20Cr Alloy Structural Steel Bar

20Cr is a steel grade and it is a low-hardenability carburized steel. 20Cr alloy steel is mostly used for the manufacture of carburized parts with high core strength requirements, surface wear less than 30mm or complex shape and low load.

Specification of 20Cr Steel

Round rolled：10~320
Flat-rolled products：5~50×44~150
Square rolled：□80~280
Round Forging: Φ100~950
Fang Forging：□120~740

20Cr structural steel Chemical Composition

C: 0.18~0.24
Si: 0.17~0.37
Mn: 0.50~0.80
Cr: 0.70~1.00
S: Allowable residual content ≤0.035
P: Allowable residual content≤0.035
Ni: Allowable residual content≤0.30
Cu: Allowable residual content≤0.30
Mo: Allowable residual content≤0.15

20Cr Alloy Steel Mechanical Property

Tensile strength (σb/MPa): ≥ 835
Yield point (σs/MPa): ≥540
Elongation after break (δ5/%): ≥10
Area shrinkage (ψ/%): ≥40
Impact absorption work (Aku2/J): ≥47
Brinell hardness (HBS100/3000) (annealed or high temperature tempered state): ≤179

Delivery status: delivered by heat treatment (normalizing, annealing or high temperature tempering) or without heat treatment, the delivery status should be stated in the contract