AISI 4140H Steel
Products Description AISI 4140H steel is a widely used alloy steel known for its excellent mechanical properties and versatility. This steel is composed of iron, carbon, chromium, molybdenum, and other alloying elements. The addition of these elements gives AISI 4140H its unique characteristics....
Description
Products Description
AISI 4140H Steel Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 96.585 - 97.93 |
| Chromium, Cr | 0.75 - 1.2 |
| Manganese, Mn | 0.65 - 1.1 |
| Carbon, C | 0.37 - 0.44 |
| Molybdenum, Mo | 0.15 - 0.3 |
| Silicon, Si | 0.15 - 0.3 |
| Sulfur, S | ≤0.040 |
| Phosphorous, P | ≤0.035 |
AISI 4140H Steel Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in3 |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 1150 MPa | 167000 psi |
| Yield strength | 1050 MPa | 152000 psi |
| Modulus of elasticity | 205 GPa | 29700 ksi |
| Bulk modulus | 140 GPa | 20300 ksi |
| Shear modulus | 80 GPa | 11600 ksi |
| Poisson's ratio | 0.29 | 0.29 |
| Elongation at break | 17.50% | 17.50% |
| Reduction of area | 55% | 55% |
| Hardness, Brinell | 341 | 341 |
| Hardness, Vickers | 361 | 361 |
| Hardness, Knoop | 369 | 369 |
| Hardness, Rockwell C | 37 | 37 |
| Hardness, Rockwell B | 99 | 99 |
In terms of mechanical properties, AISI 4140H steel has a high tensile strength, which allows it to withstand heavy loads and stress. It also has good ductility, enabling it to be deformed without fracturing. The hardness of this steel can be adjusted through heat treatment, making it suitable for different applications that require specific hardness levels.
AISI 4140H steel is commonly used in the manufacturing of machinery parts, such as shafts, gears, and bolts. It is also used in the construction industry for structural components. Its corrosion resistance is relatively good, especially when properly coated or treated.
To ensure the quality of AISI 4140H steel, strict quality control measures are implemented throughout the production process. These measures include careful selection of raw materials, precise control of the alloying process, and rigorous testing of the finished product.
During the production of AISI 4140H steel, the raw materials are carefully inspected to ensure their purity and quality. The alloying elements are added in the correct proportions to achieve the desired properties. The melting and casting processes are closely monitored to ensure uniformity and proper solidification.
After casting, the steel is subjected to various heat treatment processes to optimize its mechanical properties. These processes include quenching and tempering, which can enhance the strength and toughness of the steel. The heat treatment parameters are carefully controlled to ensure consistent results.
In addition to heat treatment, the finished AISI 4140H steel is tested for its mechanical properties, chemical composition, and dimensional accuracy. Tensile tests, hardness tests, and chemical analysis are performed to ensure that the steel meets the required specifications. Dimensional inspections are also carried out to ensure that the parts made from this steel will fit properly.
Overall, AISI 4140H steel is a reliable and high-performance alloy steel. With proper quality control measures in place, it can be produced to meet the demanding requirements of various industries. Whether used in machinery manufacturing or construction, AISI 4140H steel offers excellent strength, toughness, and durability.
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