Stainless Steel grades at a glance with ASTM specification and equivalent chart
Stainless steel application is very common nowadays in a host of industries and domestic appliances. Stainless steel is corrosion resistant to certain extent depending on the grade and standard of the steel which correspond to the material make and composition of the particular steel. All stainless steel materials contain chromium and carbon. The amounts vary depending on the grades. These two additions make the corrosion resistance and strength properties. Other elements are added in different grades to bring up the strength and the corrosion resistance properties. Molybdenum is an important addition in most compositions. Molybdenum plays a role in adding pitting corrosion attack resistance and resistance against reducing acids. Stainless steel flat products are seen in cookware, surgical instruments and in cutlery. A lot of household items are made up of stainless steel. One most common usage is in the piping. There are pipes and pipe fittings that are made out of stainless steel. The pipes and fittings are used in both domestic applications as well as in industrial applications. The stainless steel industrial products range from pipes to cladding material to tanks and containers. The products are used in transportation industry. The construction industry uses stainless steel for the superior strength. There are different types of stainless steel. The different families of stainless steel are austenitic, ferritic, martensitic and duplex. The duplex steel has both the ferritic and austenitic steel properties. The grades of stainless steel vary with the composition of the material and the makeup procedures. There are hot rolled and annealed; hot rolled, annealed and passivated; cold rolled, annealed, pickled and passivated; bright annealed; brush finished and many other grades. The grades are numbered for universal identities. The stainless steel suppliers sell all kinds of stainless steel in different forms, shapes and sizes. You can contact us for a list of available stainless steel products and for the price inquiry.
Available Sectional Forms
Stainless Steel Grades
- Austenitic stainless steel: 200 and 300 series
- Ferritic stainless steels means 400 series (contain 10% to 30% chromium content)
- Martensitic stainless steels : Its have 11 – 17% chromium with 0.15 – 0.63% carbon.
- Precipitation Hardening (PH) stainless steel: 17-7 PH® and PH 15-7 Mo®.
- NITRONIC® 19D, duplex 2205, Super Duplex 2507
Available Grades
| SS 201 | Inox 201 | DIN 1.4372 | UNS S20100 | SUS 201 |
| SS 202 | Inox 202 | DIN 1.4373 | UNS S20200 | SUS 202 |
| SS 303 | Inox 303 | DIN 1.4305 | UNS S30300 | SUS 303 |
| SS 304 | Inox 304 | DIN 1.4301 | UNS S30400 | SUS 304 |
| SS 304L | Inox 304L | DIN 1.4307 | UNS S30403 | SUS 304L |
| SS 304H | Inox 304H | DIN 1.4948 | UNS S30409 | SUS 304H |
| SS 316 | Inox 316 | DIN 1.4401 | UNS S31600 | SUS 316 |
| SS 316L | Inox 316L | DIN 1.4404 | UNS S31603 | SUS 316L |
| SS 316H | Inox 316H | DIN 1.4919 | UNS S31609 | SUS 316H |
| SS 316Ti | Inox 316Ti | DIN 1.4571 | UNS S31635 | SUS 316Ti |
| SS 321 | Inox 321 | DIN 1.4541 | UNS S32100 | SUS 321 |
| SS 321H | Inox 321H | DIN 1.4878 | UNS S32109 | SUS 321H |
| SS 329 | Inox 329 | DIN 1.4460 | UNS S32900 | SUS 329 |
| SS 347 | Inox 347 | DIN 1.4550 | UNS S34700 | SUS 347 |
| SS 347H | Inox 347H | DIN 1.4961 | UNS S34709 | SUS 347H |
| SS 310 | Inox 310 | DIN 1.4840 | UNS S31000 | SUS 310 |
| SS 310S | Inox 310S | DIN 1.4845 | UNS S31008 | SUS 310S |
| SS 317 | Inox 317 | DIN 1.4449 | UNS S31700 | SUS 317 |
| SS 317L | Inox 317L | DIN 1.4438 | UNS S31703 | SUS 317L |
| SS 314 | Inox 314 | DIN 1.4841 | UNS S31400 | SUS 314 |
| SS 410 | Inox 410 | DIN 1.4006 | UNS S41000 | SUS 410 |
| SS 416 | Inox 416 | DIN 1.4005 | UNS S41600 | SUS 416 |
| SS 420 | Inox 420 | DIN 1.4021 | UNS S42000 | SUS 420 |
| SS 430 | Inox 430 | DIN 1.4016 | UNS S43000 | SUS 430 |
| SS 430F | Inox 430 | DIN 1.4104 | UNS S43020 | SUS 430 |
| SS 431 | Inox 431 | DIN 1.4057 | UNS S43100 | SUS 431 |
| SS 440C | Inox 440C | DIN 1.4125 | UNS S44004 | SUS 440C |
| SS 446 | Inox 446 | DIN 1.4762 | UNS S44600 | SUS 446 |
| SS 422 | Inox 422 | DIN 1.4742 | UNS S44200 | SUS 422 |
| SS 904L | Inox 904L | DIN 1.4539 | UNS N08904 | SUS 904L |
| 17-4PH | DIN 1.4542 | UNS S17400 | SUS 630 | |
| 15-5PH | DIN 1.4545 | UNS S15500 | XM-12 | |
| 13-8PH | DIN 1.4534 | UNS S13800 | ||
| Alloy A286 | DIN 1.4980 | UNS S66286 | ||
| Alloy 660 | UNS S66286 | SUH 660 | ||
| Nitronic 50 | DIN 1.3964 | UNS S20910 | XM-19 | |
| Nitronic 60 | UNS S21800 | Alloy 218 |
Stainless Steel Applications
- Martensitic stainless steels applications for the include cookwear, cutlery, springs etc.
- Austenitics steels mainly used in automotive trim, cookware, processing equipment, food and beverage equipment, and a variety of industrial applications.
- PH steels are in high demand by aerospace industries
- Used in heat exchangers, boilers, pressure vessels and tanks in chemical and oil and gas industries
Stainless Steel Types
Stainless steel is usually divided into 5 types:
- Ferritic
- Austenitic
- Martensitic
- Duplex
- Precipitation hardening (PH)
Stainless Steel Properties
Austenitic Grades
| Grade | WNR No. | Tensile Strength (MPa) |
|---|---|---|
| 304 | 1.4301 | 540 – 750 |
| 304L | 1.4307 | 520 – 700 |
| 316 | 1.4401 | 520 – 670 |
| 316L | 1.4404 | 530 – 680 |
Ferritic Grades
| Grade | WNR Number | Tensile Strength (MPa) | transverse Proof Strength 0.2% (MPa) | Longitudinal Proof Strength 0.2% (MPa) |
|---|---|---|---|---|
| 409 | 1.4512 | 380 – 560 | 220 | 210 |
| 430 | 1.4016 | 430 – 600 | 280 | 260 |
| 439 | 1.4510 | 420 – 600 | 240 | 230 |
| 4509 | 1.4509 | 430 – 630 | 250 | 230 |
Martensitic Grades
| Grade | WNR Specification | Max Thickness (mm) |
|---|---|---|
| 420 | 1.4031 | 3.0 |
Stainless Steel Composition
Austenitic Grades
| Grade | WNR Specification | Manganese (Mn) | Nickel (Ni) | Carbon (C) | Chromium (Cr) | Silicon (S) | Phosphorus (P) | Sulfur (S) | Molybdenum (Mo) | Nitrogen (N) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 201 | 1.4372 | 5.5 – 7.5 | 3.5 – 5.5 | 0.15 | 16.0 – 18.0 | 1.00 | 0.045 | 0.015 | – | 0.05 – 0.25 | Balance |
| 301 | 1.4310 | 2.00 | 6.0 – 9.5 | 0.05 – 0.15 | 16.0 – 19.0 | 2.00 | 0.045 | 0.015 | 0.80 | 0.10 | Balance |
| 316 | 1.4401 | 2.00 | 10.0 – 13.0 | 0.07 | 16.5 – 18.5 | 1.00 | 0.045 | 0.015 | 2.0 – 2.5 | 0.1 | Balance |
| 316L | 1.4404 | 2.00 | 10.0 – 13.0 | 0.03 | 16.5 – 18.5 | 1.00 | 0.045 | 0.015 | 2.0 – 2.5 | 0.1 | Balance |
| 304 | 1.4301 | 2.00 | 8.0 – 10.5 | 0.07 | 17.5 – 19.5 | 1.00 | 0.045 | 0.015 | – | 0.1 | Balance |
| 304L | 1.4307 | 2.00 | 8.0 – 10.5 | 0.03 | 17.5 – 19.5 | 1.00 | 0.045 | 0.015 | – | 0.1 | Balance |
Ferritic Grades
| Grade | EN No. | Carbon (C) | Si | P | S | Cr | Mn | Ni | Nb | Mo | Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 409 | 1.4512 | 0.030 | 1.00 | 0.040 | 0.015 | 10.5 – 12.5 | 1.00 | – | – | – | [6 x (C + N)] to max 0.65 |
| 430 | 1.4016 | 0.080 | 1.00 | 0.040 | 0.015 | 16.0 – 18.0 | 1.00 | – | – | – | – |
| 439 | 1.4510 | 0.050 | 1.00 | 0.040 | 0.015 | 16.0 – 18.0 | 1.00 | – | (3 x C + 0.3) to max 1 | – | [4 x (C + N) + 0.15] to max 0.8 |
| 434 | 1.4113 | 0.080 | 1.00 | 0.040 | 0.015 | 16.0 – 18.0 | 1.00 | – | – | – | – |
| 4509 | 1.4509 | 0.030 | 1.00 | 0.040 | 0.015 | 17.5 – 18.5 | 1.00 | – | – | – | 0.1 – 0.6 |
| 436 | 1.4513 | 0.025 | 1.00 | 0.040 | 0.015 | 16.0 – 18.0 | 1.00 | 0.020 | – | 0.80 – 1.40 | [4 x (C + N) + 0 |
Martensitic Grades
| Grade | Werkstoff nr | Carbon (C) | Chromium (Cr) | Mn | Phosphorus (P) | S | Ni | Nitrogen (N) | Sulfur (S) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|---|
| 410 | 1.4006 | 0.08 – 0.15 | 11.5 – 13.5 | 1.50 | 0.040 | 1.00 | 0.75 | – | 0.015 | Bal. |
| 420 | 1.4021 | 0.16 – 0.25 | 12.0 – 14.0 | 1.50 | 0.040 | 1.00 | – | – | 0.015 | Bal. |
| 420 | 1.4031 | 0.07 | 17.5 – 19.5 | 2.00 | 0.045 | 1.00 | 8.0 – 10.5 | 0.1 | 0.015 | Bal. |
We at RMT produce high quality Steel Pipes and tubes at best price, choose the pipes in your required sizes. We accept all large and small orders happily. You can contact us for ready stock and sizes, for urgent deliveries please mail to info@rmtindustry.com. We stock wide range of steel pipes, tubes, sheets, plates, round bars, rods, flat products, pipe fittings -buttweld / forged, fasteners in all materials and shapes for industrial purpose. We supply these piping product globally along with mill and test certificates. We supply these piping material in stainless steel, carbon steel, alloy steel, aluminium, copper and copper nickel and special steel grades, visit our Alloys section for detailed information. We also deal in hard to find materials.
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