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["国标GB/T3077-1999标准内容"]
["组","序号","牌号","试样毛坯尺寸/mm","热处理",{"$nulls":9},"力学性能",{"$nulls":5},"钢材退火或高温回火供应状态布氏硬度HBS100/3000≤"]
[{"$nulls":4},"淬火",{"$nulls":5},"回火",{"$nulls":3},"抗拉强度ób/MPa",null,"屈服点ós/MPa","断后伸长率δ5(%)","断面收缩率￠(%)","冲击吸收功Aku2/J"]
[{"$nulls":4},"加热温度/°C",{"$nulls":3},"冷却剂",null,"加热温度/℃",null,"冷却剂"]
[{"$nulls":4},"第一次淬火",null,"第二次淬火"]
[{"$nulls":14},"≥"]
["Mn",1,"20Mn2",15,850,{"$nulls":3},"水、油",null,200,null,"水、空",null,785,null,590,10,40,47,187]
[{"$nulls":4},880,{"$nulls":3},"水、油",null,440,null,"水、空"]
[null,2,"30Mn2",25,840,{"$nulls":3},"水",null,500,null,"水",null,785,null,635,12,45,63,207]
[null,3,"35Mn2",25,840,{"$nulls":3},"水",null,500,null,"水",null,835,null,685,12,45,55,207]
[null,4,"40Mn2",25,840,{"$nulls":3},"水、油",null,540,null,"水",null,885,null,735,12,45,55,217]
[null,5,"45Mn2",25,840,{"$nulls":3},"油",null,550,null,"水、油",null,885,null,735,10,45,47,217]
[null,6,"50Mrd",25,820,{"$nulls":3},"油",null,550,null,"水、油",null,930,null,785,9,40,39,229]
["MnV",7,"20MnV",15,880,{"$nulls":3},"水、油",null,200,null,"水、空",null,785,null,590,10,45,55,187]
["SiMn",8,"27SiMn",25,920,{"$nulls":3},"水",null,450,null,"水、油",null,980,null,835,12,40,39,217]
[null,9,"35SiMn",25,900,{"$nulls":3},"水",null,570,null,"水、油",null,885,null,735,15,45,47,229]
[null,10,"42Sibin",25,880,{"$nulls":3},"水",null,590,null,"水",null,885,null,735,15,40,47,229]
["SiMnMoV",11,"20SiMn2MoV","试样",900,{"$nulls":3},"油",null,200,null,"水、空",null,1380,null,null,10,45,55,269]
[null,12,"25SiMn2MoV","试样",900,{"$nulls":3},"油",null,200,null,"水、空",null,1470,null,null,10,40,47,269]
[null,13,"37SiMn2MoV",25,870,{"$nulls":3},"水、油",null,650,null,"水、空",null,980,null,835,12,50,63,269]
["B",14,"40B",25,840,{"$nulls":3},"水",null,550,null,"水",null,785,null,635,12,45,55,207]
[null,15,"45B",25,840,{"$nulls":3},"水",null,550,null,"水",null,835,null,685,12,45,47,217]
[null,16,"50B",20,840,{"$nulls":3},"油",null,600,null,"空",null,785,null,540,10,45,39,207]
["MnB",17,"40MnB",25,850,{"$nulls":3},"油",null,500,null,"水、油",null,980,null,785,10,45,47,207]
[null,18,"45MnB",25,840,{"$nulls":3},"油",null,500,null,"水、油",null,1030,null,835,9,40,39,217]
["MnMoB",19,"20MnMoB",15,880,{"$nulls":3},"油",null,2000,null,"油、空",null,1080,null,885,10,50,55,207]
["MnVB",20,"15MnVB",15,860,{"$nulls":3},"油",null,200,null,"水、空",null,885,null,635,10,45,55,207]
[null,21,"20MnVB",15,860,{"$nulls":3},"油",null,200,null,"水、空",null,1080,null,885,10,45,55,207]
[null,22,"40MnVB",25,850,{"$nulls":3},"油",null,520,null,"水、油",null,980,null,785,10,45,47,207]
["MnTiB",23,"20MnTiB",15,860,{"$nulls":3},"油",null,200,null,"水、空",null,1130,null,930,10,45,55,187]
[null,24,"25MnTiBRE","试样",860,{"$nulls":3},"油",null,200,null,"水、空",null,1380,null,null,10,40,47,229]
["Cr",25,"15Cr",15,880,null,"780～820",null,"水、油",null,200,null,"水、空",null,735,null,490,11,45,55,179]
["钢组","序号","牌号","试样毛坯尺寸/mm","热处理",{"$nulls":9},"力学性能",{"$nulls":5},"钢材退火或高温回火供应状态布氏硬度HBS100/3000≤"]
[{"$nulls":4},"淬火",{"$nulls":5},"回火",{"$nulls":3},"抗拉强度ób/MPa",null,"屈服点ós/MPa","断后伸长率δ5(%)","断面收缩率￠(%)","冲击吸收功Aku2/J"]
[{"$nulls":4},"加热温度/°C",{"$nulls":3},"冷却剂",null,"加热温度/℃",null,"冷却剂"]
[{"$nulls":4},"第一次淬火",null,"第二次淬火"]
[{"$nulls":14},"≥"]
[null,26,"15CrA",15,880,null,"770～820",null,"水、油",null,180,null,"油、空",null,685,null,490,12,45,55,179]
[null,27,"20Cr",15,880,null,"780～820",null,"水、油",null,200,null,"水、空",null,835,null,540,10,40,47,179]
["Cr",28,"30Cr",25,860,{"$nulls":3},"油",null,500,null,"水、油",null,885,null,685,11,45,47,187]
[null,29,"35Cr",25,860,{"$nulls":3},"油",null,500,null,"水、油",null,930,null,735,11,45,47,207]
[null,30,"40Cr",25,850,{"$nulls":3},"油",null,520,null,"水、油",null,980,null,785,9,45,47,207]
[null,31,"45Cr",25,840,{"$nulls":3},"油",null,520,null,"水、油",null,1030,null,835,9,40,39,217]
[null,32,"50Cr",25,830,{"$nulls":3},"油",null,520,null,"水、油",null,1080,null,930,9,40,39,229]
["CrSi",33,"38CrSi",25,900,{"$nulls":3},"油",null,600,null,"水、油",null,980,null,835,12,50,55,255]
["CrMo",34,"12CrMo",30,900,{"$nulls":3},"空",null,650,null,"空",null,410,null,265,24,60,110,179]
[null,35,"15CrMo",30,900,{"$nulls":3},"空",null,650,null,"空",null,440,null,295,22,60,94,179]
[null,36,"20CrMo",15,880,{"$nulls":3},"水、油",null,500,null,"水、油",null,885,null,685,12,50,78,197]
[null,37,"30CrMo",25,880,{"$nulls":3},"水、油",null,540,null,"水、油",null,930,null,785,12,50,63,229]
[null,38,"30CrMoA",15,880,{"$nulls":3},"油",null,540,null,"水、油",null,930,null,735,12,50,71,229]
[null,39,"35CrMo",25,850,{"$nulls":3},"油",null,550,null,"水、油",null,980,null,835,12,45,63,229]
[null,40,"42CrMo",25,850,{"$nulls":3},"油",null,560,null,"水、油",null,1080,null,930,12,45,63,217]
["CrMoV",41,"12CrMoV",30,970,{"$nulls":3},"空",null,750,null,"空",null,440,null,225,22,50,78,241]
["CrMoV",42,"35CrMoV",25,900,{"$nulls":3},"油",null,630,null,"水、油",null,1080,null,930,10,50,71,241]
[null,43,"12Cr1MoV",30,970,{"$nulls":3},"空",null,750,null,"空",null,490,null,245,22,50,71,179]
[null,44,"25Cr2MoVA",25,900,{"$nulls":3},"油",null,640,null,"空",null,930,null,785,14,55,63,241]
[null,45,"25Cr2M01VA",25,1040,{"$nulls":3},"空",null,700,null,"空",null,735,null,590,16,50,47,241]
["CrMoA1",46,"38CrMoA1",30,940,{"$nulls":3},"水、油",null,640,null,"水、油",null,980,null,835,14,50,71,229]
["CrY",47,"40CrV",25,880,{"$nulls":3},"油",null,650,null,"水、油",null,885,null,735,10,50,71,241]
[null,48,"50CrVA",25,860,{"$nulls":3},"油",null,500,null,"水、油",null,1280,null,1130,10,40,null,255]
["CrMn",49,"15CrMn",15,880,{"$nulls":3},"油",null,200,null,"水、空",null,785,null,590,12,50,47,179]
[null,50,"20CrMn",15,850,{"$nulls":3},"油",null,200,null,"水、空",null,930,null,735,10,45,47,187]
[null,51,"40CrMn",25,840,{"$nulls":3},"油",null,550,null,"水、油",null,980,null,835,9,45,47,229]
["CrMnSi",52,"20CrMnSi",25,880,{"$nulls":3},"油",null,480,null,"水、油",null,785,null,635,12,45,55,207]
["CrMnSi",53,"25CrMnSi",25,880,{"$nulls":3},"油",null,480,null,"水、油",null,1080,null,885,10,40,39,217]
[null,54,"30CrMnSi",25,880,{"$nulls":3},"油",null,520,null,"水、油",null,1080,null,885,10,45,39]
[null,55,"30CrMnSiA",25,880,{"$nulls":3},"油",null,540,null,"水、油",null,1080,null,835,10,45,39,229]
["CrMnSi",56,"35CrMnSiA","试样","加热到880°C，于280～310°C等温淬火",{"$nulls":9},1620,null,1280,9,40,31,241]
[{"$nulls":3},"试样",950,null,890,null,"油",null,230,null,"空、油"]
["CrMnMo",57,"20CIMnM0",15,850,{"$nulls":3},"油",null,200,null,"水、空",null,1180,null,885,10,45,55,217]
[null,58,"40CrMnMo",25,850,{"$nulls":3},"油",null,600,null,"水、油",null,980,null,785,10,45,63,217]
["CrMnTi",59,"20CrMnTi",15,880,null,870,null,"油",null,200,null,"水、空",null,1080,null,850,10,45,55,217]
[null,60,"30CrMnTi","试样",880,null,850,null,"油",null,200,null,"水、空",null,1470,null,null,9,40,47,229]
["CrNi",61,"20CrNi",25,850,{"$nulls":3},"水、油",null,460,null,"水、油",null,785,null,590,10,50,63,197]
[null,62,"40CrNi",25,820,{"$nulls":3},"油",null,500,null,"水、油",null,980,null,785,10,45,55,241]
[null,63,"45CrNi",25,820,{"$nulls":3},"油",null,530,null,"水、油",null,980,null,785,10,45,55,255]
[null,64,"50CrNi",25,820,{"$nulls":3},"油",null,500,null,"水、油",null,1080,null,835,8,40,39,255]
[null,65,"12CrNi2",15,860,null,780,null,"水、油",null,200,null,"水、空",null,785,null,590,12,50,63,207]
[null,66,"12CrNi3",15,860,null,780,null,"油",null,200,null,"水、空",null,930,null,685,11,50,71,217]
["CrNi",67,"20CrNi3",25,830,{"$nulls":3},"水、油",null,480,null,"水、油",null,930,null,735,11,55,78,241]
[null,68,"30CrNi3",25,820,{"$nulls":3},"油",null,500,null,"水、油",null,980,null,785,9,45,63,241]
[null,69,"37CrNi3",25,820,{"$nulls":3},"油",null,500,null,"水、油",null,1130,null,980,10,50,47,269]
[null,70,"12Cr2Ni4",15,860,null,780,null,"油",null,200,null,"水、空",null,1080,null,835,10,50,71,269]
[null,71,"20Cr2Ni4",15,880,null,780,null,"油",null,200,null,"水、空",null,1180,null,1080,10,45,63,269]
["CrNiMo",72,"20CrNiMo",15,850,{"$nulls":3},"油",null,200,null,"空",null,980,null,785,9,40,47,197]
[null,73,"40CrNiMoA",25,850,{"$nulls":3},"油",null,600,null,"水、油",null,980,null,835,12,55,78,269]
["CrMnNiMo",74,"18CrMnNiMoA",15,830,{"$nulls":3},"油",null,200,null,"空",null,1180,null,885,10,45,71,269]
["CrNiMoV",75,"45CrNiMoVA","试样",860,{"$nulls":3},"油",null,460,null,"油",null,1470,null,1330,7,35,31,269]
["CrNiW",76,"18Cr2Ni4WA",15,950,null,850,null,"空",null,200,null,"水、空",null,1180,null,835,10,45,78,269]
[null,77,"25Cr2Ni4WA",25,850,{"$nulls":3},"油",null,550,null,"水、油",null,1080,null,930,11,45,71,269]
["注：1.表中所列热处理温度允许调整范围：淬火±15℃，低温回火±20%，高温回火±50°C。"]
["　　2.硼钢在淬火前可先经正火，正火温度应不高于其淬火温度，铬锰钛钢第一次淬火可用正火代替。"]
["　　3.拉伸试验时试样钢上不能发现屈服，无法测定屈服点ós况下，可以测规定残余伸长应力ór 0.2。"]
["钢组","序号","统一数字代号","牌号","化学成分(质量分数)(%)"]
[{"$nulls":4},"C","Si","Mn","Cr","Mo","Ni","B","V","其他"]
["Mn",1,"A00202","20Mn2","0.17～0.24","0.17～0.37","1.40～1.80"]
[null,2,"A00302","30Mn2","0.27～0.34","0.17～0.37","1.40～1.80"]
[null,3,"A00352","35Mn2","0.32～0.39","0.17～0.37","1.40～1.80"]
[null,4,"A00402","40Mn2","0.37～0.44","0.17～0.37","1.40～1.80"]
[null,5,"A00452","45Mn2","0.42～0.49","0.17～0.37","1.40～1.80"]
["Mn",6,"A00502","50Mn2","0.47～0.55","0.17～0.37","1.40～1.80"]
["MnV",7,"A01202","20MnV","0.17～0.24","0.17～0.37","1.30～.60",{"$nulls":4},"0.07～0.12"]
["siMn",8,"A10272","27siMn","0.24～0.32","1.10～1.40","1.10～1.40"]
[null,9,"A10352","35siMn","0.32～0.40","1.10～1.40","1.10～1.40"]
[null,10,"A10422","42siMn","0.39～0.45","1.10～1.40","1.10～1.40"]
["SiMn-MOV",11,"A14202","20SiMn2MOV","0.17～0.23","0.90～1.20","2.20～2.60",null,"0.30～0.40",null,null,"0.05～0.12"]
[null,12,"A14262","25SiMn2MOV","0.22～0.28","0.90～1.20","2.20～2.60",null,"0.30～0.40",null,null,"0.05～0.12"]
[null,13,"A14372","37SiMn2MOV","0.33～0.39","0.60～0.90","1.60～1.90",null,"0.40～0.50",null,null,"0.05～0.12"]
["B",14,"A70402","40B","0.37～0.44","0.17～0.31","0.60～0.90",{"$nulls":3},"0.0005～0.0035"]
[null,15,"A70452","45B","0.42～0.49","0.17～0.37","0.60～0.90",{"$nulls":3},"0.0005～0.0035"]
[null,16,"A70602","50B","0.47～0.55","0.17～0.37","0.60～0.90",{"$nulls":3},"0.0005～0.0035"]
["MnB",17,"A71402","40MnB","0.37～0.44","0.17～0.37","1.10～1.40",{"$nulls":3},"0.0005～ 0.0035"]
[null,18,"A71452","45MnB","0.42～0.49","0.17～0.37","1.10～1.40",{"$nulls":3},"0.0005～0.0035"]
["Mn",19,"A72202","20MnMOB","0.16～0.22","0.17～0.37","0.90～1.20",null,"0.20 ～0.30",null,"0.0005～0.0035"]
["MoB"]
["MnVB",20,"A73152","15MnVB","0.12～0.18","0.17～0.37","1.20～1.60",{"$nulls":3},"0.0005～0.0035","0.07～0.12"]
[null,21,"A73202","20MnVB","0.17～0.23","0.17～0.37","1.20～1.60",{"$nulls":3},"0.005～0.0035","0.07～0.12"]
["钢组","序号","统一数字代号","牌号","化学成分(质量分数)(%)"]
[{"$nulls":4},"C","Si","Mn","Cr","Mo","Ni","B","V","其他"]
[null,22,"A73402","40MnVB","0.37～0.44","0.17～0.37","1.10～1.40",{"$nulls":3},"0.0005～0.0035","0.05～0.10"]
["MnTiB",23,"A74202","20MnTiB","0.17～0.24","0.17～0.37","1.30～1.60",{"$nulls":3},"0.0005～0.0035",null,"Ti0.04～0.10"]
[null,24,"A74252","25MnTiBRE","0.22～0.28","0.2Q～0.45","1.30～1.60",{"$nulls":3},"0.0005～0.0035",null,"Ti0.04～0.10"]
["Cr",25,"A20152","15Cr","0.12～0.18","0.17～0.37","0.40～0.70","0.70～1.00"]
[null,26,"A20153","15CrA","0.12～0.17","0.17～0.37","0.40～0.70","0.70～1.00"]
[null,27,"A20202","20Cr","0.18～0.24","0.17～0.37","0.50～0.80","0.70～1.00"]
[null,28,"A20302","30 Cr","0.27～0.34","0.17～0.37","0.50～0.80","0.80～1.10"]
["Cr",29,null,"35Cr","0.32～0.39","0.17～0.37","0.50～0.80","0.80～1.10"]
[null,30,"A20402","40Cr","0.37～0.44","0.17～0.37","0.50～0.80","0.80～1.10"]
[null,31,"A20452","45Cr","0.42～0.49","0.17～0.37","0.50～0.80","0.80～1.10"]
[null,32,"A20502","50Cr","0.47～0.54","0.17～0.37","0.50～0.80","0.80～1.10"]
["CrSi",33,"A21382","38Crsi","0.35～0.43","1.00～1.30","0.30～0.60","1.30～1.60"]
["Q1M0",34,"A30122","12CrMo","0.08～0.15","0.17～0.37","0.40～0.70","0.40～0.70","0.40～0.55"]
[null,35,"A30152","15CrMo","0.12～0.18","0.17～0.37","0.40～0.70","0.80～1.10","0.40～0.55"]
[null,36,"A30202","20CrM0","0.17～0.24","0.17～0.37","0.40～0.70","0.80～1.10","0.15～0.25"]
["Q1M0",37,"A30302","30CrMo","0.26～0.34","0.17～0.37","0.40～0.70","0.80～1.10","0.15～0.25"]
[null,38,"A30303","30CrMoA","0.26～0.33","0.17～0.37","0.40～0.70","0.80～1.10","0.15～0.25"]
[null,39,"A30352","35CrMo","0.32～0.40","0.17 ～0.37","0.40～0.70","0.80～1.10","0.15～0.25"]
[null,40,"A30422","42CrMo","0.38～0.45","0.17～0.37","0.50～0.80","0.90～1.20","0.15～0.25"]
["QMOV",41,"A31122","12CrMOV","0.08～0.15","0.17～0.37","0.40～0.70","0.30～0.60","0.25～0.35",null,null,"0.15～0.30"]
[null,42,"A31352","35CrMOV","0.30～0.38","0.17～0.37","0.40～0.70","1.00～1.30","0.20～0.30",null,null,"0.10～0.20"]
[null,43,"A31132","12CrlMOV","0、08～0.15","0、17～0.37","0.40～0、70",".0.90～1.20","0.25～0.35",null,null,"0.15～0.30"]
[null,44,"A31253","25Cr2MoVA","0.22～0.29","0.17～0.37","0.40～0.70","1.50～1.80","0.25～0.35",null,null,"0.15～0.30"]
[null,45,"A31263","25CrM01VA","0.22～0.29","0.17～0.37","0.50～0.80","2.10～2.50","0.90～1.10",null,null,"0.30～0.50"]
["CrM0AL",46,"A33382","38CrMOA1","0.35～0.42","0.20～0.45","0.30～0.60","1.35～1.65","0.15～0.25",{"$nulls":3},"A10.70～1.10"]
["CrV",47,"A23402","40CrV","0.37～0.44","0.17～0.37","0.50～0.80","0.80～1.10",{"$nulls":3},"0.10～0.20"]
[null,48,"A23503","50CrVA","0.47～0.54","0.17～0.37","0.50～0.80","0.80～1.10",{"$nulls":3},"0.10～0.20"]
["CrMn",49,"A22152","15CrMn","0.12～0.18","0.17～0.37","1.10～1.40","0.40～0.70"]
[null,50,"A22202","20CrMn","0.17～0.23","0.17～0.37","0.90～1.20","0.90～1.20"]
[null,51,"A22402","4CrMn","0.37～0.45","0.17～0.37","0.90～1.20","0.90～1.20"]
["CrMnSi",52,"A24202","20CrMnSi","0.17～0.23","0.90～1.20","0.80～1.10","0.80～1.10"]
[null,53,"A24252","25CrMnSi","0.22～0.28","0.90～1.20","0.80～1.10","0.80～1.10"]
["钢组","序号","统一数字代号","牌号","化学成分(质量分数)(%)"]
[{"$nulls":4},"C","Si","Mn","Cr","Mo","Ni","B","V","其他"]
["CrMnSi",54,"A24302","30CrMnSi","0.27～0.34","0.90～1.20","0.80～1.10","0.80～1.10"]
[null,55,"A24303","30CrMnSiA","0.28～0.34","0.90～1.20","0.80～1.10","0.80～1.10"]
[null,56,"A24353","350MnSiA","0.32～0.39","1.10～1.40","0.80～1.10","1.10～1.40"]
["CrMnMo",57,"A34202","20CrMnM0","0.17～0.23","0.17～0.37","0.90～1.20","1.10～1.40","0.20～0.30"]
[null,58,"A34402","40CrMnMo","0.37～0.45","0.17～0.37","0.90～1.20","0.90～1.20","0.20～0.30"]
["CrMn-Ti",59,"A26202","20CrMnTi","0.17～0.23","0.17～0.37","0.80～1.10","1.00～1.30",{"$nulls":4},"Ti 0.04～0.10"]
[null,60,"A26302","30CrMnTi","0.24～0.32","0.17～0.37","0.80～1.10","1.00～1.30",{"$nulls":4},"Ti 0.04～0.10"]
["CrNi",61,"A40202","20CrNi","0.17～0.23","0.17～0.37","0.40～0.70","0.45～0.75",null,"1.00～1.40"]
[null,62,"A40402","40CrNi","0.37～0.44","0.17～0.37","0.50～0.80","0.45～0.75",null,"1.00～1.40"]
[null,63,"A40452","45CRni","0.42～0.49","0.17～0.37","0.50～0.80","0.45～0.75",null,"1.00～1.40"]
[null,64,"A40502","50CrNi","0.47～0.54","0.17～0.37","0.50～0.80","0.45～0.75",null,"1.00～1.40"]
[null,65,"A41122","12CrNi2","0.10～0.17","0.17～0.37","0.30～0.60","0.60～0.90",null,"1.50～1.90"]
[null,66,"A42122","12CrNi3","0.10～0.17","0.17～0.37","0.30～0.60","0.60～0.90",null,"2.75～3.15"]
[null,67,"A42202","20CrNi3","0.17～0,24","0.17～0.37","0.30～0.60","0.60～0.90",null,"2.75～3.15"]
[null,68,"A42302","30CrNi3","0.27～0.33","0.17～0.37","0.30～0.60","0.60～0.90",null,"2.75～3.15"]
[null,69,"A42372","37CrNi3","0.34～0.41","0.17～0.37","0.30～0.60","1.20～1.60",null,"3.00～3.50"]
[null,70,"A43122","12Cr2Ni4","0.10～0.16","0.17～0.37","0.30～0.60","1.25～1.65",null,"3.25～3.65"]
["钢组","序号","统一数字代号","牌号","化学成分(质量分数)(%)"]
[{"$nulls":4},"C","Si","Mn","Cr","Mo","Ni","B","V","其他"]
["CrNi",71,"A43202","20Cr2Ni4","0.17～0.23","0.17～0.37","0.30～0.60","1.25～1.65",null,"3.25～3.65"]
["CrNiMo",72,"A50202","20CrNiMo","0.17～0.23","0.17～0.37","0.60～0.95","0.40～0.70","0.20～0.30","0.35～0.75"]
[null,73,"A50403","40CrNiMOA","0.37～0.44","0.17～0.37","0.50～0.80","0.60～0.90","0.15～0.25","1.25.1.65"]
["CrMn-NiMo",74,"A50183","18CrNiMnMoA","0.15～0.21","0.17～0.37","1.10～1.40","1.00～1.30","0.20～0.30","1.00～1.30"]
["CrNi-MOV",75,"A51453","45CrNiM0VA","0.42～0.49","0.17～0.37","0.50～0.80","0.80～1.10","0.20～0.30","1.30～1.80",null,"0.10～0.20"]
[null,76,"A52183","18Cr2Ni4WA","0.13～0.19","0.17～0.37","0.30～0.60","1.35～1.65",null,"4.00～4.50",null,null,"W0.80～1.20"]
[null,77,"A52253","25Cr2Ni4WA","0.21～0.28","0.17～0.37","0.30～0.60","1.35～1.65",null,"4.00～4.50",null,null,"W0.80～1.20"]
["注：1.本标准中规定带“A”字标志的牌号仅能作为高级优质钢订货，其他牌号按优质钢订货。"]
["　　2.根据需方要求，可对表中各牌号按高级优质钢(指不带“A”)或特级优质钢(全部牌号)订货，只需在所订牌号后加“A”或“B”字标志(对有“A”字牌号应先去掉“A”)。需方对表中牌号化学成分提出其他要求可按特殊要求订货。"]
["　　3.统一数字代号系根据GB/T 17616规定列入，优质钢尾部数字为“2”，高级优质钢(带“A”钢)尾部数字为“3”，特级优质钢(带“E”钢)尾部数字为“6”。"]
["　　4.稀土成分按0.05%计算量加入，成品分析结果供参考。"]
["　　5.钢中硫、磷及残余铜、铬、镍、钼含量应符合下表的规定。"]
[]
["钢类","化学成分(质量分数)(%)"]
[null,"P","S","Cu","Cr","Ni","Mo"]
[null,"≤"]
["优质钢",0.035,0.035,0.3,0.3,0.3,0.15]
["高级优质钢",0.025,0.025,0.25,0.3,0.3,0.1]
["特级优质钢",0.025,0.015,0.25,0.3,0.3,0.1]