SAE 4140 Bright Bars
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SAE 4140 Bright Bar – Chemical Composition
| Element | Percentage |
|---|---|
| Carbon (C) | 0.38 – 0.43 |
| Manganese (Mn) | 0.75 – 1.00 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 – 0.35 |
| Chromium (Cr) | 0.80 – 1.10 |
| Molybdenum (Mo) | 0.15 – 0.25 |
SAE 4140 Bright Bar – Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1460°C |
| Thermal Conductivity | 45.9 W/m·K |
| Elastic Modulus | 190-210 GPa |
| Poisson’s Ratio | 0.27-0.30 |
SAE 4140 Bright Bar – Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 565 MPa |
| Yield Strength | 355 MPa |
| Elongation | 18% |
| Reduction of Area | 50% |
| Impact Energy | 35 J |
| Hardness (Brinell) | 217-269 HB |
SAE 4140 Bright Bar – Available Shapes & Sizes
| Shape | Size Range |
|---|---|
| Round Bar | 6 mm – 500 mm |
| Flat Bar | Thickness: 3 mm – 100 mm, Width: 25 mm – 600 mm |
| Hexagonal Bar | 6 mm – 55 mm |
| Square Bar | 6 mm – 120 mm |
| Plate | Thickness: 6 mm – 200 mm, Width: 900 mm – 3000 mm |
| Sheet | Thickness: 0.5 mm – 6 mm, Width: 900 mm – 2000 mm |
| Strip | Thickness: 0.5 mm – 3 mm, Width: 25 mm – 600 mm |
| Wire | 0.5 mm – 10 mm |
SAE 4140 Bright Bar – Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| AISI | 4140 |
| DIN | 1.7225 |
| JIS | SCM440 |
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