JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
WUXI DETA METAL PRODUCTS CO.,LTD
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Products Specification
| Products Name | SAE4145 Alloy Steel Round Bar |
| Diameter | 10 - 350 mm |
| Length | 6m or custom cutting any length as request |
| Type | Hot Rolled |
| Brand | BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc |
| MOQ | 1 Ton |
| Loading Port | Shanghai Port |
| Packing | packing by steel wire rope |
| Deliver time | 5 - 7 days for stock materials |
| Other Grade | Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo,304,3 16,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,5CrMnMo |
| Standard | ASTM GB EN DIN |
| Application | Structure and Industrial |
Regular Standard Size of our Round Bar in Stock
| Standard Diameter | 10 12 15 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 180 200 210 220 230 250 270 300 |
About 4145 Steel Round Bar
4145 is a low alloy chromium molybdenum steel similar to 4140 but with amended analysis which contributes towards its increased hardenability at larger diameters. 4145 steel bars are popular in larger diameters due to this increased strength and hardenability.
4145 alloy steel can be easily forged, machined and welded. It can also be heat treated to a wide range of strength and ductility levels. This forged bar stock is used in many oil and gas application including as forged down-hole drilling tools.
AISI 4145 is a low-alloy steel grade containing 0.45% carbon, 0.75% manganese, 1.00% chromium, 0.20% molybdenum, and 0.15% vanadium. The alloying elements enhance their mechanical and physical properties, such as strength and toughness. Additionally, the alloy’s controlled composition enables it to be quenched and tempered to improve its hardness and wear resistance.
| Element | Content (%) |
|---|---|
| Iron, Fe | 96.795-97.72 |
| Chromium, Cr | 0.800-1.10 |
| Manganese, Mn | 0.750-1.00 |
| Carbon, C | 0.430-0.480 |
| Molybdenum, Mo | 0.150-0.250 |
| Silicon, Si | 0.150-0.300 |
| Sulfur, S | ≤ 0.0400 |
| Phosphorous, P | ≤ 0.0350 |
AISI 4145 exhibits excellent strength, toughness, and wear resistance as a low-alloy steel grade. The minimum yield strength of AISI 4145 is 89 KSI, while the ultimate tensile strength is between 125-140 KSI, depending on the heat treatment conditions. The alloy’s high toughness and fatigue resistance make it an ideal choice for manufacturing critical components, including drill collars and heavy-duty shafts.
AISI 4145 Physical Properties
AISI 4145 has a density of 7.85 g/cm3 and a melting point of 1424°C (2580°F). Its coefficient of thermal expansion is 11.2 µm/mK and has a thermal conductivity of 42.6 W/mK. The alloy’s physical properties remain stable within a broad temperature range, making it an ideal choice for high-temperature applications.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
| ASTM A29 | ASTM A322 | ASTM A331 | ASTM A519 | ASTMA711 |
| ASTM A752 | ASTM A829 | SAE J1397 | SAE J404 | SAE J412 |
| ASTM A505 | SAE J770 | MIL SPEC MIL-S-16974 |
AISI 4145 finds application in various heavy-duty and high-stress applications. In the energy sector, it is used for manufacturing drilling tools, pump shafts, and other components used in exploration and production activities. It also finds extensive use in the aerospace and defence sectors for manufacturing gears, shafts, and other critical components. Its excellent corrosion resistance and strength make it an ideal choice for seawater-drenched components, including marine motor shafts and other offshore applications.
AISI 4145 can be subjected to various heat treatment processes to modify its mechanical and physical properties. The most common form of heat treatment for AISI 4145 is quenching and tempering, which involves heating the steel to a temperature of 927°C (1700°F) and cooling it rapidly in a quenching medium such as water, oil or air. The steel is then tempered to refine its mechanical properties.
AISI 4145 is a moderately difficult steel machine that can be machined successfully using the right equipment and techniques. The alloy’s moderate hardness and toughness require high cutting forces, and sharp cutting tools and minimum chip loads are necessary to avoid tool wear and premature failure. Cutting fluids is highly recommended to prevent overheating and prolong tool life.
AISI 4145 is an alloy steel that is commonly used for welding components. Its hardenability and wear resistance suit various applications, including heavy machinery, construction and automotive parts. Additionally, its high-strength properties allow for higher performance in challenging conditions when compared to other steels.
