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GB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm Diameter

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GB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm Diameter

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

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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

1. Overview

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.


2. Key Features

  • 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).


3. Technical Specifications

Chemical Composition

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

Dimensions & Tolerances

  • 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).


4. Performance Data

Core Mechanical Properties (Post-Quenching & Tempering)

  • Tensile Strength: 950–1100 MPa

  • Yield Strength: ≥800 MPa

  • Elongation (δ5): ≥12%

  • Impact Energy (Charpy, 20°C): ≥55 J

Nitrided Layer Properties

  • 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).


5. Processing Guidelines

Recommended Workflow

  1. Soft Annealing: 850–880°C, furnace cooling to ≤220 HBW for machining.

  2. Rough Machining: Pre-shape components with allowances for nitriding distortion.

  3. Stress Relieving: 550–600°C post-machining to minimize dimensional changes.

  4. Final Nitriding: Gas nitriding at 500–530°C for 20–100 hours.

Post-Nitriding Finishing

  • Grinding or polishing to achieve surface roughness Ra ≤0.4 μm.

  • Optional TiN or DLC coatings for enhanced tribological performance.


6. Industry Applications

  • 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.


7. Customization Options

  • 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.


8. Packaging & Delivery

  • 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).


9. Why Choose Our 38CrMoAlA Round Bars?

  • 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!

GB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm DiameterGB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm DiameterGB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm DiameterGB Standard 38CrMoAlA Steel Round Bar / Steel Shaft 80mm 100mm 120mm Diameter


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