Home > Steel Round Bar >

CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 / 1.8509 Steel Rod

Product Categories

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Trust Seal

Verified Supplier

Credit Check

Supplier Assessment

Contact Now

CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 / 1.8509 Steel Rod

Name: CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 18509 Steel Rod
Brand: DELTA
Price: 600 USD

Wholesale CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 / 1.8509 Steel Rod from china suppliers

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

Contact Now

CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 / 1.8509 Steel Rod

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

38CrMoAlA is a high-performance nitriding steel widely used in precision engineering applications due to its exceptional surface hardness and core toughness. It is ideal for components requiring wear resistance, high fatigue strength, and dimensional stability after nitriding.

Key Advantages

✔ Superior Nitriding Performance – Forms a hard nitride layer (≥850 HV) with excellent wear resistance.
✔ High Strength & Toughness – Maintains good mechanical properties even after heat treatment.
✔ Machinability & Weldability – Can be machined in annealed condition; pre-/post-weld heat treatment recommended.
✔ Thermal Stability – Resists softening at elevated temperatures.

Technical Specifications

Chemical Composition (GB/T 3077)

Element	C	Cr	Mo	Al	Mn	Si	P ≤	S ≤
% Range	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)

Property	Tensile Strength	Yield Strength	Elongation	Impact Toughness	Hardness (HB)
Value	≥980 MPa	≥835 MPa	≥14%	≥63 J	269–302

Post-Nitriding Surface Properties

Surface Hardness: 900–1100 HV
Nitride Layer Depth: 0.3–0.6 mm (adjustable via nitriding process)
Distortion Control: Low deformation due to controlled heat treatment.

Recommended Heat Treatment

Annealing (Optional for Machining): 840–860°C, slow cooling.
Quenching: 930–950°C (oil cooling).
Tempering: 600–650°C (air cooling).
Nitriding (Gas/Ion/Plasma): 500–540°C (time varies based on required case depth).

Global Equivalent Grades

Country	Standard	Equivalent Grade
USA	AMS	AMS 6470 (Nitraloy 135M)
Germany	DIN	31CrMoV9 (1.8509)
Japan	JIS	SACM645
Europe	EN	34CrAlNi7 (1.8550)

Typical Applications

Precision Gears & Transmission Parts
Hydraulic/Pneumatic Cylinder Rods
Plastic Injection Molding Screws & Barrels
Aerospace & Automotive High-Stress Components
Tooling & Fixtures Requiring Wear Resistance

Available Forms & Customization

Round Bars: Ø10mm – Ø300mm (standard), custom diameters available.
Surface Finish: Black, polished, or precision ground.
Certification: EN 10204 3.1, ISO 683-3, or customer-specific requirements.
Special Processing: Ultrasonic testing (UT), straightening, pre-cut lengths.

Why Choose Our 38CrMoAlA?

✅ Strict Quality Control – Fully traceable material batches.
✅ Competitive Lead Time – Stock availability for common sizes.
✅ Technical Support – Heat treatment & machining recommendations provided.

Differences from Previous Version:

More structured, application-focused (emphasizes machining, welding, and nitriding performance).
Expanded heat treatment details (includes annealing for machinability).
Clearer global equivalents table (improves cross-standard reference).
Stronger commercial appeal (highlights quality control and support).

Let me know if you'd like further adjustments (e.g., more ASTM-focused or additional testing details).

CNC Machining Grade 38CrMoAlA Alloy Steel Round Bar Alloy 31CrMoV9 / 1.8509 Steel Rod

Product Tags: