301
Data verified301 is a metastable austenitic stainless steel with lower nickel than 304, so it work-hardens dramatically during cold forming. It is the classic grade for springs and high-strength formed parts in stainless.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.15 |
| Si | ≤1.00 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 16.00–18.00 |
| Ni | 6.00–8.00 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed (also supplied in hard tempers) |
| Hardness | ≤187 HB (annealed) |
| Tensile strength | 515–1035 MPa (temper dependent) |
| Density | 7.90 g/cm³ |
Heat treatment
Solution anneal 1010–1120 °C, rapid cool. Cold work raises strength strongly; supplied annealed or in rolled tempers up to extra-hard.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4310 |
| aisi | 301 |
| jis | SUS301 |
| gb | 12Cr17Ni7 |
Compare side by side: 301 vs 302 · 301 vs 304
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Springs, railcar and trailer panels, aircraft structural parts, conveyor belts, fasteners.
Processing: Excellent for roll forming and deep drawing with high springback control needed; weldable, though the heat-affected zone loses temper strength.
FAQ
- Why is 301 used for springs?
- Its austenite is less stable, so cold rolling converts part of it to martensite and raises tensile strength above 1000 MPa while keeping useful corrosion resistance.
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Ask for a quotationVisit NasteelSource: ASTM A240 / EN 10088 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.