1 cr6si2mo properties and USES
Shape of martensite heat-resisting steel, in 800 ℃ has good oxidation resistance. Compared with 1 cr5mo steel, including Si quantity 1.5%, make steel tempering brittleness tendency increases, the parts under high temperature to work long hours would produce the brittle fracture. The steel in sulfuric oxidizing atmosphere and hot oil medium corrosion resistant performance is very good. After normalizing and tempering heat treatment have higher endurance strength and creep strength.
The steel free hardening phenomenon, hot work, such as cooling too fast, will occur crack, should slow cooling. Weldability poor, can adopt welding, unfavorable gas welding, welding before preheat to 300 ℃ ~ 400 ℃, 750 ℃ after welding tempering treatment.
Working temperature 700 ℃ or less of the boiler hanger and economizer pipe clamp
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