420 ( 2Cr13 ) cold-drawn seamless stainless steel tube industrial grade applicable range: because the 2Cr13 quenched high hardness, good corrosion resistance and so commonly used for steam turbine blades. Physical properties: [ a ] the density of 2Cr13 : 7.75g / cm3 [ two ] 2Cr13 quenching hardness: General 2Cr13 quenching temperature in 980 ~ 1050 degrees, and 980 degrees C heating oil quenching hardness is significantly lower than 1050 DEG C heating oil quenching, 980 DEG C after oil quenching hardness is 45 ~ 50HRC, 1050 C oil quenching high hardness after 2HRC. But the 1050 DEG C after quenching the organization received grain coarse, brittleness. Recommendations for the use of 1000 degrees C. heating quenching can get better organization and hardness. Name: [ a ] standard 2Cr13 Chinese national standard GB / T 1220-1992 [ two ] 2Cr13 corresponds to the Japanese brands are: SUS420JI. The corresponding German brands are: X20Cr13. The United States is a grade: 420 corresponding.
Welding characteristics: 2Cr13 martensitic stainless steel, welding is to be preheated, and for Q235 welding of austenitic stainless steel without preheating, such as A302.A307. Welding control weld dilution rate, no swing welding, using small current. 2Cr13 welding welding consumables can choose: 1 atmospheric corrosion for G202, G207, 150-300 of preheating, welding and tempering 700-730 degree. 2 resistant organic acid and heat resistant selected: G211, 150-300 of preheating. 3 good plasticity: A102, A107, A202, A207, A302, A307, welding preheating, thick bulky preheating.
