Stainless Steel 1.4310 · supply condition · default condition
Stainless Steel 1.4310 +C1000
Properties of the +C1000 condition, compared with the other 1.4310 tempers.
The workhorse spring-strip temper: good balance of spring force, bendability and availability.
What is 1.4310 +C1000?
1.4310 +C1000 is 1.4310 supplied in the +C1000 condition — the workhorse spring-strip temper: good balance of spring force, bendability and availability. 1.4310 +C1000 has a yield strength of 780 MPa (113 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 95% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 190 GPa (27.6 Msi). 1.4310 +C1000 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 67% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Advantages
- High strength — 780 MPa (113 ksi), better than 95% of stainless steel grades
Limitations
- Limited ductility — 10%, worse than 98% of stainless steel grades
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Needs corrosion protection — 52/100, worse than 77% of stainless steel grades
1.4310 +C1000 properties
Typical room-temperature values for 1.4310 +C1000 — 12 properties are specific to this condition; the rest are grade-level values shared by every 1.4310 temper. Each bar shows where the value sits among the stainless steel grades in FabDigit's library — further right is higher.
Physical3
1.4310 +C1000 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 67% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical11
1.4310 +C1000 has a yield strength of 780 MPa (113 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 95% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal6
1.4310 +C1000 is rated for continuous service to 300°C (572 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4310 +C1000 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (52/100), worse than 77% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4310 +C1000 takes about 53 MJ of energy and emits 4.6 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4310 +C1000's machinability is poor (28/100, worse than 80% of stainless steel grades); weldability good (55/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 1.4310 tempers and conditions
1.4310 is also supplied in 9 other conditions. The full side-by-side table is on the 1.4310 overview.
- +C1000DefaultThe workhorse spring-strip temper: good balance of spring force, bendability and availability.780 MPa yield · 32 HRC
- +C1900Maximum-strength razor/feeler-gauge type strip; essentially flat parts only, no forming.1,750 MPa yield · 53 HRC
- +C1700Very high-strength thin strip (typically <0.5 mm) for miniature springs and contact blades.1,550 MPa yield · 50 HRC
- +C1500Extra-hard thin strip for high-force springs and shims where only gentle bending is needed.1,350 MPa yield · 47 HRC
- +C1300Full-hard spring temper for flat springs, contact strips and clamping bands.1,150 MPa yield · 43 HRC
- +C1150Three-quarter-hard strip for higher spring force with generous bend radii.950 MPa yield · 38 HRC
- +C1000+SRPost-form low-temperature age to raise elastic limit, reduce spring set/relaxation and stabilise shape.950 MPa yield · 35 HRC
- +C800Quarter-hard strip for clips, brackets and shims that still need 90° bending across the rolling direction.570 MPa yield · 25 HRC
- +C700Lightly rolled temper when moderate strength must be combined with substantial forming/bending.450 MPa yield · 99 HRB
- +ATPick for deep-drawn/stamped parts that will be work-hardened in service or for material to be re-rolled to temper.280 MPa yield · 165 HB
Working with 1.4310 +C1000
Is 1.4310 easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed and flood coolant; cold-worked tempers cut better but load tools more, blanking/stamping is the preferred route.
Can 1.4310 be welded?
Resistance, laser and TIG weld readily (308L/307 filler); the 0.05–0.15 % C invites carbide precipitation, and welding destroys the cold-work strength in the HAZ, so spring parts should be joined away from the working section.
Can 1.4310 be formed, bent or molded?
Anneal-temper stock stamps and deep-draws superbly (heavy springback, strong work-hardening, may need interstage anneals); high +C tempers bend only across the rolling direction with generous radii (≥1–3 t).
What surface finishes work on 1.4310?
Passivate per ASTM A967 or electropolish after forming; 2R/BA and No.4 finishes polish well; do not anodize — plating (Ni, Sn) needs a Woods-nickel strike.
1.4310 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Chigh C is what enables the strong work hardening | 0.05 – 0.15 | 0.11 |
| Si | ≤ 2 | 0.6 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.05 | — |
| S | ≤ 0.02 | — |
| Cr | 16 – 19 | 17.3 |
| Ni | 6 – 9.5 | 7.3 |
| Moresidual limit per EN 10088-2 | ≤ 0.8 | — |
| N | ≤ 0.11 | 0.04 |
| Fe | balance | — |
1.4310 +C1000 — frequently asked
What is 1.4310 +C1000 used for?
1.4310 +C1000 is typically used for springs, clips, cutlery and structural strip for cold-formed parts. In short: work-hardening spring stainless; tempers to 1900 MPa; strength by cold rolling.
What is the yield strength of 1.4310 +C1000?
1.4310 +C1000 has a typical yield strength of 780 MPa (113 ksi) and a tensile strength of 1,100 MPa (160 ksi) — stronger than 95% of stainless steel grades. Strength varies by condition: see the 10 listed tempers.
Is 1.4310 +C1000 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 80% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed and flood coolant; cold-worked tempers cut better but load tools more, blanking/stamping is the preferred route.
Can 1.4310 +C1000 be welded?
Yes — weldability is rated good (55/100). Resistance, laser and TIG weld readily (308L/307 filler); the 0.05–0.15 % C invites carbide precipitation, and welding destroys the cold-work strength in the HAZ, so spring parts should be joined away from the working section.
What surface finishes work on 1.4310 +C1000?
Passivate per ASTM A967 or electropolish after forming; 2R/BA and No.4 finishes polish well; do not anodize — plating (Ni, Sn) needs a Woods-nickel strike.
Can 1.4310 +C1000 be formed, bent or molded?
Anneal-temper stock stamps and deep-draws superbly (heavy springback, strong work-hardening, may need interstage anneals); high +C tempers bend only across the rolling direction with generous radii (≥1–3 t).
What is the maximum service temperature of 1.4310 +C1000?
1.4310 +C1000 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10088-2 Stainless steels — Technical delivery conditions for sheet/plate and strip — CEN (2014)
- EN 10151 Stainless steel strip for springs — Technical delivery conditions — CEN (2002)
- ASTM A666 Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- GB/T 3280 (12Cr17Ni7) — SAC (2015)
- JIS G4313 Cold-rolled stainless steel strip for springs (SUS301) — JSA (2011)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Precision stainless spring strip 1.4310 data sheets — Outokumpu / Sandvik / Aperam (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.