JIS G4313 · AISI 301 · EN 1.4310 · X10CrNi18-8
SUS301 is an austenitic stainless steel (16-18% Cr, 6-8% Ni) that achieves high strength through cold work hardening. Its metastable austenite transforms to martensite during cold rolling, producing spring-temper strips with excellent elasticity and corrosion resistance — the go-to material for electronic springs, connectors, and precision clips.
| Element | C (max) | Si (max) | Mn (max) | Cr | Ni | P (max) | S (max) |
|---|---|---|---|---|---|---|---|
| % | 0.15 | 1.00 | 2.00 | 16.0-18.0 | 6.0-8.0 | 0.045 | 0.030 |
| Condition | Hardness | Tensile Strength |
|---|---|---|
| Full Hard (FH) | 38-42 HRC | ≥1270 MPa |
| 3/4 Hard | 33-38 HRC | ≥1030 MPa |
| 1/2 Hard | 25-32 HRC | ≥860 MPa |
Composition, temper and mechanical-property tables are grade references, not guaranteed supply values. Verify the applicable standard edition, product form, condition and order-specific acceptance criteria.
| Parameter | Range |
|---|---|
| Thickness | State the required value and tolerance; confirm grade-and-temper feasibility |
| Width | State the required value, tolerance and edge condition |
| Delivery Condition | Full Hard / 3/4 Hard / 1/2 Hard / Annealed |
| Surface | 2B / BA / Mirror / No.4 Brushed |
| Standard | JIS G4313, ASTM A666, EN 10088-2 |
| JIS | AISI/ASTM | EN/DIN | GB |
|---|---|---|---|
| SUS301 | 301 | X10CrNi18-8 / 1.4310 | 1Cr17Ni7 |
Contact springs, battery clips, SIM card connectors. Full hard temper delivers high elastic limit with excellent corrosion resistance in consumer electronics.
Automotive connectors, snap clips, retaining rings. Consistent spring-back and fatigue life in 1/2 to full hard temper.
Watch springs, flex PCB stiffeners, medical device components. Ultra-thin gauge (0.05mm+) with precise hardness control.
65Mn (carbon spring) · 51CrV4 (alloy spring) · SK5 (high carbon tool)