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Brand Name : DELTA
Model Number : 31CrMoV9(1.8509)/ 38CrMoAlA
Certification : ISO
Place of Origin : China
MOQ : 1 Ton
Price : 600-850 USD/Ton
Payment Terms : L/C, T/T, Western Union
Supply Ability : 20Ton per week
Delivery Time : 5 - 12 days based on the quantity
Packaging Details : standard packing for export
Products Name : Alloy Steel Round Bar
Diameter : 10 - 300mm
Length : 6m
Tech : Hot rolled
Service : Cutting
MOQ : 1 Ton
Loading Port : Shanghai Port
Standard : ASTM EN GB
GB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm Diameter
Products Specification
Products Name | 38CrMoAlA/1.8509 Nitriding Steel Round Bar |
Diameter | 10 - 300 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 |
Standard Size of our Steel Round Bar In Stock
10mm | 12mm | 15mm | 16mm | 18mm | 20mm |
25mm | 30mm | 35mm | 38mm | 40mm | 42mm |
45mm | 48mm | 50mm | 55mm | 60mm | 65mm |
70mm | 75mm | 80mm | 85mm | 90mm | 95mm |
105mm | 110mm | 115mm | 120mm | 130mm | 140mm |
150mm | 160mm | 170mm | 180mm | 190mm | 200mm |
210mm | 220mm | 230mm | 240mm | 250mm | 260mm |
270mm | 280mm | 290mm | 300mm | 310mm | 320mm |
38CrMoAlA is a high-performance nitriding steel widely used in precision engineering due to its exceptional surface hardness, wear resistance, and fatigue strength. This round bar is optimized for applications requiring a combination of a ultra-hard nitride layer and a tough core, making it ideal for high-stress environments.
Ultra-Hard Surface: Achieves 1000–1250 HV after gas nitriding, suitable for abrasive conditions.
Deep Nitride Layer: Adjustable depth (0.2–0.7 mm) based on nitriding duration and temperature.
High-Temperature Stability: Retains mechanical properties up to 500°C.
Machinability: Pre-nitriding machinability rating of 70% (compared to free-cutting steels).
Element | C | Cr | Mo | Al | Mn | Si | S/P (max) |
---|---|---|---|---|---|---|---|
Content | 0.35–0.42 | 1.35–1.65 | 0.15–0.25 | 0.70–1.10 | 0.30–0.60 | 0.20–0.45 | ≤0.035 |
Diameter Range: 15–250 mm (hot-rolled), 10–120 mm (cold-drawn).
Length: Standard 3–6 m, custom lengths up to 12 m.
Straightness Tolerance: ≤1.5 mm/m (cold-drawn), ≤3 mm/m (hot-rolled).
Tensile Strength: 950–1100 MPa
Yield Strength: ≥800 MPa
Elongation (δ5): ≥12%
Impact Energy (Charpy, 20°C): ≥55 J
Surface Hardness: 1000–1250 HV
Case Depth: 0.3–0.6 mm (standard 50-hour nitriding).
White Layer Control: ≤25 μm (adjustable via process parameters).
Soft Annealing: 850–880°C, furnace cooling to ≤220 HBW for machining.
Rough Machining: Pre-shape components with allowances for nitriding distortion.
Stress Relieving: 550–600°C post-machining to minimize dimensional changes.
Final Nitriding: Gas nitriding at 500–530°C for 20–100 hours.
Grinding or polishing to achieve surface roughness Ra ≤0.4 μm.
Optional TiN or DLC coatings for enhanced tribological performance.
Power Transmission: High-load gears, spline shafts, and turbine components.
Hydraulics: Precision piston rods, valve spools, and pump housings.
Tooling: Extrusion dies, injection mold cores, and wear plates.
Aerospace: Landing gear components, actuator systems.
Surface Finish: Black oxide, shot-peened, or precision-ground.
Certifications: EN 10204 3.1/3.2, RoHS compliance.
Testing Services: Inclusion rating (ASTM E45), hydrogen embrittlement testing.
Standard Packaging: Waterproof wrapping, steel strapping, and end protectors.
Export Compliance: Packed in ISO-compliant bundles for sea/air freight.
Lead Time: 15–30 days (stock items), 60–90 days (custom sizes).
Consistent Quality: Melted in electric arc furnaces with vacuum degassing for low inclusion levels.
Technical Support: Free nitriding process optimization consulting.
Global Supply: Warehouses in EU, Asia, and North America for fast delivery.
Contact us for tailored solutions to meet your high-performance alloy steel needs!
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GB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm Diameter Images |