Q+T alloy steel 34CrMo4 is chrome molybdenum steel. After quenching and tempering treatment, the alloy steel 34CrMo4 has good strength and mechnical properties. The steel 34CrMo4 finds applications in the aerospace, oil and gas, auto and defense industries.
Q+T alloy steel 34CrMo4 equivalent grades:（for referrence）
| EU | USA | Germany | Japan | Italy | China | France | England | Sweden | Finland | Russia | Inter |
| EN | - | DIN,WNr | JIS | UNI | GB | AFNOR | BS | SS | SFS | GOST | ISO |
| 34CrMo4 | 4135 | 34CrMo4 | SCM435 | 35CrMo4 | 35CrMo | 34CD4 | 708A30 | 2234 | 25CrMo4 | 35KHM | 34CrM |
| ZG35CrMo | 35CD4 | 708M32 | 35KHML |
Among Q+T alloy steel 34CrMo4 equivalent grades, the GB 35CrMo steel, AISI 4135 steel, JIS SCM435 steel are more popular.
GB 35CrMo steel is Chinese alloy steel material for engineering purpose. 35CrMo steel has high durability and creep strength at high temperature. Meanwhile, the low temperature impact toughness of 35CrMo steel is also good. The working temperature of 35CrMo steel is -100 ° C to 500 ° C.
AISI 4135 steel contains chromium and molybdenum as strengtheners. The AISI 4135 steel is capable of being heat treated to good strength levels while maintaining reasonable toughness.
JIS SCM435 steel is quenched and tempered steel with good weldability for its lower carbon content. JIS SCM435 steel is known for its high strength, toughness and hardness properties. JIS SCM435 steel is associated with the Japanese steel material standard JIS G4105.
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