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个人中心收藏查看我的收藏0有用+1030CrMo播报讨论上传视频合金结构钢30CrMo是一种中碳合金结构钢，执行中国标准GB/T 3077，对应日本牌号SCM430（JIS G4053）。其化学成分含碳0.26%-0.34%、铬0.80%-1.10%、钼0.15%-0.25%，硫和磷含量需低于0.035%以保障材料纯净度。该钢材经调质处理后抗拉强度可达≥930MPa，屈服强度≥785MPa，兼具高韧性和耐磨性，油淬临界直径达15-70mm，且在500℃以下高温环境下仍保持力学稳定性。通过淬火（840-900℃）与回火（420-700℃）工艺灵活调整性能，适用于制造高应力机械部件如齿轮、轴类及高强度螺栓（8.8S、10.9S级）。在石油化工、汽车制造、能源设备等领域广泛用于高压导管、高温紧固件及发动机曲轴等关键部件。使用前需严格检测成分以确保符合冶金标准，防止硫磷杂质影响材料性能。中文名30CrMo
别    名合金结构钢
数字代号 A30302
毛坯尺寸 25

目录
1简介2化学成分3钢厂现货规格4力学性能5热处理6主要特性7应用举例
简介
播报编辑执行标准：铬钼合金钢，这种钢是我国合金钢的一种，30是指含碳量，用它制造10.9S、 8.8S的高强度螺栓。但使用前必须经过化验，确认它的成分含量后才可放心使用。中国牌号30CrMO相当于日本SCM430。
化学成分
播报编辑30crmo（质量分数）（%）C：0.26～0.34Si：0.17～0.37Mn：0.40～0.70Cr：0.80～1.10Mo：0.15～0.25P：≤0.035S：≤0.035Ni：≤0.030Cu：≤0.030
钢厂现货规格
播报编辑材质规格*长度（mm）重量合金钢品名30CrMo3.0-25100T合金钢光亮圆棒30CrMo12-50100T合金钢热轧圆钢30CrMoФ100-130100T合金钢热轧圆钢30CrMoФ182-1762-8868100T合金钢热轧圆钢30CrMoФ160-170100T合金钢热轧圆钢30CrMoФ200-280100T合金钢热轧圆钢30CrMoФ200-280100T合金钢热轧圆钢30CrMoФ50-90100T合金钢热轧圆钢30CrMoФ50-95100T合金钢热轧圆钢30CrMo4-10100T合金钢热轧钢板30CrMo8-10100T合金钢热轧钢板30CrMo12-16100T合金钢热轧钢板30CrMo18-20100T合金钢热轧钢板30CrMo22-28100T合金钢热轧钢板30CrMo30-34100T合金钢热轧钢板30CrMo80-100100T合金钢锻打钢板30CrMo160定轧合金钢锻打钢板30CrMo170定轧合金钢锻打钢板30CrMo180定轧合金钢锻打钢板
力学性能
播报编辑试样毛坯尺寸（mm）：25热处理：第一次淬火加热温度（℃）：880；冷却剂：水、油30crmo圆钢第二次淬火加热温度（℃）：-回火加热温度（℃）：540；冷却剂：水、油抗拉强度（σb/MPa）：≥930屈服点（σs/MPa）：≥785断后伸长率（δ5/%）：≥12断面收缩率（ψ/%）：≥50冲击吸收功（Aku2/J）：≥63布氏硬度（HBS100/3000）（退火或高温回火状态）≤229
热处理
播报编辑退火annealing No.1 "760±10℃退火，炉冷至400℃空冷。HB220-230正火normalize No.4 860±10℃正火，出炉空冷。调质quenching+tempering No.5 840±10℃淬水或油（视产品型状复杂程度），680-700度回火。 HB<217调质quenching+tempering No.6 840±10℃淬油，再470度回火处理。 HRC41-45调质quenching+tempering No.7 840±10℃淬油，再480度回火处理。 HRC35-45调质quenching+tempering No.8 850℃淬油，再510度回火处理。 HRC38-42调质quenching+tempering No.9 850℃淬油，再500度回火处理。 HRC40-43调质quenching+tempering No.10 850℃淬油，再510℃回火处理。 HRC36-42调质quenching+tempering No.11 850℃淬油，再560℃回火处理。 HRC32-36调质quenching+tempering No.12 860℃淬油，再390度回火处理。 HRC48-52
主要特性
播报编辑此钢具有高的强度和韧性，淬透性较高，在油中临界淬透直径15～70mm；钢的热强度性也较好，在500℃以下具有足够的高温强度，但550℃时其强度显著下降；当合金元素在下限时焊接相当好，但接近上限时焊接性中等，并在焊前需预热到175℃以上；钢的可切削性良好，冷变形时塑性中等；热处理时在300～350℃的范围有第一类回火脆性；有形成白点的倾向。
应用举例
播报编辑这种钢通常是在调质状态下使用，当含碳量为下限的钢也可用作要求心部强度较高的渗碳钢。在中型机械制造业中主要用于制造截面较大、在高应力条件下工作的调质零件，如轴、主轴以及受高负荷的操纵轮、螺栓、双头螺栓、齿轮等；在化工工业中用来制造焊接零件、板材与管材构成的焊接结构和在含有氮氢介质中工作的温度不超过250℃的高压导管；在汽轮机、锅炉制造业中用于制造 450℃以下工作的紧固件、500℃以下受高压的法兰和螺母，尤其适于制造300大气压、400℃以下工作的导管。新手上路成长任务编辑入门编辑规则本人编辑我有疑问内容质疑在线客服官方贴吧意见反馈投诉建议举报不良信息未通过词条申诉投诉侵权信息封禁查询与解封©2025 Baidu 使用百度前必读 | 百科协议 | 隐私政策 | 百度百科合作平台 | 京ICP证030173号 京公网安备11000002000001号window.PAGE_DATA= 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8.8S的高强度螺栓.但使用前必须经过化验,确认它的成分含量后,才可放心使用.中国牌号30CrMO相当于日本SCM430折叠编辑本段化学成分(质量分数)(%)C:0.26~0.34Si:0.17~0.37Mn:0.40~0.70Cr:0.80~1.10Mo:0.15~0.25P:≤0.035S:≤0.035Ni:≤0.030Cu:≤0.030[2]折叠编辑本段钢厂现货规格材质规格*长度(mm)重量合金定轧合金钢锻打钢板展开折叠编辑本段力学性能试样毛坯尺寸(mm):25热处理:第一次淬火加热温度(℃):880;冷却剂:水、油第二次淬火加热温度(℃):-回火加热温度(℃):540;冷却剂:水、油抗拉强度(σb/MPa):≥930屈服点(σs/MPa):≥785断后伸长率(δ5/%):≥12断面收缩率(ψ/%):≥50冲击吸收功(Aku2/J):≥63布氏硬度(HBS100/3000)(退火或高温回火状态)≤229[3]折叠编辑本段热处理退火annealing No.1 "760±10℃退火，炉冷至400℃空冷。HB220-230正火normalize No.4 860±10℃正火，出炉空冷。这种钢通常是在调质状态下使用，当含碳量为下限的钢也可用作要求心部强度较高的渗碳钢。在中型机械制造业中主要用于制造截面较大、在高应力条件下工作的调质零件，如轴、主轴以及受高负荷的操纵轮、螺栓、双头螺栓、齿轮等;在化工工业中用来制造焊接零件、板材与管材构成的焊接结构和在含有氮氢介质中工作的温度不超过250℃的高压导管;在汽轮机、锅炉制造业中用于制造 450℃以下工作的紧固件、 500℃以下受高压的法兰和螺母，尤其适于制造300大气压、400℃以下工作的导管。