AISI / SAE 1042 Round Bar (UNS G10420)
AISI / SAE 1042 Round Bar is a medium-carbon steel offering higher strength, hardness, and wear resistance than 1040 grade steels. With good response to heat treatment, it is widely used in automotive, machinery, and heavy engineering applications where improved mechanical performance is required.
Key Features
- Medium carbon steel with enhanced strength and hardness
- Good wear and abrasion resistance
- Suitable for quenching and tempering
- Good machinability in normalized condition
- Reliable performance under moderate to high stress
- Economical material for heavy-duty components
Equivalent Grades
| Standard | Equivalent |
|---|---|
| AISI / SAE | 1042 |
| UNS | G10420 |
| EN | C42 |
| DIN | 1.0540 |
| IS | IS 1570 Gr 42C8 |
Sizes
- Diameter: 6 mm to 350 mm
- Length: Random, Cut Length, or as per customer requirement
AISI / SAE 1042 Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.40 – 0.45 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
SAE 1042 Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 650 – 800 MPa |
| Yield Strength | ≥ 370 MPa |
| Elongation | ≥ 14% |
| Hardness | ~ 190 – 220 HB |
UNS G10420 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1460 °C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 47 W/m·K |
Types of 1042 Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Normalized Carbon Steel Bar
- Quenched & Tempered Bar
Applications
- Automotive axles and crankshafts
- Gears, shafts, and pinions
- Heavy-duty machine components
- Forged engineering parts
- Couplings and spindles
- Industrial machinery applications
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