(G)X30Cr13、X40Cr14、X40Cr13

characteristic

Harder than 2Cr13 after quenching, for cutting tools, nozzles, valve seats, valves, etc.

 

chemical composition

Steel number	C≤	Si≤	Mn≤	S≤	P≤	Cr	Ni≤
X40CR14	0.16 0.40	1.00	1.00	0.030	0.040	12.00 14.00	0.60

 

Mechanical properties

Mechanical properties:

Tensile strength σb (MPa): quenching and tempering, ≥736

Conditional yield strength σ0.2 (MPa): quenching and tempering, ≥540

Elongation δ5 (%): quenching and tempering, ≥12

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

Impact work Akv (J): quenching and tempering, ≥29.4

Hardness: annealing, ≤ 235HB; quenching and tempering, ≥ 217HB

 

Heat treatment process

Heat treatment specifications: 1) annealing, slow cooling at 800 ～ 900 ℃ or rapid cooling at about 750 ℃; 2) quenching, 920 ～

Oil cooling at 980 ℃; 3) Tempering, fast cooling at 600 ～ 750 ℃.

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.