钢铁材料化学成分表 (2).doc

钢铁材料化学成分一览表碳 素 结 构 钢 的 化 学 成 分（GB700-88）优 质 碳 素结构 钢 的 化 学 成 分(GB699-88、JB/ZQ4287-86)牌号等级化 学 成 分，%脱氧方法与旧标准GB700-79牌号对照特性和用途钢组钢号化 学 成 分，%交货状态特性和用途CMnSiSPCSiMnPSCrNi未热处理退火钢不 大 于≤Q195—0.06~0.120.25~0.500.300.0500.45F、b、z?见注1100.07~0.140.17~0.370.35~0.650.0350.0350.150.25Q215A0.09~0.150.25~0.550.300.0500.45F、b、zA2150.12~0.190.17~0.370.35~0.650.0350.0350.250.25B0.045C2200.17~0.240.17~0.370.35~0.650.0350.0350.250.25Q235A0.14~0.220.30~0.65*0.300.0500.045F、b、zA3S200.17~0.240.15~0.400.30~0.600.0450.0450.350.30B0.12~0.200.30~0.70*0.045C3250.22~0.300.17~0.370.50~0.800.0350.0350.250.25C≤0.180.35~0.800.0400.040Z---300.27~0.350.17~0.370.50~0.800.0350.0350.250.25D≤0.170.0350.035T、z---350.32~0.400.17~0.370.50~0.800.0350.0350.250.25Q255A0.18~0.280.40~0.700.300.0500.045F、b、zA4S350.32~0.390.15~0.400.50~0.800.0450.0450.350.30B0.045C4400.37~0.450.17~0.370.50~0.800.0350.0350.250.25Q275-0.28~0.380.50~0.800.350.0500.045b、ZC5450.42~0.500.17~0.370.50~0.800.0350.0350.250.25注：1、Q195不分等级，Q195的化学成分与旧标准的B1同，力学性能与A1同。

2、*表示Q235A、B级沸腾钢锰含量上限为0.60%3、本标准适应于一般结构钢和工程用热轧钢板、钢带、型钢、棒钢钢材一般以热轧状态交货，一般在供应状态下使用，也可正火处理交货（但A级钢材除外）S450.42~0.500.15~0.400.50~0.800.0450.0450.350.30500.47~0.550.17~0.370.50~0.800.0350.0350.250.25550.52~0.600.17~0.370.50~0.800.0350.0350.250.25600.57~0.650.17~0.370.50~0.800.0350.0350.250.25一 般 工 程 用 铸 造 碳 钢 件（GB11352-89）灰 铸 铁 件(GB9439-88)牌 号元 素 最 高 含 量，%与旧标准GB979-67牌号对照特性和用途牌 号化 学 成 分，%与旧标准牌号对照特性和用途CSiMnSPCSiMnPSZG200-4000.200.500.800.04ZG15HT150珠光体+伯素体（20%）3.6~3.81.4~2.20.6~0.8≤0.25≤0.15HT15-33ZG230-4500.300.90ZG25ZG270-5000.40ZG35HT200珠光体3.0~3.32.0~2.30.6~0.9≤0.20≤0.12HT20-40ZG310-5700.500.60ZG45ZG340-6400.60ZG55HT250珠光体3.1~3.31.6~2.00.7~1.0≤0.20≤0.12HT25-47HT300100%珠光体3.0~3.21.4~1.60.8~1.1≤0.16≤0.12HT30-54HT350100%珠光体2.8~3.11.0~1.30.9~1.3≤0.12≤0.10HT35-61。