AISI 4140 Alloy Steel UNS G41400
AISI 4140 is a chromium-molybdenum alloy steel with American standards, which is implemented in accordance with ASTM A29/A29M-04. This material performs excellently in mechanical properties, possessing high strength, hardness, and quenchability, along with good low-temperature impact toughness and good high-temperature creep strength and fatigue strength.
Description
Product Application
AISI 4140 Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium, Cr | 0.80 - 1.10 |
| Manganese, Mn | 0.75 - 1.0 |
| Carbon, C | 0.380 - 0.430 |
| Silicon, Si | 0.15 - 0.30 |
| Molybdenum, Mo | 0.15 - 0.25 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
| Iron, Fe | Balance |
The advantages of AISI 4140 include its strength and quenchability. This material can obtain relatively uniform hardness after quenching, and has good wear resistance and fatigue resistance. Additionally, its corrosion resistance and oxidation resistance are also excellent. However, its disadvantages also need attention. For example, its toughness is relatively low, and it may become brittle in low-temperature environments or oxidize at high temperatures.
AISI 4140 is widely used in manufacturing high-strength and wear-resistant parts and components such as high-strength bolts, shafts, gears, and sprockets. Additionally, due to its good mechanical properties and corrosion resistance, AISI 4140 is also commonly used to manufacture parts and tools that require higher strength, such as components that operate at high temperatures and tools that require high precision and longevity.
In the international scope, various countries have corresponding grades for AISI 4140. For example, in European EN standards, the corresponding grade for AISI 4140 is 1.7107 steel; in China, according to Chinese national standards GB/T 3077-2015, the corresponding grade for AISI 4140 is 42CrMo steel. These corresponding relationships facilitate communication and cooperation among different countries' industries and enterprises.
Overall, AISI 4140 is a chromium-molybdenum alloy steel with high strength, quenchability, and wear resistance, mainly used for manufacturing parts and components that require high strength, wear resistance, and corrosion resistance. Its chemical composition, mechanical properties, and applications correspond to clear corresponding relationships in various national standards, providing convenience for international cooperation and communication. However, this material also has some disadvantages such as low toughness, so attention should be paid to its applicable scope during use.
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