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牌 号 铸件壁厚 /mm C Si Mn P ≤ S ≤ HT100 - 3.4~3.9 2.1~2.6 0.5~0.8 0.3 0.15 HT150 30~50 >50 3.3~3.5 3.2~3.5 3.2~3.5 2.0~2.4 1.9~2.3 1.8~2.2 0.5~0.8 0.5~0.8 0.6~0.9 0.2 0.2 0.2 0.12 0.12 0.12 HT200 30~50 >50 3.2~3.5 3.1~3.4 3.0~3.3 1.6~2.0 1.5~1.8 1.4~1.6 1.7~0.9 0.8~1.0 0.8~1.0 0.15 0.15 0.15 0.12 0.12 0.12 HT250 30~50 >50 3.0~3.3 2.9~3.2 2.8~3.1 1.4~1.7 1.3~1.6 1.2~1.5 0.8~1.0 0.9~1.1 1.0~1.2 0.15 0.15 0.15 0.12 0.12 0.12 HT300 30~50 >50 2.9~3.2 2.9~3.2 2.8~3.1 1.4~1.7 1.2~1.5 1.1~1.4 0.8~1.0 0.9~1.1 1.0~1.2 0.15 0.15 0.15 0.10 0.10 0.10 |