| Quantity: | |
|---|---|
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.43–0.50 |
| Silicon (Si) | 0.20–0.40 | |
| Manganese (Mn) | 0.60–0.90 | |
| Phosphorus (P) | ≤0.04 | |
| Sulfur (S) | ≤0.05 | |
| Mechanical Properties | Tensile Strength (MPa) | ≥532 |
| Yield Strength (MPa) | ≥280 | |
| Elongation (%) | ≥32 | |
| Reduction of Area (%) | ≥49 | |
| Charpy Impact (J) | ≥60 | |
| Hardness (HBW) | 160–200 | |
| Physical Properties | Density (g/cm³) | 7.86 |
| Melting Point (℃) | 1433 | |
| Specific Heat Capacity (J/kg·K) | 577.78 (at 200℃) | |
| Linear Expansion Coefficient (10⁻⁶/K) | 11.7 (0–100℃) | |
| Poisson's Ratio | 0.269 | |
| Elastic Modulus (MPa) | 209,000 | |
| Shear Modulus (MPa) | 82,300 | |
| Thermal Conductivity (W/m·K) | 46.89 (at 200℃) | |
| Electrical Resistivity (10⁻⁸ Ω·m) | 32.0 (at 200℃) | |
| Heat Treatment | Ac1 | 724℃ |
| Ac3 | 780℃ | |
| Ar1 | 682℃ | |
| Ar3 | 751℃ | |
| Forging | Process Description | SAE1045 can be forged at high temperatures and further heat-treated (quenching & tempering) to enhance hardness and toughness. |
Excellent Strength–Toughness Balance
SAE 1045 delivers high tensile strength and impact resistance in normalized or forged conditions, making it ideal for demanding mechanical components
Good Machinability
With a medium-carbon formulation, it machines very cleanly in annealed or normalized states, enabling efficient production and consistent finishes
Reliable Weldability
Capable of being welded when using proper procedures (e.g. pre‑heating and low‑hydrogen electrodes), it supports joined parts without excessive brittleness
Outstanding Cost‑Performance Ratio
Compared to alloy steels like 4140, SAE 1045 offers comparable performance at a lower cost due to its simple composition and wide availability
Versatile Application Suitability
Used in shafts, axles, gears, bolts, crankshafts, torsion bars and machined guide rods, it fits a wide range of industrial and automotive applications
Automotive Components
Widely used for crankshafts, connecting rods, axles, gears, and spindles that require high strength, toughness, and wear resistance
Machinery Parts & Shafts
Ideal for industrial shafts, studs, pins, hydraulic clamp rods, and fasteners thanks to its excellent machinability and moderate cost
Gears & Light Mechanical Couplings
Used in light gears, guide rods, torsion bars, couplings, and yokes where dynamic loads and precision machining are essential
Construction & Agricultural Equipment
Suitable for structural pins, anchor bolts, plow components, farm machinery parts, and wear‑resistant tools in moderate stress environments
A: SAE1045 is widely used for axles, shafts, gears, crankshafts, and machine parts requiring high strength and toughness.
A: Yes, it can be welded with proper preheating and post-weld treatment to prevent cracking.
A: Absolutely. It responds well to heat treatments like quenching and tempering for enhanced hardness and durability.
A: SAE1045 offers good machinability in its normalized or annealed condition, making it ideal for high-volume production.
| Category | Parameter | Value |
| Chemical Composition | Carbon (C) | 0.43–0.50 |
| Silicon (Si) | 0.20–0.40 | |
| Manganese (Mn) | 0.60–0.90 | |
| Phosphorus (P) | ≤0.04 | |
| Sulfur (S) | ≤0.05 | |
| Mechanical Properties | Tensile Strength (MPa) | ≥532 |
| Yield Strength (MPa) | ≥280 | |
| Elongation (%) | ≥32 | |
| Reduction of Area (%) | ≥49 | |
| Charpy Impact (J) | ≥60 | |
| Hardness (HBW) | 160–200 | |
| Physical Properties | Density (g/cm³) | 7.86 |
| Melting Point (℃) | 1433 | |
| Specific Heat Capacity (J/kg·K) | 577.78 (at 200℃) | |
| Linear Expansion Coefficient (10⁻⁶/K) | 11.7 (0–100℃) | |
| Poisson's Ratio | 0.269 | |
| Elastic Modulus (MPa) | 209,000 | |
| Shear Modulus (MPa) | 82,300 | |
| Thermal Conductivity (W/m·K) | 46.89 (at 200℃) | |
| Electrical Resistivity (10⁻⁸ Ω·m) | 32.0 (at 200℃) | |
| Heat Treatment | Ac1 | 724℃ |
| Ac3 | 780℃ | |
| Ar1 | 682℃ | |
| Ar3 | 751℃ | |
| Forging | Process Description | SAE1045 can be forged at high temperatures and further heat-treated (quenching & tempering) to enhance hardness and toughness. |
Excellent Strength–Toughness Balance
SAE 1045 delivers high tensile strength and impact resistance in normalized or forged conditions, making it ideal for demanding mechanical components
Good Machinability
With a medium-carbon formulation, it machines very cleanly in annealed or normalized states, enabling efficient production and consistent finishes
Reliable Weldability
Capable of being welded when using proper procedures (e.g. pre‑heating and low‑hydrogen electrodes), it supports joined parts without excessive brittleness
Outstanding Cost‑Performance Ratio
Compared to alloy steels like 4140, SAE 1045 offers comparable performance at a lower cost due to its simple composition and wide availability
Versatile Application Suitability
Used in shafts, axles, gears, bolts, crankshafts, torsion bars and machined guide rods, it fits a wide range of industrial and automotive applications
Automotive Components
Widely used for crankshafts, connecting rods, axles, gears, and spindles that require high strength, toughness, and wear resistance
Machinery Parts & Shafts
Ideal for industrial shafts, studs, pins, hydraulic clamp rods, and fasteners thanks to its excellent machinability and moderate cost
Gears & Light Mechanical Couplings
Used in light gears, guide rods, torsion bars, couplings, and yokes where dynamic loads and precision machining are essential
Construction & Agricultural Equipment
Suitable for structural pins, anchor bolts, plow components, farm machinery parts, and wear‑resistant tools in moderate stress environments
A: SAE1045 is widely used for axles, shafts, gears, crankshafts, and machine parts requiring high strength and toughness.
A: Yes, it can be welded with proper preheating and post-weld treatment to prevent cracking.
A: Absolutely. It responds well to heat treatments like quenching and tempering for enhanced hardness and durability.
A: SAE1045 offers good machinability in its normalized or annealed condition, making it ideal for high-volume production.
