Stainless Steel 430 · temper · default condition
Stainless Steel 430 Annealed
Properties of the Annealed condition, compared with the other 430 tempers.
Default stocked condition: maximum ductility for forming, bending and welding.
What is 430 Annealed?
430 Annealed is 430 in the Annealed temper — default stocked condition: maximum ductility for forming, bending and welding. 430 Annealed has a yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi). 430 Annealed has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Advantages
- Conducts heat well — 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades
- Easy to machine — 50/100, better than 90% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- High service temperature — 815°C (1,499 °F), better than 77% of stainless steel grades
Limitations
- Low fracture toughness — 70 MPa·√m (63.7 ksi·√in), worse than 87% of stainless steel grades
430 Annealed properties
Typical room-temperature values for 430 Annealed — 10 properties are specific to this condition; the rest are grade-level values shared by every 430 temper. Each bar shows where the value sits among the stainless steel grades in FabDigit's library — further right is higher.
Physical3
430 Annealed has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical15
430 Annealed has a yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
430 Annealed is rated for continuous service to 815°C (1,499 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
430 Annealed conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 430 Annealed takes about 40 MJ of energy and emits 3.8 kg of CO₂ — less than 97% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
430 Annealed's machinability is fair (50/100, better than 90% of stainless steel grades); weldability good (60/100); formability good (65/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 430 tempers and conditions
430 is also supplied in 7 other conditions. The full side-by-side table is on the 430 overview.
- AnnealedDefaultDefault stocked condition: maximum ductility for forming, bending and welding.310 MPa yield · 155 HB
Working with 430 Annealed
Is 430 easy to machine?
Machines more freely than 304 (≈54 % of 1212) with less gumming; use sharp carbide, positive rake, rigid setups and flood coolant — for heavy turning specify free-machining 430F instead.
Can 430 be welded?
Weldable by GTAW/GMAW/resistance in thin gauges; keep heat input low, avoid preheat above ~200 °C, use 430/309L filler and post-weld anneal 760–815 °C on thicker sections to restore ductility.
Can 430 be formed, bent or molded?
Good for bending, roll forming and shallow drawing; springback and ridging (roping) are higher than 304 and severe deep draws should be redirected to 304 or a stabilised ferritic (439/441).
What surface finishes work on 430?
Polishes and buffs to bright trim quality and takes PVD/paint well; passivate after machining or welding and avoid iron contamination and chloride-bearing cleaners to prevent rust staining.
430 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 |
|---|---|---|
| CASTM A240 ≤0.12; EN 1.4016 ≤0.08 | ≤ 0.12 | 0.05 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.5 |
| P | ≤ 0.04 | 0.03 |
| SEN 1.4016 ≤0.015 | ≤ 0.03 | 0.01 |
| Cr | 16 – 18 | 17 |
| Niresidual only (ASTM A240) | ≤ 0.75 | 0.3 |
| NEN 10088 limit | ≤ 0.04 | 0.03 |
| Fe | balance | — |
430 Annealed — frequently asked
What is 430 Annealed used for?
430 Annealed is typically used for refrigerator and appliance panels, automotive trim strips, kitchenware and sinks, dishwasher and oven interiors, heat exchanger components and furnace fixtures and baffles. In short: economical magnetic stainless.
What is the yield strength of 430 Annealed?
430 Annealed has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 63% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is 430 Annealed easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% of stainless steel grades). Machines more freely than 304 (≈54 % of 1212) with less gumming; use sharp carbide, positive rake, rigid setups and flood coolant — for heavy turning specify free-machining 430F instead.
Can 430 Annealed be welded?
Yes — weldability is rated good (60/100). Weldable by GTAW/GMAW/resistance in thin gauges; keep heat input low, avoid preheat above ~200 °C, use 430/309L filler and post-weld anneal 760–815 °C on thicker sections to restore ductility.
What surface finishes work on 430 Annealed?
Polishes and buffs to bright trim quality and takes PVD/paint well; passivate after machining or welding and avoid iron contamination and chloride-bearing cleaners to prevent rust staining.
Can 430 Annealed be formed, bent or molded?
Good for bending, roll forming and shallow drawing; springback and ridging (roping) are higher than 304 and severe deep draws should be redirected to 304 or a stabilised ferritic (439/441).
What is the maximum service temperature of 430 Annealed?
430 Annealed is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 430 Annealed and 430-CD?
Annealed is the default condition — default stocked condition: maximum ductility for forming, bending and welding. CD: cold-finished bar for shafts, fasteners and machined parts needing tighter tolerance and higher strength. Yield strength is 310 MPa in Annealed versus 480 MPa in CD.
Can FabDigit make parts in 430 Annealed?
Yes — 430 Annealed is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- ASTM A276/A276M — Stainless Steel Bars and Shapes — ASTM International (2023)
- EN 10088-1/-2 — Stainless steels: grades and technical delivery conditions (1.4016) — CEN (2014)
- GB/T 3280 / GB/T 20878 (1Cr17, 10Cr17) — SAC (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Outokumpu Stainless Steel Handbook / 4016 datasheet — Outokumpu (2020)
- AK Steel / Cleveland-Cliffs 430 Stainless Steel Data Sheet — Cleveland-Cliffs (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.