Standard ferritic stainless steel 430. Non-hardenable, magnetic, good corrosion resistance. For automotive trim, kitchen equipment and washing machine drums.
Standards
| Standard Body |
Designation |
Country |
| EN |
X6Cr17 / 1.4016 |
EU |
| AISI/SAE |
430 |
USA |
| ASTM |
A240 Type 430 |
USA |
| UNS |
S43000 |
USA |
| JIS |
SUS430 |
Japan |
| GOST |
12H17 (12Kh17) |
Russia |
| BS EN |
430S17 |
UK |
| GB |
1Cr17 |
China |
| JUS |
C.4146 |
Yugoslavia |
Composition (wt.%)
| Element |
Symbol |
Min % |
Max % |
Typical % |
| Carbon |
C |
— |
0.080 |
0.050 |
| Silicon |
Si |
— |
1.000 |
0.400 |
| Manganese |
Mn |
— |
1.000 |
0.500 |
| Chromium |
Cr |
16.000 |
18.000 |
17.000 |
Physical
Melting Range
1425 – 1510
°C
Thermal Conductivity
26
W/mK
Thermal Expansion
10.5
×10⁻⁶/K
Machinability
| Rating |
65.0% (B1112=100%) |
| Turning HSS |
45.0 m/min |
| Turning Carbide |
195.0 m/min |
| Surface Finish |
Ra 0.8-3.2 um |
| Coolant |
Soluble oil 5-8%; dry for light cuts |
Mechanical
| Condition |
Rm (MPa) | Re (MPa) | A (%) |
HB | HRC | KV (J) | E (GPa) |
| Annealed (+A) |
430 – 630 |
≥260 |
≥22 |
≤183 |
— |
— |
200 |
| Cold Rolled (skin-passed) (CR) |
480 – 680 |
≥310 |
≥16 |
≤200 |
— |
— |
200 |
Heat Treatment
| Process |
Temperature |
Medium |
Duration |
Hardness After |
| Annealing |
750 – 900°C |
Furnace |
1-3 h |
<=HB 183 |
| Stress Relieving |
160 – 180°C |
Oven |
1-2 h |
Minimal |
| NOT hardenable by quenching |
— |
Ferritic — cannot be hardene |
N/A |
N/A |
Applications
Appliances: Washing machine drums, dishwasher inner liners, refrigerator cladding, oven panels.
Architecture: Interior wall cladding, elevator cab panels, escalator balustrades.
Automotive: Exhaust trim strips, bright trim rings and decorative automotive components.
Foodservice: Food processing equipment for dry and slightly moist environments.
Notes
Weldability: 430 sensitises in HAZ — intergranular corrosion after welding. For welded assemblies use 439 (Ti-stabilised) or 444 (Mo+Ti). If welding 430, PWHT at 750-800 C is possible but impractical for most fabrications.
430 vs 304: 430: 40-50% lower cost (no Ni), magnetic, slightly lower corrosion resistance. 304: better formability, better weld, non-magnetic, better outdoor corrosion. Use 430 for indoor appliances and dry environments; 304 for food contact and outdoor.