ER55-B8耐热钢焊丝ER55-B8焊丝

ER55-B8耐热钢焊丝 C17 ER62-B3耐热焊丝 C=0.07 Mn=0.40-0.70 Si=0.40-0.70 Ni620 Rpo.2/MPa>540 A/%>19