ASTM A519 4130 Chromoly Steel Pipes: High-Strength Tubing for Aerospace & Heavy Machinery.
Seamless Quenched & Tempered Pipes (10–426mm OD, 1–100mm WT) with ±1% Dimensional Precision.
Manufactured to ASTM A519, AMS 6349, and EN 10297 standards, 4130 chromoly steel pipes offer 930 MPa tensile strength post-quenching, ideal for high-stress applications. Available in 3–12m lengths (customizable) with black, polished, or machined surfaces, these pipes support 15–20% weight reduction vs. carbon steel in aerospace and automotive systems.
Key Features:
- Temperature Resistance: -50°C to 500°C (-58°F to 932°F)
- Pressure Rating: 25–100 MPa (3,625–14,500 psi)
- Certifications: NADCAP AC7114, ISO 9001:2015, PED 2014/68/EU
Technical Specifications
Dimensional Tolerances:
- Outer Diameter: ±1% (ASTM A519)
- Wall Thickness: ±10%/-5% (ASME B36.10M)
- Straightness: ≤1.2mm/m (AMS 6349)
Mechanical Properties (Quenched & Tempered):
- Yield Strength: 670 MPa (97,000 psi)
- Tensile Strength: 930 MPa (135,000 psi)
- Elongation: ≥18%
- Hardness: 22–28 HRC
- Charpy Impact (ASTM E23): ≥40 J at -40°C
Material Composition
Chemical Analysis (ASTM A519 4130):
- Carbon: 0.28–0.33%
- Chromium: 0.80–1.10%
- Molybdenum: 0.15–0.25%
- Manganese: 0.40–0.60%
- Silicon: 0.15–0.35%
Heat Treatment Process:
- Quenching: Oil-cooled at 870°C (1,598°F) for uniform hardness.
- Tempering: 540–675°C (1,004–1,247°F) to balance strength/toughness.
- NDT: Ultrasonic testing (ASTM E213) for flaw detection.
Applications & Performance
- Aircraft Landing Gear:
- 150mm OD, 8mm WT: 75 MPa hydraulic lines (AMS 6349 compliant).
- Drill Collars & Shafts:
- 89mm OD, 12mm WT: 90 MPa torque transmission in oil rigs.
- High-Pressure Conduits:
- 50mm OD, 5mm WT: Hydrogen service at 250°C (ASME B31.3).
Advantages vs. Competitors:
- Fatigue Life: 2x longer than AISI 1045 under cyclic loads.
- Weldability: Pre-heat to 150–260°C (302–500°F) for crack-free joints.
Quality Assurance & Packaging
- Testing Protocols:
- Hydrostatic Test: 1.5×MAOP for 10 seconds (ASTM A519).
- Hardness Mapping: 15-point inspection per batch.
- Surface Protection:
- VCI paper + anti-rust oil coating (MIL-PRF-16173).
- Export Packaging:
- Steel-strapped bundles with corner guards (max 3 tons).
Packing And Delivery
