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31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm

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31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm

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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31CrMoV9(1.8509)/ 38CrMoAlA Nitriding Alloy Steel Round Bar for Precision Machining

Products Specification

Products Name

38CrMoAlA 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

Product Name: 38CrMoAlA Alloy Steel Round Bar (Nitriding Steel)

  • Standard: GB/T 3077 (China)
  • Material Type: High-Strength Nitriding Alloy Steel
  • Shape: Round Bar (Diameter Range: Φ10mm–Φ300mm, customizable)

Chemical Composition (wt%):

Element C Cr Mo Al Mn Si P (≤) S (≤)
Content 0.35~0.42 1.35~1.65 0.15~0.25 1.00~1.30 0.30~0.60 0.20~0.45 0.025 0.025

Mechanical Properties (After Heat Treatment):

  • Tensile Strength (σ₃): ≥980 MPa

  • Yield Strength (σ₅): ≥835 MPa

  • Elongation (δ): ≥14%

  • Impact Toughness (AKU): ≥63 J

  • Surface Hardness (After Nitriding): ≥850 HV


Key Features:

  1. Excellent Nitridability: High aluminum (Al) content ensures a hard, wear-resistant nitride layer (0.3–0.5mm depth).

  2. High Core Strength: Suitable for heavy-load components requiring both surface hardness and core toughness.

  3. Stability: Good resistance to tempering and fatigue.


Heat Treatment Recommendations:

  • Quenching: 930–950°C (Oil cooling)

  • Tempering: 600–650°C (Air cooling)

  • Nitriding: 500–530°C (Ion/Gas nitriding for optimal surface hardness)


Typical Applications:

  • Precision gears, shafts, and spindles

  • Injection molding machine screws

  • Aerospace and automotive high-wear components

  • Hydraulic/pneumatic cylinders


Equivalent Grades (International Standards):

  • USA (ASTM/AMS): AMS 6470 (Nitraloy 135M)

  • Europe (EN/DIN): 31CrMoV9 (1.8509)

  • Japan (JIS): SACM645


Packaging & Delivery:

  • Packaging: Bundles with steel straps, waterproof paper, or as per customer request.

  • Surface Protection: Oiled or phosphated to prevent rust.

  • Lead Time: 15–30 days (Subject to quantity).


Certifications:

  • Mill Test Certificate (MTC) per EN 10204 3.1

  • Compliance with GB, ISO, or customer-specified standards.


Note: Custom sizes, heat treatment, and testing (e.g., UT, hardness mapping) are available upon request.

31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm


Product Tags:

38CrMoAlA Steel Round Bar

      

31CrMoV9 Steel Round Bar

      

Precision Machining Steel Round Bar

      
China 31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm wholesale

31CrMoV9 1.8509 / 38CrMoAlA Nitriding Alloy Steel Round Bar For Precision Machining Length 6m Diameter 10-300mm Images

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