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    Material quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future
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42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications

  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
  • 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications
Minimum Order Quantity 1 Ton
Price US $630-1,250 / Ton
Product Details
Model NO. 42CrMo4 4140 Surface Treatment Polished
Alloy Type Alloy Diameter Range OD 6-630mm
Production Capacity 500tons Chemical Composition C 0.38-0.43
Chemical Composition Si 0.40max Chemical Composition Mn 0.60-0.90
Chemical Composition Cr 0.90-1.20 Chemical Composition Mo 0.15-0.30
Chemical Composition P ≤0.035 Chemical Composition S ≤0.035
Hardness Annealed HBS 217 Max Round Bar Size 60-800mm
Flat Bar Size 25-400mm*200-800mm
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42CrMo4 4140 Steel Round Bar

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Polished Surface Alloy Steel Bar

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OD 6-630mm Tool Steel Bar
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Product Description
Forged Alloy Steel Round Bar 42CrMo4 / 4140

42CrMo / 4142 SCM440 steel bar stock, hot rolled alloy steel round bar manufactured to ISO9001 standards with flexible MOQ and prompt delivery within 7 days from stock. Material test certificates available per DIN10204 3.1/3.2.

Equivalent Grades
GB DIN AISI JIS
42CrMo 1.7225 4140 SCM440
Chemical Composition
C Si Mn Cr Mo P S
0.38-0.43 0.40max 0.60-0.90 0.90-1.20 0.15-0.30 ≤0.035 ≤0.035
Product Specifications
Available Sizes
  • Round steel bar: 60-800mm
  • Flat steel bar: 25-400mm × 200-800mm
Surface Condition
  • Black surface
  • Grinded
  • Machined
Hardness
  • Annealed HBS 217 max
Applications

42CrMo / 4140 Steel Round Bar is used to produce components with high requirements on toughness, including gear wheels, pinions, connecting rods, and parts for mechanical engineering applications.

Heat Treatment Guidelines
Process Specifications
Forging Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C. Cool slowly in ashes or sand.
Annealing Heat to 830°C-850°C. Cool in furnace.
Normalising Heat to 870°C-900°C. Cool in still air.
Stress Relieving Annealed: Heat to 600°C-650°C. Hardened: Heat to 500°C-550°C. Cool in still air.
Hardening Heat to 830°C-880°C. Quench in oil or polymer.
Tempering Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided.
42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications 0 42CrMo4 4140 Alloy Steel Round Bar with Polished Surface and OD 6-630mm for High Toughness Applications 1
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