日本住友耐磨板SUMIHARD-K340标准规格? 名  称 厚度（mm）特征硬度（HB）应用特性SUMIHARD-K3406-100340焊接性及可用性SUMIHARD-K4006-100400高耐磨性及焊接性SUMIHARD-K5006-50500更高耐磨性及焊接性我们也能生产除上过规格以外的钢材?规格?                                                                                   化学成份（%）名   称 CSiMnPSBPcmt≦25t>25SUMIHARD-K340≦0.21≦0.70≦1.60≦0.025≦0.010≦0.0030≦0.30≦0.35SUMIHARD-K400≦0.21≦0.70≦1.60≦0.025≦0.010≦0.0030≦0.30≦0.35SUMIHARD-K500≦0.35≦0.70≦1.60≦0.025≦0.010≦0.0030≦0.42≦0.42其他成份可根据要求添加。硬度名   称 SUMIHARD-K340SUMIHARD-K400SUMIHARD-K500布氏硬度320-360360-440450-550