20CR

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GB/T 3077 20CR alloy steel

GB/T 3077 20CR steel main features:
GB 20Cr alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon, Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HR c. GB 20Cr steel Annealing delivery hardness less than 250HB.20Cr with a lower carbon content range, So GB 20Cr alloy steel have good weld ability.

GB/T 3077 20CR Chemical composition:

C(%)

0.18~0.24

Si(%)

0.17~0.37

Mn(%)

P(%)

S(%)

≤0.030

Cr(%)

0.70~1.10

0.50~0.80

≤0.030

GB/T 3077 20CR alloy steel mechanical property:

Tensile Strength (σb/MPa)

Yield point (σs/MPa)

Elongation (δ5/%)

Reduction of Area (ψ/%)

Impact Absorbing Energy(Aku2/J)

Brinell Hardness(HBS100/3000)

Annealing or High Tempering

≥835

≥540

≥10

≥40

≥47

≤179

GB/T 3077 20CR steel application:
20CR steel is mainly used for making cam shaft, driven gears of small tractor. This kind of steel also is mostly used in the manufacturing of the high demand  heart intensity, surface under wear, section under 30 mm or complex and not big load carburized parts (oil quenching), such as: machine tool transmission gear, gear shaft, worm and piston pins, claw clutch, etc.

We supply Mild Steel Plate. For Mild Steel Plate we always source from China's number one state mills for Hot Rolled Steel such as Tianjin Iron & Steel and Ma Steel. These two mills produce excellent S235JR and S355JR Hot Rolled Steel Plate.

Hot Rolled Coil

Typical size range:

1.5 – 12mm Thick

1250 – 2500mm Wide

Available specifications:

EN 10025-2004

JIS G3101-2004

ASTM A36-05

GB/T 700-2006

Steel grades:S235JR; S355JR; A36; SS400; SS490; Q235(A/B/C/D); Q345(A/B/C/D/E); Q390; Q420
Steel Mills:

Angang Steel

Baosteel

Benxi Iron & Steel

LY Steel

Masteel

Shagang Group

Shenheng Steel

WISCO

Email: [email protected]

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