X6Cr17 (430) — EngMats

Description

X6Cr17 (EN 1.4016 / AISI 430) per EN 10088. Ferritic Cr stainless — non-hardenable, magnetic, lower thermal expansion than austenitic grades. Good corrosion resistance in atmospheric environments and mild acids. Standard for automotive exhaust trim, dishwasher tanks, washing machine drums, kitchen equipment and architectural cladding. Lower cost than 304.

Key Properties — Annealed

Rm (Tensile Strength)

430 – 630

MPa

Re / Rp0.2 (Yield)

260

MPa

A₅ (Elongation)

≥ 22.0

Hardness

— – 183

E (Young's Modulus)

200

GPa

Density

7.74

g/cm³

Main Designations (9)

Standard Body	Designation	Country / Region	Note
EN	X6Cr17 / 1.4016	EU
AISI/SAE	430	USA
ASTM	A240 Type 430	USA
UNS	S43000	USA (UNS)
JIS	SUS430	Japan
GOST	12H17 (12Kh17)	Russia
BS EN	430S17	UK
GB	1Cr17	China
JUS	C.4146	Yugoslavia	Feritni inox 17% Cr; JUS C.B2.020

Standards (9)

#	Standard Body	Designation	Country / Region	Note
1	EN	X6Cr17 / 1.4016	EU	—
2	AISI/SAE	430	USA	—
3	ASTM	A240 Type 430	USA	—
4	UNS	S43000	USA (UNS)	—
5	JIS	SUS430	Japan	—
6	GOST	12H17 (12Kh17)	Russia	—
7	BS EN	430S17	UK	—
8	GB	1Cr17	China	—
9	JUS	C.4146	Yugoslavia	Feritni inox 17% Cr; JUS C.B2.020

All values in wt.%

Carbon

≤ 0.0800

Silicon

≤ 1.0000

Manganese

≤ 1.0000

Chromium

16.0000 – 18.0000

Element	Symbol	Min %	Max %	Typical %
Carbon	C	—	0.0800	0.0500
Silicon	Si	—	1.0000	0.4000
Manganese	Mn	—	1.0000	0.5000
Chromium	Cr	16.0000	18.0000	17.0000

Mechanical Properties

Condition	Code	Rm min MPa	Rm max MPa	Re min MPa	Re max MPa	A₅ min %	Z %	KV J	HB min	HB max	HRC min	HRC max	E GPa
Annealed	+A	430	630	260	—	22.0	—	—	—	183	—	—	200.0
Cold Rolled (skin-passed)	CR	480	680	310	—	16.0	—	—	—	200	—	—	200.0

Physical Properties

Density

7.740

g/cm³

Melting Point

1425–1510

°C

Young's Modulus

200.0

GPa

Poisson's Ratio

0.280

—

Thermal Conductivity

26.0

W/m·K

Thermal Expansion

10.50

×10⁻⁶ /K

Specific Heat

460

J/kg·K

Electrical Resistivity

0.6000

µΩ·m

Magnetic

Yes

Heat Treatment

Annealing

Temperature:750°C – 900°C

Medium:Furnace

Duration:1-3 h

Cooling:Air cool or furnace cool

Hardness After:<=HB 183

Standard delivery. Slow cool through 475 C range avoids embrittlement.

Stress Relieving

Temperature:160°C – 180°C

Medium:Oven

Duration:1-2 h

Cooling:Air cool

Hardness After:Minimal

After cold forming.

NOT hardenable by quenching

Medium:Ferritic — cannot be hardened by Q+T

Duration:N/A

Cooling:N/A

Hardness After:N/A

Use 410/420 for hardenable stainless.

Machinability

Machinability Rating

relative to AISI B1112 = 100%

65.0%

Moderate

Turning Speed (HSS)

m/min

Turning Speed (Carbide)

195

m/min

Feed Rate (Turning)

0.220

mm/rev

Drilling Speed (HSS)

m/min

Milling Speed (Carbide)

198

m/min

Coolant	Soluble oil 5-8%; dry for light cuts
Chip Formation	Short-medium chips; easier than 304
Tool Material	Carbide P20/M20; HSS M2 acceptable
Surface Finish	Ra 0.8-3.2 um

Good machinability. Similar to 303 ferritic.

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.

Technical 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.