1.5121牌号:1.5121标准:JIS●化学成分:碳C:0.07-0.12硅Si:0.15-0.35锰MN:0.30-0.60磷P:≤0.030硫S:≤0.251.5121圆棒/现货销售：直径6mm-350mm，1.5121圆钢/现货分类：车光圆、拉光圆、黑皮毛圆1.5121板材/现货销售：厚度6mm-300mm，均有现货1.5121板料/现货分类：机扎板、锻造板、锻板、扎板)