UNS S40300 Steels Plates

Parts should be heated uniformly to 1200/1400ºF (650/760ºC) and air cooled. Optimum machinability is obtained by a lowering of the annealing temperature to give a slightly higher hardness. For maximum softness heat to 1500/1650ºF (815/900ºC) and slow furnace cool to give approximately 155 BHN. Maximum softness may be required for subsequent cold forming, for cold heading for instance.

Stainless Steel – SUS403, UNS S40300, 1.4024, AISI Type 403

sus403 Chemical composition

Fe, <0.15% C, 11.5-13.5% Cr, >0.75% Ni, <1.0% Mn, <0.5% Si, <0.04% P, <0.03% S

Mechanical properties:

• Tensile strength σb (MPa): ≥485

• Conditional yield strength σ0.2 (MPa): ≥205

• Elongation δ5 (%): ≥25

• Hardness: ≤217HB; ≤96HRB

Element	Weight %
C	0.15
Mn	1.00
Si	0.50
Cr	11.5-13.0
P	0.04
S	0.03

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