SUS431、14X17H2、20X17H2、Z15CN16-02

Characteristics and scope of application

431 series is a kind of steel with a good combination of strength and toughness in martensitic stainless steel. It has good corrosion resistance to oxidizing acids, most organic acids and aqueous solutions of organic salts. Generally suitable for the production of nitric acid, acetic acid, light industry, textile and other industries that require strong toughness and corrosion resistance, piston rods, pumps and other parts.

 

chemical composition

Steel number	C≤	Si≤	Mn≤	S≤	P≤	Cr	Mo
SUS431	0.20	1.00	1.00	0.030	0.040	15.00 17.00	1.25 2.50

 

Mechanical properties

Tensile strength σb (MPa): quenching and tempering, ≥785

Conditional yield strength σ0.2 (MPa): quenching and tempering, ≥589

Elongation δ5 (%): quenching and tempering, ≥15

Section shrinkage ψ (%): Quenching and tempering, ≥40

Impact work Akv (J): quenching and tempering, ≥39.2

Hardness: annealing, ≤ 302HB; quenching and tempering, ≥ 229HB

 

HHeat treatment specifications and metallographic structure

Heat treatment specifications: 1) about 750 quenching once; about 650 quenching once. 2) Quenching 1000 ~ 1050 oil cooling. 3) 630 ~ 700 rapid cooling.

Metallographic structure: the organization is characterized by martensite type.

 

Delivery status:

Generally, it is delivered in a heat-treated state, and the type of heat treatment is specified in the contract; if it is not specified, it is delivered in a non-heat-treated state.