /1.1 max Al 0.15 max |
Grade | U.T.S. N/mm2 Min | 0.2% Proof Stress / YS N/mm2 Min | % El (GL = 50 mm) Min | Hardness HRB max | Cold Bend |
301 | 515 | 205 | 40 | 95 | Not required |
301L | 550 | 220 | 45 | 100 | Not required |
304 | 515 | 205 | 40 | 92 | Not required |
304L | 485 | 170 | 40 | 92 | Not required |
310S | 515 | 205 | 40 | 95 | Not required |
316 | 515 | 205 | 40 | 95 | Not required |
316L | 485 | 170 | 40 | 95 | Not required |
321 | 515 | 205 | 40 | 95 | Not required |
204 Cu | 650 | 310 | 40 | – | Not required |
SSLN4 | 600 | 275 | 40 | 96 | Not required |
409 | 380 | 170 | 20 | 88 | 180° 1 t |
SS409M | 450 | 275 | 22 | 92 | 180° 1 t |
410S | 415 | 205 | 22* | 89 | 180° 1 t |
420 | 690 max | – | 15 | 96 | Not required |
430 | 450 | 205 | 22 * | 89 | 180° 1 t |
439 | 415 | 205 | 22 | 89 | 180° 1 t |
* 20% Min for Thickness less than 1.27 mm | |||||
Details | 301 | 304/304L | 316/316L | 310S | 430 | 409 |
Density (gm/cm3) | 7.9 | 7.9 | 8.0 | 7.9 | 7.7 | 7.7 |
Modules of Elasticity (kg /mm2) | 19700 | 19700 | 19700 | 20300 | 20300 | 20300 |
Specific Heat Capacity Cal/gm/0C | 0.12 | 0.12 | 0.12 | 0.12 | 0.11 | 0.11 |
Thermal conductivity (Cal/cm2/Sec/0C/cm at 1000c | 0.039 | 0.039 | 0.037 | 0.033 | 0.0625 | 0.0595 |
Specific Electrical Resistance (u.cm3) | 72 | 72 | 74 | 80 | 60 | 57 |
Coefficient of thermal expansion (0Cx10-6, 0-500 0C) | 19.8 | 18.4 | 16.0 | 16.9 | 11.34 | 11.52 |
Melting Range (0C) | 1400- 1420 | 1400- 1455 | 1370- 1400 | 1400- 1455 | 1430- 1510 | 1430- 1510 |
* For Guidance Only
GRADE | IS INDIA | AISI USA | DIN GERMANY | AFNOR FRANCE | JIS JAPAN | BS BRITIAN | SIS SWEDEN | UNS | UNI ITALY |
SS 301 | X10 Cr 17Ni 7 | 301 | 1.4310 | Z 12 CN 17-08 | SUS 301 | 301 S 21 | 142331 | S 30100 | X12 Cr Ni 1707 |
SS 304 | X02 Cr 19 Ni 10 | 304 | 1.4301 | Z 6 CN 18-19 | SUS 304 | 304 S 15 | 142333 | S 30400 | X5 Cr Ni 1810 |
SS 304L | – | 304L | 1.4306 | Z 2 CN 18-10 | SUS 304 L | 304 S 11 | 142352 | S 30303 | X2 Cr Ni 1811 |
SS 310S | – | 310S | 1.4845 | – | SUS 310 S | – | 142361 | S 31008 | X6 Cr Ni 2520 |
SS 316 | X04 Cr 17 Ni 12 Mo 2 | 316 | 1.4401 | Z 6 CND 17-11 | SUS 316 | 316 S 31 | 142347 | S 31600 | X8 Cr Ni Mo 1713 |
SS 316L | X02 Cr 17 Ni 12 Mo 2 | 316L | 1.4404 | Z 2 CND 17-12 | SUS 316 L | 316 S 31 | 142338 | S 31603 | X2 Cr Ni Mo 1712 |
SS 321 | X04 Cr 18 Ni 10 Ti 20 | 321 | 1.4878 | Z 6 CNT 18-12 | SUS 321 | 321 S 31 | 142337 | S 32100 | X6 Cr Ni Ti1811 |
SS 409 | – | 409 | 1.4512 | Z 5 CT 12 | SUS 409 | 409 S 17 | – | S 40900 | – |
SS 410S | – | 410S | – | – | – | – | – | – | – |
SS 430 | X10 Cr 17 | 430 | 1.4016 | Z 8 C 17 | SUS 430 | 430 S 17 | 142320 | S 43000 | X12 Cr 17 C |
SS 409M | – | – | – | – | – | HYFAB 3/12 | – | – | – |
Size (1000 x 1000) MM Unit : Kg | ||
Thick (mm) | 300 series (Density: 8g/cc) | 400 series (Density: 7.7 g/cc) |
0.30 | 2.40 | 2.31 |
0.40 | 3.20 | 3.08 |
0.50 | 4.00 | 3.85 |
0.6 | 4.8 | 3.85 |
0.7 | 5.6 | 4.85 |
0.8 | 6.4 | 5.39 |
0.9 | 7.2 | 6.16 |
1.00 | 8.00 | 7.70 |
1.25 | 10.00 | 9.63 |
1.5 | 12 | 12.32 |
2.00 | 16.00 | 15.40 |
2.50 | 20.00 | 19.25 |
3.00 | 24.00 | 23.10 |
4.00 | 32.00 | 30.80 |
5.00 | 40.00 | 38.50 |
6.00 | 48.00 | 46.20 |
8.00 | 64.00 | 61.60 |
* These weights are theoretical, for guidance only and are not to be used for commercial purpose, as there is a tolerance on thickness, width and length.
An austenitic stainless steel, it has the ability to attain high strength with some sacrifice of ductility through moderate or severe cold working. It can be used where high strength to weight ratio is required with good general corrosion resistance. By varying chemical composition within ASTM limits and temper rolling broad range of magnetic & mechanical properties can be achieved for a variety of applications. The susceptibility to carbide precipitation during welding restricts its use in many applications in favour of 304 grade. Transportation cars such as railway coaches, wagons, subway cars, electrical equipment and endless belts are some of the major applications where SS 301 is preferred.
A Cr-Ni austenitic stainless steel, similar to SS301 with lower carbon (0.03%) and higher Nitrogen (0.20%), it has the ability to attain high strength without much sacrifice of ductility through moderate or severe cold working. It can be used where high strength to weight ratio is required with good general corrosion resistance & weldability. Broad range of mechanical properties with good Weldability can be achieved by temper rolling. Transportation cars such as railway coaches, wagons, fixtures for construction purposes, electrical equipment and endless belts are some of the major applications.
The most widely used austenitic stainless steel with a nominal composition of 18% Chromium & 8% Nickel It has excellent general corrosion resistance and forming characteristics. It finds application in transport, chemical, petrochemical and fertilizers industries, dairy, food processing, pharmaceutical industries, hospital equipment, cryogenic vessels, households as utensils & appliances , heat exchangers, machinery in paper, pulp, textile and beverage industries. In architectural applications it is used for panels, curtain walls, roofing etc. The weld ability of this grade is very good; it can be used in work hardened condition for uses requiring high strength.
An austenitic stainless steel similar to SS 304 with lower carbon level (0.03% max). Used in place of SS 304 for improved resistance to Intergranular corrosion and excellent Weldability. It is used for parts and structures which cannot be heat treated after welding. It has less tendency to work hardened by cold working.
This is an austenitic stainless steel with a higher Chromium and Nickel content. The restricted Carbon helps in better welding and formability. Because of their relatively high creep strength and mechanical properties at higher temperatures, these grades find applications where higher temperature and severe service conditions exist. They have high temperature scaling resistance but not good for high sulphur environments. Used for air heaters, annealing boxes, ovens, carburizing boxes, fire box sheets, furnace linings, furnace stacks and dampers, gas turbine parts, heat exchangers, kiln linings, nozzle diaphragm assemblies for turbo jet engines, oil burner parts, paper mill equipment, oil refinery equipment and recuperater.
An austenitic stainless steel with 2 to 3% Molybdenum to have improved corrosion resistance, particularly apparent for pitting and crevice corrosion resistance in chloride environment. This grade has good oxidation resistance. Continuous use at 425-860 degree C is not recommended due to carbide precipitation. Typical applications include architectural trims, marine exteriors, chemical processing equipment, food processing equipment, petroleum refining equipment, pharmaceuticals equipment, photographic equipment, pulp & paper processing equipment and textile finishing equipment.
An austenitic stainless steel similar to SS 316 with lower carbon level (0.03% ) to have better corrosion resistance and Weldability. Low carbon content also reduces work hardening and improves ductility for cold forging, drawing etc., Low hot strength than SS316.Typical applications include food processing, chemical and petrochemical equipment, brewery equipment, coastal architectural paneling ,laboratory equipments, heat exchangers, mining screens, chemical transportation containers etc.
An austenitic stainless steel similar to SS 304 but stabilised with Titanium to avoid inter-granular corrosion. It has a good Weldability and is used for exhaust stacks and manifolds, pressure vessels, large mufflers for engines, expansion bellows, stack liners, thin wall tubes etc where no post heat treatment of welds is desired.
It is a low alloyed straight Chromium Ferro-magnetic stainless steel. It replaces carbon steels and low alloy steels where elevated temperature corrosion resistance , medium strength & good formability are required. Titanium is added to improve the weldability. Typical application are fins in heater tubes, transformer and capacitor cases, dry fertilizer spreaders, automotive exhaust systems including mufflers, pipes and emission control units, shipping containers and farm equipment.
Type SS 409 M is a modified version of SS 409 with lower carbon content (0.03%). It replaces carbon steels and low alloy steels where higher strength, abrasion resistance, weld-ability and slide-ability are required. It posses good scaling &oxidation resistance at elevated temperature including sulphur bearing atmospheres. It finds application in bulk solids handling areas/bunkers, transport(wagons), petrochemical, sugar, agriculture, fishing, mining &quarrying, sewage plants and general engineering industries.
SS 410S is a ferritic stainless steel having 11% chromium minimum. It is mainly used for its high strength and wear resistance and in mild corrosive environment. Typical applications are furnace parts and burners operating at lower temperatures, tray supports, bubbles caps and internals in petroleum fractionating towers. It has moderate weldability and formability.
SS 420 is a Martensitic Stainless Steel contains Carbon 0.15% min. and around 12% Chromium. It has good ductility in annealed condition and capable of being hardened to high hardness(~50HRC) by heat treatment. Weldability is poor. Typical applications are cutlery, knife blades, surgical equipments, needle valves, shear blades, scissors, hand tools.
SS 430, is a ferritic, non-hardenable plain chromium stainless steel with 16- 18% Chromium content. It has good corrosion resistance & formability but less than that of SS304. Typical applications are decorative trims, refrigerators, cookers, stove elements, fasteners, flue linings, scientific apparatus storage vessels, solar water heaters, kitchenware, tableware, washing machine parts, building and construction hardware, automobile components etc.
All grades belong to low nickel Chrome Manganese stainless steels commonly referred to 200 series. The Nickel content is replaced with Manganese, Nitrogen & Copper. These alloys are non magnetic in annealed condition and like SS 304 becomes mildly magnetic after cold working. It is recommended for applications of stainless steels exposed to normal atmospheric conditions and moderate drawing requirement. Typical applications are utensils , appliances, consumable durables, transport, food processing, building &constructions etc.
Performance with respect to formability, Weldability and general corrosion resistance, these grades can be rated in common scale as depicted below (indicative, not to the scale):
Surface finish is an important element in any specification for stainless steel. For those applications in which appearance is important, finish is a design element and must be specified to avoid receiving a finish that is not appropriate for the application.
There are several good reasons for paying close attention to the finish designation. In architecture or other highly visible applications, the appearance of stainless steel is a critical design element and a misunderstanding or the wrong finish can alter the desired effect.
On the other hand, some fabrication operations in manufacturing stainless steel products such as deep drawing, rough surface/texture yield better results by holding lubricants for better lubrication.
The surface on stainless steel from the mill or steel warehouse is either the result of processes used in producing the basic mill form or it is the result of subsequent operations performed specifically to alter the surface condition or appearance.
Mill processes include hot rolling, cold rolling, annealing and pickling. These operations are intended to bring the steel product to a specific dimension and metallurgical condition and the resulting finish is generally referred to as a rolled (or unpolished) finish.
Subsequent mechanical operations, however, which include grinding, polishing and buffing are intended primarily to enhance the brightness of the surface.
Rolled finishes serve a very broad and practical use because they are usually the simplest to produce and they are generally the lowest in cost.
Stainless steel flat products are usually produced from cast slabs by hot rolling at steckel mill as hot rolled coils. Hot Rolled Coils are further processed at annealing& descaling line for softening and then cold rolled at Z-mill to specified thickness. The cold rolled coil is further annealed & descaled to get required surface finish.
Rolled product finishes are designated by a system of numbers No: 1,2D & 2B and mechanically polished finishes by No: 3, No: 4 & No: 8.Various other specific rolled pattern finishes are also in vogue. They are produced by rolling with special rolls in which designs are engraved / etched.
Hot rolled coils are annealed ,shot blasted and pickled which results in a dull, slightly rough surface, quite suitable for industrial applications which generally involve a range of thicknesses.
Typical uses : Air heaters, annealing boxes, boiler baffles, ducts, carburizing boxes, coal & ore handling systems, crystallizing pans, fire box sheets, furnace supports, conveyors, lining, damper, stacks, gas turbine parts, heat exchanger tubing supports and baffles, incinerators, industrial over liners, kiln liners, oil burner parts, pipes, rail coach / wagon components, recuperators, refinery equipment, tube hangers etc.
The starting material for cold rolling is a No. 1 finish coil. Cold rolled material is supplied with the following standard mill finishes.
Cold rolled, annealed and pickled No.1 finish material results in a uniform dull finish, superior to No.1 finish suitable for industrial application and deep drawing .The dull surface (which may be polished after fabrication) retains the lubricant during the drawing operation.
Typical uses: Utensils & appliances,Automotive exhaust systems, builders’ hardware, chemicals & petrochemical equipment, electric appliance parts, furnace parts, household ware, kitchen equipment, rail coach parts, trays & pans for chemical equipment etc.
2D finish material is given a light skin pass operation between polished rolls to get 2B finish, which is the most common finish for sheet material. It is brighter than 2Dfinish and is semi reflective which in turn depends on the grade of stainless steel. It is commonly used for most deep drawing operations and is more easily polished to the final finishes required than in a 2D finish.
Typical uses : Bake ware, chemical plant equipment, cookware, dairy & food processing machinery, drums, dryers, dye house equipment, flatware, laundry equipment, paper mill equipment, pharmaceutical equipment, plumbing fixtures, refrigeration equipment, steel metal products, small tanks, solar collector panels, washing machine parts, welded tubing & pipe for general service etc.
The following are mechanically produced polished finishes, as well as standard mill finishes. They are also used to produce stainless steel articles and components that require aesthetics. It should be appreciated that factors such as hand polishing vs mechanical polishing, polishing a flat product as against a component of complex shape and thickness and composition of material can affect the visual appearance of the final surface.
This is a ground unidirectional uniform finish obtained with 100, 120 grit abrasive. It is a good intermediate or starting surface finish for use in such instances where the surface will require further polishing operations to a finer finish after subsequent fabrication or forming. It can also be used as a final finish in certain applications.
Typical uses: Architectural components, brewery equipment, food processing, institutional kitchen equipment.
This is a ground unidirectional finish obtained with 120-150 grit abrasive. It is not highly reflective, but is a good general purpose finish on components which will suffer from fairly rough handling in service (e.g. restaurant equipment).
Typical uses : Appliances, architectural wall panels, beverage equipment, column cladding, dairy equipment, elevator door & interiors, escalator trim, furniture, hospital equipment, instrument or control panels, kitchen equipment, luggage handling equipment, mass transit equipment, restaurant equipment, sinks, sterilizers, store fronts, tankers, etc.
A highly reflective finish that is commonly produced on sheet. It is obtained by polishing with rotating cloth mops and polishing soaps / paste containing fine abrasives. The directionality of polishing may be seen in the sheets. They have a high degree of reflectivity.
Typical uses: Architectural parts, press plates, reflectors etc.
Moon Rock, Chequered, Striped, Hammer Tone, Pearl Plus, Honeykom, Macromatt, Aqualine, Frondz, Mystique, Linen, Epiderma, Fabrique finishes
* Special finishes are produced as per following route: –
— Hard route -> Work hardened condition
— Soft route -> Cold rolled, annealed & pickled and skinpassed (either ground or un-ground)
Typical uses: Architectural panels, flooring, interior decoration, transport industry etc.
This is produced by using a specific rough ground roll during skin passing of 2D finish material. It offers a matt surface with least reflectivity.
Typical uses: Architectural panels, counter tops, body for kitchen appliances etc.
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