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20#é¢å« C:0.17-0.24% Si:0.17-0.37% Mn:0.35-0.65% Sâ¤0.035% Pâ¤0.035% Crâ¤0.25% Niâ¤0.25% Cuâ¤0.25%
Q235Açº§å« C â¤0.22% Mn â¤1.4% Si â¤0.35% S â¤0.050P â¤0.045
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Q235Cçº§å« C â¤0.17% Mnâ¤1.4% Siâ¤0.35% S â¤0.040 Pâ¤0.040
Q235Dçº§å« C â¤0.17% Mnâ¤1.4% Si â¤0.35% Sâ¤0.035 P â¤0.035
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