The lowtemperature toughness of lowtemperaturesteel can be improved effectively by means of adjusting alloy ingredients and modifying heat-treatment regime.
通过调整合金成份和改变热处理制度试验，有效地提高了低温钢的低温韧性。
2
Main raw material: cast iron, ductile iron, carbon steel, lowtemperaturesteel, stainless steel, alloy steel, heat-resistant steel, rubber, plastic, and so on.
材料主要有：灰铸铁、球墨铸铁、碳钢、低温钢、不锈钢、合金钢、耐热钢、橡胶、塑料等。
3
By evaluating the technology of new steel type and compiling reasonable process procedure, welding casing made of lowtemperaturesteel has been achieved successfully.