13mm- 20mm 31CrMoV9 Nitriding Steel Bar / 1.8519 Alloy Steel Round Bars 200mm 250mm 350mm 370mm
13mm- 20mm 31CrMoV9 Nitriding Steel Bar / 1.8519 Alloy Steel Round Bars 200mm 250mm 350mm 370mm
Products Specification
|
Products Name |
31CrMoV9 Alloy Steel Round Bar |
|
Diameter |
10 - 500 mm |
|
Length |
6m or custom cutting any length as request |
|
Type |
Hot Rolled |
|
Brand |
BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc |
|
MOQ |
1 Ton |
|
Loading Port |
Shanghai Port |
|
Packing |
packing by steel wire rope |
|
Deliver time |
5 - 7 days for stock materials |
|
Other Grade |
Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo,304,3 16,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,5CrMnMo ,38CrMoAl, 31CrMoV9 |
|
Standard |
ASTM GB EN DIN |
|
Application |
Structure and Industrial |
Here’s a detailed technical overview of Alloy 1.8519 Round Steel
1. Introduction to Alloy 1.8519 Round Steel
Alloy 1.8519 is a high-strength, low-alloy steel grade designed for applications requiring excellent mechanical properties, weldability, and fatigue resistance. It is commonly used in heavy-duty machinery, automotive components, and structural engineering due to its balanced composition and reliability under stress.
2. Chemical Composition (Typical % Weight)
| Element | C | Si | Mn | Cr | Mo | Ni | P (max) | S (max) |
|---|---|---|---|---|---|---|---|---|
| Content | 0.38–0.45 | 0.15–0.35 | 0.60–0.90 | 0.90–1.20 | 0.15–0.30 | ≤0.40 | ≤0.025 | ≤0.020 |
Note: Exact composition may vary by manufacturer and standard.
3. Mechanical Properties
| Property | Value (Typical) |
|---|---|
| Tensile Strength | 900–1100 MPa |
| Yield Strength (Rp0.2) | 700–850 MPa |
| Elongation (A₅) | ≥12% |
| Impact Energy (Charpy, -20°C) | ≥40 J |
| Hardness (HBW) | 270–320 |
Conditions: Quenched & tempered (QT) state.
4. Delivery Conditions
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Hot-rolled (HR): Rough surface, as-rolled condition.
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Cold-drawn (CD): Improved dimensional accuracy, smoother surface.
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Heat-treated (QT): Quenched & tempered for optimal strength-toughness balance.
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Black (unpeeled) or Peeled/Turned: Surface finish options.
5. Standards & Specifications
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EN/DIN: 1.8519 (European standards, similar to 42CrMo4 variants).
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ASTM/SAE: Comparable to AISI 4140 but with adjusted Cr/Mo ratios.
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ISO: Equivalent grades under ISO 683-1.
6. Available Specifications
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Diameter: 10mm–500mm (custom sizes available).
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Length: 3m, 6m (standard), or cut-to-length.
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Tolerance: EN 10060, DIN 1013, or customer-specific.
7. Production Process
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Melting: Electric arc furnace (EAF) or ladle refining.
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Casting: Continuous casting into billets.
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Hot Rolling: Formed into round bars at 1100–1250°C.
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Cold Drawing (Optional): For precision dimensions.
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Heat Treatment: Quenching & tempering (QT) for final properties.
8. Key Characteristics
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High Strength-to-Weight Ratio: Ideal for dynamic loads.
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Good Fatigue Resistance: Suitable for cyclic stress applications.
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Weldability: Requires preheating (~200–300°C) and post-weld annealing.
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Machinability: Moderate; improved with annealing.
9. Heat Treatment Methods
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Quenching: Heated to 850–880°C, oil-cooled.
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Tempering: 550–650°C to adjust hardness/toughness.
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Annealing: 650–700°C (softening for machining).
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Normalizing: 850–900°C + air cooling (refines grain structure).
10. Applications
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Automotive: Crankshafts, gears, axles.
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Oil & Gas: Drill pipes, tool joints.
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Machinery: Hydraulic rods, bolts, couplings.
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Construction: High-stress structural components.
This summary covers all critical aspects of Alloy 1.8519 Round Steel. Let me know if you need additional details!
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