S42000 Standard: GB / T 1220-1992
Features and application:
Quenched state, high hardness, good corrosion resistance. For turbine blades.
S42000 density 7.75g/m3
S42000 quenching hardness:
General S42000 quenching temperature 980 ~ 1050 ℃, 980 ℃ taken when heating oil quenched hardness was significantly lower than 1050 ℃ heating oil quenched, 980 ℃ oil-quenched hardness of 45 ~ 50HRC, 1050 ℃ higher hardness after oil quenching 2HRC. 1050 ℃, but the organization has been quenched coarse grains, brittleness. Recommend the use of 1000 ℃ Hardening can get better and hardness.
S42000 martensitic stainless steel, welded to preheat.
Control of welding seam dilution rate, does not swing welding, using a smaller current.
S42000 welding consumables can be used:
1 atmospheric corrosion resistance election G202, G207, to be warm 150-300 degrees, 700-730 degrees tempering after welding;
(2) and heat-resistant organic acid selected: G211, to be warm 150-300 degrees;
3 good plasticity: A102, A107, A202, A207, A302, A307, welding preheat, preheat large thick.
Chemical composition:
Carbon C: 0.16 ~ 0.25
Si Si: ≤ 1.00
Manganese Mn: ≤ 1.00
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 12.00 ~ 14.00
Ni: to allow containing ≤ 0.60
Mechanical properties:
Tensile strength σb (MPa): quenching and tempering, ≥ 635
Conditions yield strength σ0.2 (MPa): quenching and tempering, ≥ 440
Elongation δ5 (%): quenching and tempering, ≥ 20
Reduction of area ψ (%): quenching and tempering, ≥ 50
Impact energy Akv (J): quenching and tempering, ≥ 63
Hardness: Annealed, ≤ 223HB; quenching and tempering, ≥ 192HB
Heat treatment and microstructure specifications:
Heat treatment specifications:
1) annealing, 800 ~ 900 ℃ slow cooling or rapid cooling of about 750 ℃??;
2) quenching, 920 ~ 980 ℃ oil cooling;
3) tempering, 600 ~ 750 ℃ ??fast-cooling.
Microstructure: Organizing for the martensitic type.
Delivery status:
Generally heat treatment delivery, the treatment types specified in the contract; not indicated, according to the non-heat treatment delivery
Features and application:
Quenched state, high hardness, good corrosion resistance. For turbine blades.
S42000 density 7.75g/m3
S42000 quenching hardness:
General S42000 quenching temperature 980 ~ 1050 ℃, 980 ℃ taken when heating oil quenched hardness was significantly lower than 1050 ℃ heating oil quenched, 980 ℃ oil-quenched hardness of 45 ~ 50HRC, 1050 ℃ higher hardness after oil quenching 2HRC. 1050 ℃, but the organization has been quenched coarse grains, brittleness. Recommend the use of 1000 ℃ Hardening can get better and hardness.
S42000 martensitic stainless steel, welded to preheat.
Control of welding seam dilution rate, does not swing welding, using a smaller current.
S42000 welding consumables can be used:
1 atmospheric corrosion resistance election G202, G207, to be warm 150-300 degrees, 700-730 degrees tempering after welding;
(2) and heat-resistant organic acid selected: G211, to be warm 150-300 degrees;
3 good plasticity: A102, A107, A202, A207, A302, A307, welding preheat, preheat large thick.
Chemical composition:
Carbon C: 0.16 ~ 0.25
Si Si: ≤ 1.00
Manganese Mn: ≤ 1.00
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.035
Chromium Cr: 12.00 ~ 14.00
Ni: to allow containing ≤ 0.60
Mechanical properties:
Tensile strength σb (MPa): quenching and tempering, ≥ 635
Conditions yield strength σ0.2 (MPa): quenching and tempering, ≥ 440
Elongation δ5 (%): quenching and tempering, ≥ 20
Reduction of area ψ (%): quenching and tempering, ≥ 50
Impact energy Akv (J): quenching and tempering, ≥ 63
Hardness: Annealed, ≤ 223HB; quenching and tempering, ≥ 192HB
Heat treatment and microstructure specifications:
Heat treatment specifications:
1) annealing, 800 ~ 900 ℃ slow cooling or rapid cooling of about 750 ℃??;
2) quenching, 920 ~ 980 ℃ oil cooling;
3) tempering, 600 ~ 750 ℃ ??fast-cooling.
Microstructure: Organizing for the martensitic type.
Delivery status:
Generally heat treatment delivery, the treatment types specified in the contract; not indicated, according to the non-heat treatment delivery
