AISI 4130 4140 CDS Structural Mahinery Honed Alloy Seamless Steel Tube

Customization: Available
Type: Seamless
Technique: Cold Drawn

Product Description

📦 Basic Information
Material:Alloy Steel
Surface Treatment:Slightly Oiled
Section Shape:Round
Steel Grade:4130 / 30CrMo / 4140 / 42CrMo
Standard:ASTM A519
Specification:OD 2-60mm
HS Code:7304511001
Origin:China
📷 Detailed Photos
📝 Product Description

Standard: ASTM A519

Material: 4130 / 4140

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

Description: 4140/42 and 4130 Mechanical Tubing are medium carbon alloy grades with chromium and molybdenum, providing excellent hardness, ductility, and tensile strength after heat treatment.

🚀 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
🛠️ Main Applications
  • Commercial aircraft & engine mounts
  • Automotive & Auto Parts
  • Machine and Hydraulic tools
  • Auto racing & Aerospace
  • Oil and gas industries (valve bodies/pumps)
  • Agricultural and defense industries
📊 Technical Standards
Material Chemical Composition (%)
StandardSteel GradeCSiMnPSCrMo
ASTM A5194130/30CrMo0.28-0.330.15-0.350.40-0.60≤0.04≤0.040.8-1.10.15-0.25
4140/42CrMo0.38-0.430.15-0.350.75-1≤0.04≤0.040.8-1.10.15-0.25
Mechanical Performance
SR (Stress Relieved)A (Annealed)N (Normalized)
RM Tensile (Mpa)Elongation %RM Tensile (Mpa)Yield (Mpa)Elongation %RM Tensile (Mpa)Yield (Mpa)Elongation %
724105173793062144120
🏭 Manufacture Process
🚢 Packaging & Shipping
❓ Frequently Asked Questions (FAQ)
Q1: What are the main steel grades available for these tubes? A: We primarily offer AISI 4130, 4140, 30CrMo, and 42CrMo alloy steel grades according to ASTM A519 standards.
Q2: What delivery conditions can be provided? A: Tubes can be delivered in several conditions including Cold Drawn (+C), Stress Relieved (+SR), Annealed (+A), Normalized (+N), and Quenched & Tempered (QT).
Q3: In which industries are these tubes typically used? A: They are widely used in automotive parts, aerospace engine mounts, hydraulic tools, oil and gas forged valve bodies, and the machinery industry.
Q4: What is the size range for these seamless steel tubes? A: The outer diameter (OD) ranges from 2mm to 60mm.
Q5: What surface treatment is applied to the tubes? A: The standard surface treatment is slightly oiled to prevent rust during transport and storage.
Q6: Are the products certified? A: Yes, our production processes follow ISO 9001 and TS16949 quality management systems to ensure high-standard precision.

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