Cov qauv siv: GB / T8162 seamless steel yeeb nkab rau cov qauv, GB / T8163 seamless steel yeeb nkab rau kev thauj mus los. 0420D thiab 0420E txhua yam khoom: tensile zog 520 ~ 680MPa,<16 service strength 2420MPa, 16mm~30mm service strength 2400, 230mm Yield strength 2380MPa Impact test Q420D minus 20C Impact energy 234, impact test Q420E minus 40C Impact energy 227 :0.20, chromium: <0.30, nickel: <0.50, copper: 0.20, nitrogen: 0.015, :0.20, aluminum, 20.015.Q420E seamless steel pipe chemical composition: carbon: 0.20, silicon: 0.50, :1.70, phosphorus: 0.025, Sulfur: 0.020, : 0.07, : 0.20, : 0.20 Chromium: <0.30, Nickel: <0.50, Copper: <0.20, Nitrogen: 0.015, : 0.20, Aluminum, 20.015. Steel refining method: Steel should be processed by electric arc furnace Refining outside the furnace or gas converter plus outside refining method. After negotiation between the supply and demand parties, other methods with higher requirements can also be used to treat refining. When the demander requires a certain refining method, it should be stated in the contract.
Txoj kev tsim cov yeeb nkab: Cov yeeb nkab kuj tuaj yeem tsim los ntawm kev nruam casting, pwm casting lossis kub dov.
Nruam cam khwb cia kav yuav tsum tau ua raws li cov kev cai ntawm YB/T 4149; Cov kav dej kub yuav tsum ua raws li cov cai ntawm YB / T 5221 lossis YB / T 5222; pwm cam khwb cia kav kuj tuaj yeem xa mus rau cov kev cai ntawm cov kav dej kub (forged).
