JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
WUXI DETA METAL PRODUCTS CO.,LTD
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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 |
| 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 |
Tensile Strength (σ₃): ≥980 MPa
Yield Strength (σ₅): ≥835 MPa
Elongation (δ): ≥14%
Impact Toughness (AKU): ≥63 J
Surface Hardness (After Nitriding): ≥850 HV
Excellent Nitridability: High aluminum (Al) content ensures a hard, wear-resistant nitride layer (0.3–0.5mm depth).
High Core Strength: Suitable for heavy-load components requiring both surface hardness and core toughness.
Stability: Good resistance to tempering and fatigue.
Quenching: 930–950°C (Oil cooling)
Tempering: 600–650°C (Air cooling)
Nitriding: 500–530°C (Ion/Gas nitriding for optimal surface hardness)
Precision gears, shafts, and spindles
Injection molding machine screws
Aerospace and automotive high-wear components
Hydraulic/pneumatic cylinders
USA (ASTM/AMS): AMS 6470 (Nitraloy 135M)
Europe (EN/DIN): 31CrMoV9 (1.8509)
Japan (JIS): SACM645
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).
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.
