用于相同强度等级的低合金高强钢的焊接。

For welding low-alloy and high strength steel with corresponding strength grade.

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HG70钢是一种高强度低合金机械工程用钢。

HG70 steel is a high strength and low carbon steel for mechanical engineering use.

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可焊接材料：低碳钢、高强度钢、中碳钢、低合金钢。

Wwlding material:low carbon steel, high strength steel, medium carbon steel, low alloy steel.

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可焊材料：低碳钢、高强度钢、中碳钢，低合金钢。

Wwlding material: low carbon steel, high strength steel, medium carbon steel, low alloy steel.

youdao

可焊材料：低碳钢、高强度钢、中碳钢，低合金钢。

Wwlding material: low carbon steel, high strength steel, medium carbon steel, low alloy steel.

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