20MnV6 Steel Round Bar

20MnV6 Steel Round Bar/20MnV6 Hollow Bar

  • Product Name: 20MnV6 Steel Round Bar/20MnV6 Hollow Bar
  • Standard: DIN EN (Corresponding Chinese standard is GB/T 3077 – 1988)3
  • Grade: 20MnV6
  • Outer Diameter: Usually available in the range of 8 to 480 mm, and can also be customized according to customer requirements. Common sizes include Φ20, Φ50, Φ45, φ110, φ80, φ100, φ75, φ120, φ160, Φ200, Φ140, Φ85, etc1.
  • Length: Generally 1 to 12 m, and can be adjusted as per customer needs.
  • Surface Treatment: The surface of the round steel can be black sprayed, PE  coated, or customized according to customer requirements. Common surface conditions include black hot rolled, cold drawn bright, peeled, rough  turned, polished, etc.

  • Manufacturing Process: It can be processed by hot rolling, cold drawing, forging, etc. Heat treatment processes such as quenching and tempering are often used to achieve the desired mechanical properties.

20MnV6 Steel Round Bar Chemical Composition and Mechanical Properties

Chemical Composition
ElementContent (%)
Carbon (C)0.17 – 0.24
Silicon (Si)0.17 – 0.37
Manganese (Mn)1.30 – 1.60
Phosphorus (P)≤0.035 (allowable residual content)
Sulfur (S)≤0.035 (allowable residual content)
Chromium (Cr)≤0.30 (allowable residual content)
Nickel (Ni)≤0.30 (allowable residual content)
Copper (Cu)≤0.30 (allowable residual content)
Vanadium (V)0.07 – 0.12
Mechanical Properties
  • Tensile Strength (σb): ≥785 MPa (80 kgf/mm²)
  • Yield Strength (σs): ≥590 MPa (60 kgf/mm²)
  • Elongation (δ5): ≥10%
  • Reduction of Area (ψ): ≥40%
  • Impact Energy (Akv): ≥55 J
  • Impact Toughness Value (αkv): ≥69 J/cm² (7 kgf·m/cm²)
  • Hardness: ≤187 HB (annealed or high – temperature tempered condition)
Physical Properties
  • Density: Approximately 7.85 g/cm³
  • Thermal Conductivity: Around 49 W/(m·K) at room temperature
  • Specific Heat Capacity: Approximately 0.49 J/(g·K)
  • Melting Point: Typically 1425 – 1540 °C (2600 – 2800 °F)
  • Magnetic Properties: Typically ferromagnetic

Products List

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4140 Chrome Plated Bar Chrome Shaft

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304 Stainless Steel Round Bar

316 Stainless Steel Round Bar

304 Chrome Plated Stainless Steel Bars

 

20MnV6 Steel Round Bar Hollow bar
ASTM A36 HOT ROLLED STEEL ROUND BAR SUPPLIER GOOD QUALITY
20MnV6 Steel Round Bar Applications

It is widely used in manufacturing various mechanical parts, such as automotive steering knuckles, rear axles, machine – tool gears, shafts, worms, spline shafts, and bushings. It is also suitable for making welded structural parts like boilers, high pressure vessels, and large  diameter high  pressure pipes. In addition, it can be used for cold drawn and cold stamped parts such as piston pins and gears.

Packaging and Transportation

  • Packaging: Usually packed in woven bags, wooden boxes, or loaded into 20 foot or 40 foot containers for standard seaworthy packaging.
  • Transportation: Can be transported by sea, air, or land logistics.

Delivery Time

  • Usually 7 – 15 days after receiving the deposit, but it may vary depending on the order quantity and production schedule.

20MnV6 steel Round Bar primary Alternative Materials

A. 4140 (AISI/SAE)
  • Chemical Similarity: Contains chromium and molybdenum instead of vanadium, enhancing hardenability and resistance to wear.
    • C: 0.38–0.43%
    • Cr: 0.80–1.10%
    • Mo: 0.15–0.25%
  • Mechanical Match: Offers higher tensile strength (≥1030 MPa) and comparable toughness, making it suitable for heavy-duty components like axles and gears.
  • Application Fit: Ideal for parts requiring extreme durability but can be costlier and less weldable than 20MnV6.
B. 20CrMo4 (EN 10083)
  • Alloying Elements: Combines chromium and molybdenum, similar to 4140 but with lower carbon content (0.17–0.23%).
  • Advantages: Excellent case hardening properties and good corrosion resistance, suitable for components like camshafts and connecting rods.
  • Trade-off: Slightly lower strength than 20MnV6 but superior machinability and weldability.
C. 1045 (AISI/SAE)
  • Carbon Steel Alternative: A non-alloyed medium-carbon steel with 0.42–0.50% carbon.
  • Benefits: Lower cost and easier availability, suitable for less critical applications like general-purpose shafts or bolts.
  • Limitations: Lower hardenability and strength compared to 20MnV6; requires heat treatment to match performance.
D. 20MnB4 (EN 10084)
  • Vanadium Substitute: Uses boron to improve hardenability, with similar carbon and manganese levels to 20MnV6.
  • Application: Commonly used in automotive components (e.g., gears, bolts) where cost-effective high strength is needed.

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