🔍 Product Overview
ASTM A829 Grade 4140 steel plate is a versatile, high-strength alloy known for its excellent wear resistance and toughness. Comprising chromium and molybdenum, this medium-carbon steel offers enhanced hardenability and strength, making it suitable for various industrial applications. It is available in multiple heat treatment conditions, including as-rolled, annealed, normalized, and quenched & tempered. Mill test reports accompany each order, ensuring quality and compliance.
📊 Technical Specifications
Property | Value |
---|---|
Standard | ASTM A829 |
Grade | 4140 |
Thickness Range | 1/4″ – 6″ (6.35mm – 152.4mm) |
Width Range | 36″ – 96″ (914mm – 2438mm) |
Length Range | Up to 240″ (6096mm) |
Heat Treatment Options | As-rolled, Annealed, Normalized, Quenched & Tempered |
Yield Strength | ≥ 620 MPa (90 ksi) |
Tensile Strength | ≥ 825 MPa (120 ksi) |
Elongation | ≥ 15% |
Hardness (Brinell) | 207 – 285 HB |
🧪 Chemical Composition
Element | Composition (%) |
---|---|
Carbon (C) | 0.36 – 0.44 |
Manganese (Mn) | 0.75 – 1.00 |
Phosphorus (P) | ≤ 0.030 |
Sulfur (S) | ≤ 0.040 |
Silicon (Si) | 0.15 – 0.35 |
Chromium (Cr) | 0.80 – 1.10 |
Molybdenum (Mo) | 0.15 – 0.25 |
⚖️ Comparative Analysis: ASTM A829 4140 vs. ASTM A514
Feature | ASTM A829 4140 | ASTM A514 |
---|---|---|
Composition | Cr-Mo Alloy | High-Yield Alloy |
Yield Strength | ≥ 620 MPa (90 ksi) | ≥ 690 MPa (100 ksi) |
Tensile Strength | ≥ 825 MPa (120 ksi) | ≥ 760 MPa (110 ksi) |
Hardness (Brinell) | 207 – 285 HB | 235 – 293 HB |
Formability | Good | Moderate |
Weldability | Requires Pre/Post-Heat Treatment | Good |
Applications | Machinery, Shafts, Gears | Structural Components, Bridges |