Stainless Steel Standards
Reference data and engineering information about stainless steel standards for material properties applications.
Overview
Engineering reference data for Stainless Steel Standards in material science and properties.
Key Formulas
Stress
Force per unit area.
Strain
Change in length per original length.
Hooke's Law
Stress proportional to strain in elastic region.
Thermal Expansion
Length change due to temperature.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Stress | Pa | |
| Strain | — | |
| Young's modulus | Pa | |
| Thermal expansion coefficient | 1/°C | |
| Temperature change | °C |
International Stainless Steel Standards Comparison
The following table compares equivalent stainless steel grades across major international standards systems. When specifying materials for international projects, use this reference to identify equivalent grades.
AISI (USA) | Type | AFNOR (France) | DIN 17006 (Germany) | W.N. 17007 (Germany) | UNI (Italy) | JIS (Japan) | GOST (Russia) | BSI (UK) |
|---|---|---|---|---|---|---|---|---|
| 201 | Austenitic | — | — | — | — | SUS 201 | — | — |
| 301 | Austenitic | Z 12 CN 17-07 | X 12 CrNi 17 7 | 1.4310 | X 12 CrNi 1707 | SUS 301 | — | 301S21 |
| 302 | Austenitic | Z 10 CN 18-09 | X 5 CrNi 18 7 | 1.4319 | X 10 CrNi 1809 | SUS 302 | 12KH18N9 | 302S25 |
| 303 | Austenitic | Z 10 CNF 18-09 | X 10 CrNiS 18 9 | 1.4305 | X 10 CrNiS 1809 | SUS 303 | — | 303S21 |
| 304 | Austenitic | Z 6 CN 18-09 | X 5 CrNi 18 10 | 1.4301 | X 5 CrNi 1810 | SUS 304 | 08KH18N10 | 304S15 |
| 304L | Austenitic | Z 2 CN 18-10 | X 2 CrNi 18 11 | 1.4306 | X 2 CrNi 1911 | SUS 304L | 03KH18N11 | 304S11 |
| 304LN | Austenitic | Z 2 CN 18-10-Az | X 2 CrNiN 18 10 | 1.4311 | X 2 CrNiN 1811 | SUS 304LN | — | — |
| 305 | Austenitic | Z 8 CN 18-12 | X 8 CrNi 1812 | — | — | SUS 305 | — | 305S19 |
| 309 | Austenitic | Z 15 CN 24-13 | X 15 CrNiS 20 12 | 1.4828 | X 16 CrNi 2314 | SUH 309 | — | 309S24 |
| 310 | Austenitic | — | X 12 CrNi 25 21 | 1.4845 | X 22 CrNi 2520 | SUH 310 | 10KH23N18 | 310S24 |
| 310S | Austenitic | Z 12 CN 25-20 | X 12 CrNi 25 20 | 1.4842 | X 5 CrNi 2520 | SUS 310S | 20KH25N20S2 | — |
| 316 | Austenitic | Z 6 CND 17-11 | X 5 CrNiMo 17 12 2 | 1.4401 | X 5 CrNiMo 1712 | SUS 316 | — | 316S31 |
| 316L | Austenitic | Z 2 CND 17-12 | X 2 CrNiMo 17 13 2 | 1.4404 | X 2 CrNiMo 1712 | SUS 316L | — | 316S11 |
| 316LN | Austenitic | Z 2 CND 17-12-Az | X 2 CrNiMoN 17 12 2 | 1.4406 | X 2 CrNiMoN 1712 | SUS 316LN | 03KH16N15M3 | — |
| 316Ti | Austenitic | Z 6 CNDT 17-12 | X 6 CrNiMoTi 17 12 2 | 1.4571 | X 6 CrNiMoTi 1712 | — | 08KH17N13M2T | 320S31 |
| 317 | Austenitic | — | X 5 CrNiMo 1815 | — | — | SUS 317 | — | 317S16 |
| 317L | Austenitic | Z 2 CND 19-15 | X 2 CrNiMo 18 16 4 | 1.4438 | X 2 CrNiMo 1815 | SUS 317L | — | 317S12 |
| 321 | Austenitic | Z 6 CNT 18-10 | X 6 CrNiTi 18 10 | 1.4541 | X 6 CrNiTi 1811 | SUS 321 | 12KH18N10T | 321S31 |
| 329 | Duplex | — | X 8 CrNiMo 27 5 | 1.4460 | — | SUS 329J1 | — | — |
| 330 | Austenitic | Z 12NCS 35-16 | X 12 NiCrSi 36 16 | 1.4864 | — | SUH 330 | 08KH18N10T | — |
| 347 | Austenitic | Z 6 CNNb 18-10 | X 6 CrNiNb 18 10 | 1.4550 | X 6 CrNiNb 1811 | SUS 347 | 08KH18N12B | 347S31 |
| 904L | Austenitic | Z 12 CNDV 12-02 | — | 1.4939 | — | — | — | — |
| UNS31803 | Duplex | — | X 2 CrNiMoN 22 5 | 1.4462 | — | — | — | — |
| UNS32760 | Super Duplex | Z 3 CND 25-06Az | X 3 CrNiMoN 25 7 | 1.4501 | — | — | — | — |
| 403 | Ferritic/Martensitic | Z 12 C 13 | X 10 Cr 13 | 1.4006 | X 12 Cr 13 | SUS 403 | — | 403S17 |
| 405 | Ferritic | Z 6 CA 13 | X 6 CrAl 13 | 1.4002 | X 6 CrAl 13 | SUS 405 | — | 405S17 |
| 409 | Ferritic | Z 6 CT 12 | X 6 CrTi 12 | 1.4512 | X 6 CrTi 12 | SUH 409 | — | 409S19 |
| 410 | Ferritic/Martensitic | Z 10 C 13 | X 10 Cr 13 | 1.4006 | X 12 Cr 13 | SUS 410 | 08Kh13 | 410S21 |
| 410S | Ferritic | Z 6 C 13 | X 6 Cr 13 | 1.4000 | X 6 Cr 13 | SUS 410S | — | 403S17 |
| 414 | Martensitic | — | — | — | — | — | — | — |
Source: engineeringtoolbox.com
Stainless Steel Classification
Stainless steels are classified into three main categories based on their microstructure:
Austenitic (Series 200/300) — Grades marked with superscript 1) in the table. Non-magnetic, excellent corrosion resistance, good formability. The most widely used stainless steel family. Contains chromium (16–26%) and nickel (6–22%), often with molybdenum for enhanced corrosion resistance.
Ferritic (Series 400) — Grades marked with superscript 3) in the table. Magnetic, good corrosion resistance, lower cost than austenitic. Contains chromium (10.5–30%) with little or no nickel. Examples: 409, 405, 410S.
Duplex and Super Duplex — Grades marked with superscript 2) in the table. Mixed microstructure of austenite and ferrite. Higher strength than austenitic grades with improved resistance to stress corrosion cracking. Contains chromium (21–26%), nickel (4–8%), molybdenum, and nitrogen. Examples: UNS31803, UNS32760.
Martensitic (Series 400) — Hardenable through heat treatment, magnetic. Contains chromium (11.5–18%) with higher carbon content. Used where high strength and moderate corrosion resistance are required. Examples: 403, 410, 414.
Designation System Notes
- AISI/SAE (USA): Three-digit numerical system (e.g., 304, 316L)
- DIN (Germany): Chemical composition in designation (e.g., X 5 CrNi 18 10)
- Werkstoff Number (W.N.): 1.4xxx format for stainless steels
- JIS (Japan): Prefixed with SUS (e.g., SUS 304)
- GOST (Russia): Chemical composition notation (e.g., 08KH18N10)
- EURONORM: Harmonized European standard format