12Cr2Ni4A special steel price 12Cr2Ni4A round steel wholesale and retail

Material name: Alloy structural steel Grade:
Standard:
●Characteristics and scope of application:
High strength, good toughness, good hardenability, surface layer hardness and wear resistance after carburizing and quenching All are good, the plasticity is good during cold deformation, and the machinability is still good, but it has white spot sensitivity and temper brittleness, poor performance, high alloying element content, poor heat treatment process performance, and normalizing hardness after forging is still high, so it needs Prolonged high temperature tempering... It is used for large carburized parts working under high load and alternating stress, such as various gears, worm gears, worms, shafts and other mechanical structural parts that are subject to high loads.
●Chemical composition:
Carbon: .～
Silicon: .～
Manganese .3～
Sulfur: Allowable residual content
Phosphorus: Allowable residual content
Chromium: .~
Nickel.~3
Copper: Allowable residual content
●Mechanical properties:
Tensile strength:
Yield strength:
Elongation ():
Reduction of area ():
Impact energy:
Impact toughness value (/):
Hardness:
Sample size: The size of the sample blank is
●Heat treatment specifications and metallographic structure:
Heat treatment specifications: quenching: first ℃, second time ℃, oil cooling and tempering ℃, water cooling, air cooling.
●Delivery status: Delivered in heat treatment (normalizing, annealing or high temperature tempering) or non-heat treatment status. The delivery status should be specified in the contract.