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ProductsStainless Steel
Many types of stainless steels have been developed to resist different corrosion environments and working conditions ensuring that factories are safe, structures last longer and our food is hygienic. Stainless steel is even used in systems to clean up the exhaust gases from cars and power stations. Stainless steel is also recyclable: when scrapped, it can be re-melted to make something new.
The four major types of stainless steel are:
• Austenitic
• Ferritic
• Austenitic-Ferritic (Duplex)
• Martensitic
Austenitic Stainless Steels
Austenitic is the most widely used type of stainless steel. Nickel and manganese are two alloying elements that will make the structure fully austenitic if added in appropriate amounts. An austenitic structure promotes ductility, non-magnetic properties, good weldability and possibilities for a wide range of service temperatures. The range of applications of austenitic stainless steel includes housewares, containers, industrial piping and vessels, architectural facades and constructional structures.
Ferritic Stainless Steels
Ferritic stainless steel has properties similar to mild steel but with the better corrosion resistance. The most common of these steels are 12% and 17% chromium containing steels, with 12% used mostly in structural applications and 17% in housewares, boilers, washing machines and indoor architecture.
Austenitic-Ferritic (Duplex) Stainless Steels
Duplex stainless steel has a ferritic and austenitic lattice structure - hence common name: duplex stainless steel. Duplex stainless steels have a smaller nickel-content than the austenitic grades. The structure is 50 % ferritic and 50 % austenitic and this gives a layered structure with high strength. The Duplex grades are widely used in tank applications, pulp & paper industry, oil& gas industry and in desalination.
Martensitic Stainless Steels
Martensitic stainless steel contains mostly 11 to 13% chromium and is both strong and hard with moderate corrosion resistance. This steel is for instance used in turbine blades and in knives.
| CHEMICAL COMPOSITION ( IN PERCENTAGE ) | ||||||||||
| Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr | Ni | Mo | Nitrogen (Max) | Cu/ Others |
| 201 | 0.15 | 5.50/7.50 | 0.06 | 0.030 | 1.0 | 16.0/18.0 | 3.5/5.5 | - | - | n-25 max |
| 202 | 0.15 | 7.50/10.0 | 0.06 | 0.030. | 1.0 | 17.0/19.0 | 4.0/6.0 | - | - | n-25 max |
| JS- 203 | 0.08 | 9.2510.25 | 0.070 | 0.030 | 0.75 | 14.25 - 15.25 | 2.25 - 2.75 | - | - | 1.60- 2.0 |
| 301 | 0.15 | 2.00 | 0.045 | 0.030 | 1.00 | 16.00 - 18.00 | 6.00 - 8.00 | - | 0.10 | - |
| 301M | 0.10 | 4.55.5 | 0.060 | 0.030 | 0.75 | 14.50 - 15.50 | 6.0 - 7.0 | - | - | 1.70- 1.90 |
| 304 | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 18.00 - 20.00 | 8.00- 10.50 | - | 0.10 | - |
| 304L | 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 18.00 - 20.00 | 8.00- 12.00 | - | 0.10 | - |
| 309s | 0.08 | 2.0 | 0.045 | 0.030 | 1.0 | 22.0/24.0 | 12.0/15.0 | |||
| 310 | 0.25 | 2.0 | 0.045 | 0.030 | 1.50 | 24.0/26.0 | 19.0/22.0 | |||
| 310S | 0.08 | 2.00 | 0.045 | 0.030 | 1.50 | 24.00- 26.00 | 19.00 - 22.00 | - | - | - |
| 316 | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | 0.10 | - |
| 316L | 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 16.00 - 18.00 | 10.00 - 14.00 | 2.00 - 3.00 | 0.10 | - |
| 317 | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 18.00 - 20.00 | 11.00 - 14.00 | 3.00 - 4.00 | 0.10 | - |
| 317L | 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 18.00 - 20.00 | 11.00 - 15.00 | 3.00 - 4.00 | 0.10 | - |
| 321 | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 17.00 - 19.00 | 9.00 - 12.00 | - | 0.10 | Ti5 ( C + N ) Min or 0.70 max |
| 347 | 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 17.00 - 19.00 | 9.00 - 13.00 | - | - | Cb= 10x ( C Min ) or 1.00 Max |
| 409 | 0.08 | 1.00 | 0.040 | 0.010 | 1.00 | 10.50 - 11.75 | 0.50 | - | - | Ti= 6x (C+ N ) Min or 0.70 Max |
| 409M | 0.03 | 0.81.2 | 0.030 | 0.030 | 0.40.75 | 11.00- 12.00 | 1.5 max. | - | - | Ti= 6x (C) Min or 0.70 Max |
| 410S | 0.08 | 1.00 | 0.040 | 0.030 | 1.00 | 11.50- 13.50 | 0.60 | - | - | - |
| 410 | 0.15 | 1.00 | 0.040 | 0.030 | 1.00 | 11.50- 13.50 | 0.75 | - | - | - |
| 420 | 0.35 | 0.50 | 0.035 | 0.015 | 0.50 | 12.00 - 13.00 | 0.20.3 | - | - | - |
| 440A | 0.60/0.70 | 1.0 | 0.040 | 0.030 | 1.0 | 16.0/18.0 | - | - | - | - |
| 440B | 0.75,0.95 | 1.0 | 0.040 | 0.030 | 1.0 | 16.0/18.0 | - | - | - | - |
| 440C | 0.95, 1.2 | 1.0 | 0.040 | 0.030 | 1.0 | 16.0/18.0 | - | - | - | - |
| 430 | 0.12 | 1.00 | 0.040 | 0.030 | 1.00 | 16.00 - 18.00 | 0.75 | - | - | - |
| JSL AUS | 0.08 | 7.08.0 | 0.070 | 0.030 | 0.75 | 15.50 - 16.50 | 4.25 - 4.75 | - | - | 0.9 - 1.10 |
| 904L | 0.02 | 2.00 | 0.030 | 0.045 | 1.00 | 19.0-23.0 | 23.0-28.0 | - | - | 23.0-28.0 |
| 2205 | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 21.0-23.0 | 4.5-6.5 | 4.5-6.5 | ||
| 2207 | 0.030 | 1.20 | 0.035 | 0.020 | 0.30 | 24.0-26.0 | 6.0-8.0 | - | - | 6.0-8.0 |