40Cr steel pipe has been widely used in my country's GB standard steel, and quenched and tempered steel is one of the most widely used steels in the machining industry. After heat treatment, it has good comprehensive physical properties, excellent ultra-low temperature fracture toughness and low vacancy sensitivity. 40cr steel pipe has good cutting performance. It can be hardened through φ28~60mm during water quenching, and φ15~40mm during oil quenching. In addition to heat treatment, this steel can also be used for cyanidation and induction hardening. The machining performance is good. When the strength is 174~229HB, the relative drilling performance reaches 60%. Suitable for small and medium-sized injection molds.

Heating:

Temperature rise (℃): 850; Coolant: lubricating oil.

Heating temperature of secondary heat treatment (℃):-

Hardening temperature (℃): 520; Compressive strength (∞/MPa): ≥810 (when the specific strength is 25HRC) Yield limit (∞/MPa): ≥785 Elongation after fracture (δ5/%): ≥9 Cross-sectional shrinkage Rate (φ/%): ≥45 Digestion and absorption power (Aku2/J): ≥47, tensile strength (100/3000HBW).

Features

Medium carbon heat treatment steel, cold extrusion die steel. The price of 40Cr steel pipe is moderate, the production and processing are very easy, and after proper heat treatment, certain toughness, plastic deformation and wear resistance can be obtained. Strengthening can promote the optimization of the mechanism, close to the equilibrium state, and improve the processing performance of the rough embryo. When the temperature is 550~570℃ for quenching, the 40Cr steel pipe has good comprehensive physical properties. The cutting performance of seamless pipe is higher than that of 45 steel, which is suitable for induction hardening, flame heat treatment and other surface hard bottom dissolution.

Basic use

40Cr steel pipe is used for production and manufacturing, it is a mechanical part used for medium load and medium speed work, such as the steering rod of the automobile, the rear transmission shaft and the transmission gear, shaft, worm, gear shaft, top of the CNC lathe. Rods, etc.; manufacture components that bear long-term load, impact, and medium-speed operation, such as transmission gears, spindle bearings, oil pump motor rotors, guide rail sliders, ring sleeves, etc., and conduct medium temperature quenching and heat treatment.