3Cr13 stainless steel: 3Cr13 Standard: GB / T 1220-1992 ● Features and Scope: Common martensitic stainless steel grades have 1Cr13,3Cr13 etc., due to the higher carbon content, it has a high strength, hardness and wear resistance but somewhat less corrosion resistance, high mechanical performance requirements for corrosion performance requirements in general on the part of some, such as springs, turbine blades, for cutting tools, nozzles, valve seats, valve / hydraulic press valve. Such steel is quenched, tempered use. ● Chemical Composition: Carbon C: 0.26 ~ 0.35 3Cr13 stainless steel silicon Si: ≤1.00 Mn Mn: ≤1.00 sulfur S: ≤0.030 Phosphorus P: ≤0.035 Chromium Cr: 12.00 ~ 14.00 Ni: to allow contains ≤0.60 ● Mechanical Properties: Anti- tensile strength σb (MPa): quenching and tempering, ≥735 Conditions yield strength σ0.2 (MPa): quenching and tempering, ≥540 elongation δ5 (%): quenching and tempering, ≥12 reduction of area ψ (%) : quenching and tempering, ≥40 impact energy Akv (J): quenching and tempering, ≥24 Hardness: annealing, ≤235HB; quenching and tempering, ≥217HB ● heat treatment and microstructure specifications: Heat treatment specifications: 1) annealing, 800 ~ 900 ℃ slow cooling or rapid cooling to about 750 ℃; 2) quenching, 920 ~ 980 ℃ oil cooling; 3) tempering, 600 ~ 750 ℃ ??rapid cooling. Microstructure: Organizing for the martensite type.