38CrMoAlA/1.8509 Alloy Round Bar Heat Treated for Enhanced Performance

Products Specification

Standard Size of our Steel Round Bar In Stock

38CrMoAlA/1.8509 Alloy Steel Round Bar

Material Standard: DIN 1.8509 / GB/T 3077 (Equivalent to Chinese Standard)

Overview

38CrMoAlA (DIN 1.8509) is a high-quality chromium-molybdenum-aluminum alloy steel specifically designed for nitriding treatment. It exhibits exceptional surface hardness, wear resistance, and fatigue strength after nitriding, making it ideal for high-stress components requiring superior durability and dimensional stability.

Chemical Composition

Mechanical Properties (After Heat Treatment)

• Tensile Strength: 980-1180 MPa

• Yield Strength: ≥ 835 MPa

• Elongation: ≥ 14%

• Reduction of Area: ≥ 50%

• Impact Energy (Charpy): ≥ 63 J

• Surface Hardness (Post-Nitriding): 900-1000 HV

Heat Treatment

• Normalizing: 870-900°C, air-cooled

• Quenching: 930-950°C, oil-cooled

• Tempering: 600-650°C, air-cooled (adjustable based on required hardness)

• Nitriding: Recommended for achieving ultra-high surface hardness (e.g., gas nitriding at 500-530°C).

Key Applications

• Precision gears, shafts, and spindles

• High-wear components (e.g., cylinder liners, piston rods)

• Injection molds and tooling requiring nitrided surfaces

• Aerospace and automotive high-strength fasteners

• Hydraulic/pneumatic system components

Product Specifications

• Diameter Range: 10 mm – 300 mm (custom sizes available)

• Length: 3,000 mm – 6,000 mm (cut-to-length service provided)

• Surface Condition: Black, polished, or precision machined (as per request)

• Tolerances: DIN h9/h11 or customized

Packaging & Delivery

• Standard Packaging: Anti-rust oil coating + waterproof paper + wooden crates

• Certification: Mill test certificates (EN 10204 3.1/3.2) provided

• MOQ: 1 ton (smaller trial orders negotiable)

Quality Assurance

• Full traceability with heat number identification.

• Compliance with ISO 683-3, ASTM A29, and DIN EN 10083-3 standards.

• Ultrasonic testing (UT) and magnetic particle inspection (MPI) available.

Notes:

• Custom heat treatment and machining services (e.g., turning, grinding) are available.

• Technical support for nitriding process optimization provided.