Stainless Steel S30530-SR (Stress relieved)
Heat-treated state
UNS S30530
Applied after heading/drawing to cut residual stress and SCC risk while keeping most of the cold-work strength.
Values for the SR condition
Other S30530 tempers and conditions
S30530 is listed in 7 conditions; see the grade overview at S30530.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefault Annealed | Standard supply condition for cold heading, riveting and multi-station forming — softest, maximum formability. | 240 | 550 | 55 | 140 HB | — |
Quarter hard | Light cold work for springy clips or partly formed fasteners that still need bending ductility. | 520 | 760 | 28 | 20 HRC | 2.4 % IACS |
Cold drawn | Use where a headed part needs extra strength straight from the wire without heat treatment. | 600 | 800 | 25 | 22 HRC | 2.4 % IACS |
SRThis page Stress relieved | Applied after heading/drawing to cut residual stress and SCC risk while keeping most of the cold-work strength. | 620 | 780 | 22 | 21 HRC | 2.4 % IACS |
Half hard | Mid-strength condition for stamped/formed parts where 300 MPa-class yield is not enough. | 700 | 930 | 15 | 28 HRC | 2.4 % IACS |
Three-quarter hard | For flat springs and retainers needing high yield with only minimal further forming. | 850 | 1,070 | 10 | 33 HRC | 2.3 % IACS |
Full hard | Highest strength wire/strip condition; almost no remaining formability, bend only over generous radii. | 1,050 | 1,250 | 4 | 40 HRC | 2.3 % IACS |
What is S30530-SR?
S30530-SR is S30530 heat treated to SR — applied after heading/drawing to cut residual stress and SCC risk while keeping most of the cold-work strength. S30530-SR has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 22% and the elastic modulus is 193 GPa (28 Msi). S30530-SR has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). ANN is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Easy to machine — 50/100, better than 90% of stainless steel grades
- High strength — 620 MPa (89.9 ksi), better than 88% of stainless steel grades
Limitations
- High embodied carbon — 5.5 kg CO₂/kg, worse than 77% of stainless steel grades
- Limited ductility — 22%, worse than 75% of stainless steel grades
S30530-SR properties
Typical room-temperature values for S30530-SR; 23 are specific to this condition. Other listed values are S30530 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S30530-SR has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical13
S30530-SR has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 88% of stainless steel grades. Elongation at break is 22% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
S30530-SR is rated for continuous service to 425°C (797 °F). It conducts heat at 16.3 W/m·K (9.42 BTU/hr·ft·°F), better than 68% of stainless steel grades. Thermal expansion is 17.2 µm/m·K (9.56 µin/in·°F).
Electrical3
S30530-SR conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 58% of stainless steel grades.
Sustainability4
Producing a kilogram of S30530-SR takes about 57 MJ of energy and emits 5.5 kg of CO₂ — more than 62% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
S30530-SR's machinability is fair (50/100, better than 90% of stainless steel grades); weldability good (66/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S30530-SR
Is S30530 easy to machine?
Gummy and work-hardening like 304 but slightly kinder; use rigid setups, sharp positive-rake carbide, heavy coolant and constant feed to avoid glazing.
Can S30530 be welded?
Weldable by GTAW/GMAW/resistance methods with 308L filler, but the copper content raises hot-cracking sensitivity — keep heat input low and dilution controlled; not a grade chosen for welded assemblies.
Can S30530 be formed, bent or molded?
Its reason for existing: low work-hardening rate allows severe multi-blow cold heading, thread rolling and deep upsetting with far less die stress and inter-anneal than 304/302.
What surface finishes work on S30530?
Passivate per ASTM A967 or electropolish after forming; can be mechanically polished, tumbled or bright-annealed — no anodising.
S30530 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 |
|---|---|---|
| Clow carbon for maximum cold-heading ductility | ≤ 0.08 | 0.05 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.05 | — |
| Skept low; sulphur harms cold-heading | ≤ 0.03 | — |
| Cr | 17 – 19 | 18 |
| Ni | 8 – 10.5 | 9 |
| Cukey addition; lowers the work-hardening rate | 2 – 4 | 3 |
| Nheld low to avoid work hardening | ≤ 0.1 | — |
| Fe | balance | — |
S30530-SR — frequently asked
What is S30530-SR used for?
S30530-SR is typically used for cold-headed fasteners, screws and rivets, socket-head cap screws, thread-rolled studs and bolts, self-tapping screws and blind rivet bodies. In short: lowest work-hardening austenitic; dedicated cold-heading grade; fewer inter-anneals than 304.
What is the yield strength of S30530-SR?
S30530-SR has a typical yield strength of 620 MPa (89.9 ksi) and a tensile strength of 780 MPa (113 ksi) — stronger than 88% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is S30530-SR easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% of stainless steel grades). Gummy and work-hardening like 304 but slightly kinder; use rigid setups, sharp positive-rake carbide, heavy coolant and constant feed to avoid glazing.
Can S30530-SR be welded?
Yes — weldability is rated good (66/100). Weldable by GTAW/GMAW/resistance methods with 308L filler, but the copper content raises hot-cracking sensitivity — keep heat input low and dilution controlled; not a grade chosen for welded assemblies.
What surface finishes work on S30530-SR?
Passivate per ASTM A967 or electropolish after forming; can be mechanically polished, tumbled or bright-annealed — no anodising.
Can S30530-SR be formed, bent or molded?
Its reason for existing: low work-hardening rate allows severe multi-blow cold heading, thread rolling and deep upsetting with far less die stress and inter-anneal than 304/302.
What is the maximum service temperature of S30530-SR?
S30530-SR is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S30530-ANN and S30530-FH?
ANN is the default condition — standard supply condition for cold heading, riveting and multi-station forming — softest, maximum formability. FH: highest strength wire/strip condition; almost no remaining formability, bend only over generous radii. Yield strength is 240 MPa in ANN versus 1,050 MPa in FH.
Sources
- ASTM A493 — Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging — ASTM International (2023)
- ASTM A276/A493 UNS designation listings (SAE/ASTM Unified Numbering System for Metals and Alloys) — SAE International / ASTM (2017)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Cold-heading quality copper-bearing austenitic stainless wire (302HQ-type) data sheets — Sandvik / Suzuki Metal / Nippon Steel wire producers (2021)
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.