Stainless Steel S30530
UNS S30530
S30530 is a copper-bearing 18Cr-9Ni austenitic stainless engineered for a low work-hardening rate so that severe cold-heading operations can be completed with fewer intermediate anneals.
Reference datasheet — S30530 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the ANN condition
S30530 tempers and conditions
S30530 is supplied in 7 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
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 |
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 |
Supply forms, finishes and certifications
Ways S30530 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
AP | Annealed and pickled / coated CHQ wire | Surface finish |
What is S30530?
S30530 is a copper-bearing 18Cr-9Ni austenitic stainless engineered for a low work-hardening rate so that severe cold-heading operations can be completed with fewer intermediate anneals. Annealed material runs about 240 MPa yield, 550 MPa tensile, 55 % elongation and 140 HB (76 HRB), with a maximum service temperature of 700 °C; it is supplied mainly as cold-heading wire and bar in ANN, AP, CD, 1/4H–FH and stress-relieved conditions. The copper addition increases hot-cracking sensitivity, so it is not a grade chosen for welded assemblies — use 304/304L where welding governs. S30530 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). S30530 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 193 GPa (28 Msi).
What is S30530 used for?
- Cold-headed fasteners
- Screws and rivets
- Socket-head cap screws
- Thread-rolled studs and bolts
- Self-tapping screws
- Blind rivet bodies
- Formed washers and clips
Advantages
- Forms and bends easily — 95/100, better than 99% of stainless steel grades
- Ductile — tolerates forming and impact — 55%, better than 97% of stainless steel grades
Limitations
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
- High embodied carbon — 5.5 kg CO₂/kg, worse than 77% of stainless steel grades
S30530 properties
Typical room-temperature values for S30530-ANN; bars are the position among stainless steel grades.
Physical3
S30530 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 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
S30530 is rated for continuous service to 700°C (1,292 °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 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 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's machinability is fair (42/100, better than 79% of stainless steel grades); weldability very good (70/100); formability excellent (95/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. S30530 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S30530
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.
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 |
What surface finishes work on S30530?
Passivate per ASTM A967 or electropolish after forming; can be mechanically polished, tumbled or bright-annealed — no anodising.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
How much does S30530 cost?
S30530 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
S30530 — frequently asked
What is S30530 used for?
S30530 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?
S30530 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is S30530 easy to machine?
Not especially — machinability is rated fair (42/100, better than 79% 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 be welded?
Yes — weldability is rated very good (70/100). 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?
Passivate per ASTM A967 or electropolish after forming; can be mechanically polished, tumbled or bright-annealed — no anodising.
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 is the maximum service temperature of S30530?
S30530 is rated for continuous use to about 700°C (1,292 °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.
How much does S30530 cost?
S30530 is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.