Cold Drawn/Draw Precision 10mm 12mm Heat Treatment Chromoly motorcycle Automotive Parts 4130 4140 30CrMo 42CrMo Chrome Moly Alloy Seamless Steel Tube

Customization: Available
Type: Seamless
Technique: Cold Drawn

Product Description

📊 Basic Information
Model NO.
ALS-17
Material
Alloy Steel
Surface
Slightly Oiled
Section Shape
Round
Steel Grade
4130 / 30CrMo / 4140 / 42CrMo
Standard
ASTM A519
Specification
OD2-60mm
Certificate
ISO 9001, Ts16949
📷 Detailed Product Photos
🛠️ Product Characteristics

Material Advantage: Alloy steel round 4140 tubing (Chromoly steel) is renowned for its exceptional strength, resistance to fracturing, abrasion, and impact in high-stress industrial applications.

Performance: 4140/42 and 4130 Mechanical Tubing are medium carbon alloy grades. The combination of chromium and molybdenum alloying elements with specialized heat treatment ensures a perfect balance of hardness, ductility, and tensile strength.

⚙️ Delivery Conditions
  • Cold drawn/hard (+C) (BK)
  • Cold drawn/soft (+LC) (BKW)
  • Cold drawn and stress relieved (+SR) (BKS)
  • Annealed (+A) (GBK)
  • Normalized (+N) (NBK)
  • Quenched and Tempered (QT)
Key Advantages
Advantages of Alloy Steel Tube
🚀 Wide Applications
  • Commercial & Military Aircraft
  • Aircraft Engine Mounts
  • Automotive & Auto Racing Parts
  • Machine & Hydraulic Tools
  • Aerospace Engineering
  • Forged Valve Bodies & Pumps
  • Agricultural & Defense Industries
  • Oil and Gas Infrastructure
📋 Technical Specifications
Material Chemical Composition (%)
Standard Steel Grade C Si Mn P S Cr Mo
ASTM A519 4130/30CrMo 0.28-0.33 0.15-0.35 0.40-0.60 ≤0.04 ≤0.04 0.8-1.1 0.15-0.25
4140/42CrMo 0.38-0.43 0.15-0.35 0.75-1 ≤0.04 ≤0.04 0.8-1.1 0.15-0.25
Mechanical Performance
SR (Stress Relieved) A (Annealed) N (Normalized)
Tensile (Mpa) Elongation(%) Tensile (Mpa) Yield (Mpa) Elongation(%) Tensile (Mpa) Yield (Mpa) Elongation(%)
724 10 517 379 30 621 441 20
855 10 552 414 25 855 621 20
🔄 Manufacture Process
Manufacture Process Flow
📦 Packaging & Shipping
Packaging and Shipping
Frequently Asked Questions
What materials are available for these precision tubes?
We primarily offer high-quality alloy steel grades including 4130, 4140, 30CrMo, and 42CrMo, all complying with the ASTM A519 standard.
What are the typical applications for Chromoly 4140 tubing?
Due to its high strength and impact resistance, it is widely used in automotive parts, motorcycle frames, aircraft engine mounts, and hydraulic tools.
In what conditions can the tubes be delivered?
Tubes can be delivered in various conditions: Cold Drawn (BK), Soft (BKW), Stress Relieved (BKS), Annealed (GBK), Normalized (NBK), or Quenched and Tempered (QT).
What is the size range for these seamless steel tubes?
Our specification covers an Outer Diameter (OD) range from 2mm to 60mm, suitable for high-precision mechanical needs.
Are the products certified for quality?
Yes, the manufacturing processes are certified under ISO 9001 and TS16949 quality management systems to ensure consistent high performance.
How are the tubes protected during shipping?
The tubes are slightly oiled for rust prevention and securely packed in bundles or wooden boxes to ensure they arrive in perfect condition.

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