Stainless Steel 430
AISI/SAE 430 · UNS S43000 · EN 1.4016, X6Cr17 · JIS SUS430 · GB 1Cr17, 10Cr17
430 (UNS S43000 / EN 1.4016 / GB 1Cr17) is the workhorse straight-chromium ferritic stainless steel, containing ~17 % Cr with no deliberate nickel addition, so it is ferromagnetic, cheaper and far less price-volatile than 304.
Values for the Annealed condition
430 tempers and conditions
430 is supplied in 5 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault sheet/plate/bar, softened 780–830 °C | Default stocked condition: maximum ductility for forming, bending and welding. | 310 | 500 | 30 | 155 HB | — |
Quarter hard | Light cold work for extra stiffness in flat parts while retaining some bendability. | 470 | 620 | 12 | 14 HRC | 2.9 % IACS |
Cold drawn | Cold-finished bar for shafts, fasteners and machined parts needing tighter tolerance and higher strength. | 480 | 585 | 20 | 10 HRC | 2.9 % IACS |
Half hard | Use for flat springs, clips and stiff panels where only gentle forming is required. | 590 | 720 | 6 | 24 HRC | 2.9 % IACS |
heavily cold rolled strip | Maximum as-rolled strength/stiffness for blanked flat parts; essentially not formable and prone to edge cracking. | 700 | 820 | 3 | 29 HRC | 2.8 % IACS |
Supply forms, finishes and certifications
Ways 430 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
2B | Cold Rolled Annealed 2B | Surface finish |
BA | Bright annealed cold rolled sheet | Surface finish |
HRAP | Hot Rolled Annealed & Pickled | Surface finish |
What is 430?
430 (UNS S43000 / EN 1.4016 / GB 1Cr17) is the workhorse straight-chromium ferritic stainless steel, containing ~17 % Cr with no deliberate nickel addition, so it is ferromagnetic, cheaper and far less price-volatile than 304. It is chosen for decorative trim, appliance panels, kitchenware, heat-exchanger and furnace parts up to ~815 °C thanks to good atmospheric and oxidation resistance plus excellent polishability. Limits are modest chloride/pitting resistance, poor deep-drawability compared with austenitics (ridging/roping), a room-temperature-to-sub-zero ductile-to-brittle transition, and welds that coarsen and embrittle unless the section is thin or post-weld annealed. 430 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). 430 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).
What is 430 used for?
- Refrigerator and appliance panels
- Automotive trim strips
- Kitchenware and sinks
- Dishwasher and oven interiors
- Heat exchanger components
- Furnace fixtures and baffles
- Decorative architectural trim
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 83% of stainless steel grades
430 properties
Typical room-temperature values for 430-Annealed; bars are the position among stainless steel grades.
Physical3
430 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 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 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 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 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'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.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 430 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 430
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).
Manufacturability
The process limits FabDigit's quote engine applies to 430. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better50 / 100 |
|---|---|
| ISO material group | M.4 |
| Cutting speed (rough / finish) | 140 / 170 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1.5 mm |
| Drill depth limit | 4× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better65 / 100 |
|---|---|
| Weldability | Better60 / 100 |
| Bendable | Yes |
| Minimum bend radius | 1× thickness |
| Sheet thickness range | 0.5 – 3 mm |
| Spring-back | High |
| Welding processes | TIG, MIG, SPOT, SEAM, LASER |
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 |
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.
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).
Plating
Organic Coating
CVD Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 430 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S43000
- EN / DIN / Werkstoff-Nr.
- 1.4016X6Cr17
- GB (China)
- 1Cr1710Cr17
- JIS
- SUS430
- Also called
- ferritic stainless
How much does 430 cost?
430 is a standard-cost stainless steel ($$), cheaper than about 62% 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.
430 — frequently asked
What is 430 used for?
430 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?
430 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 5 listed tempers.
Is 430 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 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?
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 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?
430 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.
How much does 430 cost?
430 is a standard-cost stainless steel ($$), cheaper than about 62% 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.
Can FabDigit make parts in 430?
Yes — 430 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; 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.