AISI 1144 Chemical Composition
The SAE 1144 chemical composition includes a high percentage of iron, enhanced by manganese and sulfur to improve machinability. This balanced composition makes 1144 carbon steel ideal for stress-resistance and high-strength applications.
| Element | Content (%) |
| Iron, Fe | 97.50 – 98.01 |
| Manganese, Mn | 1.35 – 1.65 |
| Sulfur, S | 0.240 – 0.330 |
| Carbon, C | 0.40 – 0.480 |
| Phosphorus, P | 0.040 |
AISI 1144 Stress Proof Steel Mechanical Properties
| Properties | Metric | Imperial |
| Tensile Strength | 745 MPa | 108000 psi |
| Yield Strength | 620 MPa | 89900 psi |
| Bulk Modulus (Typical for Steel) | 140 GPa | 20300 ksi |
| Shear Modulus (Typical for Steel) | 80.0 GPa | 11600 ksi |
| Elastic Modulus | 190–210 GPa | 27557–30458 ksi |
| Poisson’s Ratio | 0.27–0.30 | 0.27–0.30 |
| Elongation at Break | 10% | 10% |
| Reduction of Area | 30% | 30% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop | 240 | 240 |
| Hardness, Rockwell B | 95 | 95 |
| Hardness, Rockwell C | 17 | 17 |
| Hardness, Vickers | 228 | 228 |
AISI 1144 Steel Physical Properties
The physical characteristics of AISI 1144 steel contribute to its widespread usage across precision components. Below is the standard density for this material:
| Properties | Metric | Imperial |
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
This stable density aligns with what’s expected from 1144 carbon steel properties, especially when used in machining applications.
AISI 1144 Stress Proof Steel Thermal Properties
| Properties | Metric | Imperial |
| Thermal Conductivity | 49.8 W/m·K | 346 BTU in/hr·ft²·°F |
Its heat transfer capability supports applications requiring thermal reliability in 1144 fatigue proof steel components.
AISI 1144 Equivalent Material
- ASTM A29
- ASTM A311
- ASTM A510
- SAE J1397
- SAE J403
- SAE J412
Applications of AISI 1144 Stressproof Steel
- Automatic Machining Applications: Commonly selected for high-output manufacturing of parts that benefit from 1144 stressproof hardness and dimensional stability.
- Construction and Heavy Machinery: Extensively used in the production of shafts, arbors, gears, pinions, rods, bushings, sleeves, and spindles due to its combination of strength and machinability.
Advantages of AISI 1144 Steel Application
- Superior Machinability: The resulfurized nature of 1144 carbon steel reduces tool wear, enabling faster cutting speeds and tight tolerances in automated machining.
- Consistent Hardening Response: AISI 1144 steel responds uniformly to heat treatment, allowing controlled induction hardening for surface wear resistance.
- High Fatigue Strength: Excellent resistance to mechanical stress and cyclic loading, making 1144 stress proof steel suitable for rotating and vibrating parts.
- Moderate Corrosion Resistance: While not corrosion-proof, it offers fair resistance to oxidation in dry, indoor, or low-humidity environments.
- Elevated Yield and Tensile Strength: With a yield strength of ~620 MPa, 1144 carbon steel yield strength supports high-load, static, or dynamic applications.
- High Dimensional Stability: Low thermal expansion reduces deformation risk, supporting 1144 steel properties in precision fits and assemblies.
- Warp-Resistant Structure: Maintains shape during high-speed machining or minor thermal cycles due to internal grain structure.
- Cold-Finished Durability: Delivers high strength and toughness even without additional hardening which is ideal where 1144 fatigue proof steel is required without added processing.
Partner with Kalpataru Piping Solutions for High-Quality Carbon Steel
For reliable sourcing of premium carbon steel materials, Kalpataru Piping Solutions. offers a trusted solution. With decades of industry experience, we supply cold-finished carbon steel grades including 1144 carbon steel, 1018, 1214, 1215, and 1045 to meet a wide range of industrial needs. Our well-maintained inventory allows us to fulfill urgent requirements with prompt dispatch and flexible logistics.
All our materials, including AISI 1144, comply with strict ASTM specifications and recognized quality benchmarks. Get in touch with our team or request a quote today to begin your next project with a dependable carbon steel supplier.
