JIS Seamless Stainless Steel Tube Pipe (SUS420J2)

Characteristics of SUS420J1:
Good corrosion resistance and good high temperature oxidation resistance up to 700 C. Excellent mechanical characteristics. Main applications: Threaded pipe for oil well
Chemical composition:
C: 0.16~0.25
Si: ≤ 1.00
Mn: ≤ 1.00
S: ≤ 0.030
P: ≤ 0.035
Cr: 12.00~14.00
Ni: May contain≤ 0.60
Mechanical Properties:
Tensile strength σ B (MPa): Quenching and tempering, ≥ 635
Conditions yield strength σ 0.2 (MPa): Quenching and tempering, ≥ 440
Elongation δ 5 (%): Quenching and tempering, ≥ 20
Section shrinkage (%): Quenching and tempering, ≥ 50
Impact Energy Akv (J): Quenching and tempering, ≥ 63
Hardness: Annealing, ≤ 223HB; Quenching and tempering, ≥ 192HB
1. Heat treatment and microstructure specifications:
Heat treatment specifications: 1)Annealing, 800~900° C Slow cooling or rapid cooling at about 750 ° C; 2) quenching, 920 ~ 980° C oil
Cold; 3) Tempering, 600 ~ 750 ° C fast-cooling.
Microstructure: Organizing for the martensitic.
2. Delivery status: Generally heat treatment delivery, the treatment types specified in the contract; Not indicated, according to the delivery without heat treatment.