Key Specifications/Special Features:
• Steel round bar
• Material: SCM420, SCM415, 20Mn-65Mn, 15CrMo-42CrMo, 20Mn2-40Mn
• Size: 20-100mm, 100-800mm
• Length: 3-6m
• Standard: JIS, GB, ASTM
• Delivery condition: rough turned+quenching and tempering

41Cr4/40Cr/ASTM5140/SCr440 Hot Rolled Alloy Steel Round Bars
• Key Specifications/Special Features:
• Material: hot rolled alloy steel
• Steel grades: 41Cr4, ASTM5140, SCR440 and 40Cr
• Technical conditions: GB/T3077-1999 (China) and ASTM A29/A29M-04
• Length: 3 to 6m
• Size: 12 to 800mm

GB 42CrMo Alloy Steel Bars with Higher Intensity, Good Fatigue Strength and Better Hardenability
• ASTM 4140

Key Specifications/Special Features:
• GB 42CrMo chemical composition:
• C: 0.38 to 0.45
• Si: 0.17 to 0.37
• Mn: 0.50 to 0.80
• S: ≤0.035
• P: ≤0.035
• Cr: 0.90 to 1.20
• Ni: ≤0.030
• Cu: ≤0.030
• Mo: 0.15 to 0.25
• Technique: forged

GB 42CrMo mechanical property:
• Tensile strength σb: ≥1,080 (110)MPa
• Yield strength σs: ≥930 (95)MPa
• Elongation δ5: ≥12%
• Hardness: ≤217HB
• Sizes:

Diameter: 12 to 200mm
Hot rolling: 200 to 800mm
• Flat bar:

Thickness: 10 to 100mm
Width: 50 to 500mm
• Surface treatment: black, coated or galvanized, no flaw and burr or rust
• Process: EAF + LF + VD + forge
• Delivery condition: hot rolled, black, annealing and hardness: HBS=160 to 210, or hot rolled/forged + rough machined (black surface after Q/T) + turned (optional)
• UT: to SEP 1924 C/c and D/d or according to customer's request

Futures:
• Compared with 35CrMo, the 42CrMo has higher intensity and better hardenability
• Good fatigue strength and impact resistance
• Good low temperature impact toughness
• No temper brittleness
• Usually used after tempered

Application:
• Often applied for making important machinery parts, such as bearing, gear, connecting rod, transmission gear, supercharger gear, engine cylinder, spring and rotary shouldered connections (1,200 to 2,000mm) for petroleum industry and jar knocker
• Substitute of hardened and tempered steel with higher chromium composition

Alloy Steel Round Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Forged Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Forged Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Round Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Bar
Grade : ASTM A182 F5, F9, F11, F12, F22, F91
EN Series in Grade:-
EN-1A, EN-3B, EN-8, EN-9, EN-16, EN-18, EN-19, EN-24, EN-29B, EN-31, EN-32B, EN-36, EN-36C, EN-42J, EN-45, EN-47, EN-48A, EN-100, EN-111, EN-202, EN-352, EN-353, EN-1117 Etc.
High Speed Steel (HSS), HCHCR & OHNS in Grade:-
M2, M3, M35, M42, T-1, T-4, T-15, T-42, D2, D3, H11, H13, OHNS-01 & EN52

Alloy Steel Flat Bars:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Forged Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Forged Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Round Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Bar
Grade : ASTM A182 F5, F9, F11, F12, F22, F91
EN Series in Grade:-
EN-1A, EN-3B, EN-8, EN-9, EN-16, EN-18, EN-19, EN-24, EN-29B, EN-31, EN-32B, EN-36, EN-36C, EN-42J, EN-45, EN-47, EN-48A, EN-100, EN-111, EN-202, EN-352, EN-353, EN-1117 Etc.
High Speed Steel (HSS), HCHCR & OHNS in Grade:-
M2, M3, M35, M42, T-1, T-4, T-15, T-42, D2, D3, H11, H13, OHNS-01 & EN52

Alloy Steel Hex Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Forged Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Forged Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Round Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Bar
Grade : ASTM A182 F5, F9, F11, F12, F22, F91
EN Series in Grade:-
EN-1A, EN-3B, EN-8, EN-9, EN-16, EN-18, EN-19, EN-24, EN-29B, EN-31, EN-32B, EN-36, EN-36C, EN-42J, EN-45, EN-47, EN-48A, EN-100, EN-111, EN-202, EN-352, EN-353, EN-1117 Etc.
High Speed Steel (HSS), HCHCR & OHNS in Grade:-
M2, M3, M35, M42, T-1, T-4, T-15, T-42, D2, D3, H11, H13, OHNS-01 & EN52

Alloy Steel Square Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Forged Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Forged Bar:
Range : 5mm to 500mm Dia in 100mm to 6000mm Length
Finish : Bright BlackPolish
Form : Round Bar, Square Bar, Hex (A/F) Bar, Bush Bar, Rectangle Bar, Flat Bar

Alloy Steel Bar
Grade : ASTM A182 F5, F9, F11, F12, F22, F91
EN Series in Grade:-
EN-1A, EN-3B, EN-8, EN-9, EN-16, EN-18, EN-19, EN-24, EN-29B, EN-31, EN-32B, EN-36, EN-36C, EN-42J, EN-45, EN-47, EN-48A, EN-100, EN-111, EN-202, EN-352, EN-353, EN-1117 Etc.
High Speed Steel (HSS), HCHCR & OHNS in Grade:-
M2, M3, M35, M42, T-1, T-4, T-15, T-42, D2, D3, H11, H13, OHNS-01 & EN52