Introduction to 20Cr alloy steel:
The 20Cr smelting process is stable with good hardenability, excellent carburization and nitriding properties, minimal deformation after heat treatment, no temper brittleness, and good machining and welding performance. It is commonly used for manufacturing medium and small module gears, shafts, and so on, and can also be used for blades in steam turbines operating in the superheated steam zone at medium pressure and below.
Chemical composition of 20Cr alloy steel:
CarbonC:0.18～0.24%
SiliconSi:0.17～0.37%
ManganeseMn:0.50～0.80%
SulfurS:≤0.035%
PhosphorusP:≤0.035%
ChromeCr:0.70～1.00%
Mechanical properties of 20Cr alloy steel:
Tensile Strength:cb(MP):≥885
Yield Strength:os(MP):≥685
Tensile elongation:65(%):≥12
Section reduction rate:ψ(%):≥50
Impact Energy:kv(J):≥78
Hardness:≤197HBS
Sample Size: Raw sample dimensions are15mm
20Cr alloy steel heat treatment specification:
Quenching Heating Temperature(℃): 880; Coolant: Oil, Water
Annealing heating temperature(℃): 500; Coolant: oil, water
Delivery Status: Heat TreatedDelivered in (Annealed, Normalized, or Hardened and Tempered) condition, or as not heat treated, the delivery condition should be specified in the contract.
Characteristics and Applications of 20Cr Alloy Steel:
20Cr contains an appropriate amount of alloy elements and has a carbon content of about 0.2%. After carburization treatment, the surface has high hardness, and the core has excellent toughness. It is widely used in the manufacturing of boiler and steam turbine industry as partitions, blades, forgings, billets, and in the chemical industry for the production of high-pressure pipes and various components.Fasteners, for producing higher-grade carburized parts in the mechanical manufacturing industry, such as gears and shafts.
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