X3CrNiMo18-12-3、1.4449、X5CrNiMo1713、X5CrNiMo18 15

Characteristics and scope of application:
The molybdenum content in 1.4449 stainless steel is slightly higher than that of 1.4401 stainless steel. Characteristics: Similar to 1.4404, but with added molybdenum metal to improve corrosion resistance. HB≤195, 1.4449 is used in chemical ships, chemical products Reactor and other chemical equipment that require high corrosion resistance.

chemical composition:

Grade	C≤	Si≤	Mn≤	S≤	P≤	Cr	Ni	Mo
1.4449	0.08	1.00	2.00	0.030	0.045	18.00 20.00	11.00 15.00	3.00 4.00

 

Mechanical properties:

Tensile strength σb (MPa): ≥520

Conditional yield strength σ0.2 (MPa): ≥206

Elongation δ5 (%): ≥40

Section shrinkage ψ (%): ≥60

Hardness: ≤187HB; ≤90HRB; ≤200HV

 

Heat treatment specifications and metallographic structure:

Heat treatment specifications:

Solution: 1010 ～ 1150 ℃, fast cooling.

Microstructure:

The organization is characterized by austenite type.