D502 |
EDCr-A1-03 |
JIS
DF-4A |
HRC≥40 |
用于堆焊工作温度450℃以下的碳钢或合金钢的轴及阀门.
For surfacing welding the axle and valve made by carbon steel or alloy steet which working temperature is below 450℃. |
D507 |
EDCr-A1-15 |
JIS
DF-4A |
HRC≥40 |