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4140 belongs to alloy structural steel and follows the following standards: ASTM A29/A29M-04, Chinese standards: GB/T 3077
4140 belongs to the American grade equivalent to the 42CrMo grade in China. This type of steel belongs to medium hardenability steel, with a carbon content of 0.33% -0.48%, a tensile strength of 795 megapascals, a hardness of 241HB, etc. It has the advantages of high yield, good comprehensive mechanical properties, good strength, good toughness, and high hardenability. It can be used to make fasteners for steam turbines, fishing tools, and so on
4140 features 4140 steel, which has good workability, minimal deformation during processing, and excellent fatigue resistance. It belongs to the category of medium to high hardenability steel. After heat treatment, 4140 has good strength and comprehensive mechanical properties, good processability, and high yield The high operating temperature is 427 degrees Celsius. It has a strength of 4140, high hardenability, good toughness, small deformation during quenching, and high creep strength and endurance strength at high temperatures.
4140 Chemical Composition
Carbon (C) 0.38-0.45 Silicon (Si) 0.17-0.37 provides 4140 alloy structural steel Manganese (Mn) 0.50-0.80 Phosphorus
(P) ≤ 0.035 Sulfur (S) ≤ 0.035 Chromium (Cr) 0.9-1.20 Nickel (Ni) ≤ 0.30 Molybdenum (Mo) 0.15-0.25 Copper (Cu) ≤ 0.30
Alloy materials are used to manufacture forgings that require higher strength and larger quenched and tempered sections than 35CrMo steel, such as large gears for locomotive traction, booster transmission gears, rear axles, connecting rods and spring clips that are heavily loaded. They can also be used for oil well drill pipe joints and salvage tools below 2000m, and can be used for molds for bending machines.
Chemical element composition (%)
| Composition | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | More |
| Min. | 0.38 | 0.15 | 0.75 | - | - | 0.8 | - | - | 0.15 | |
| Max | 0.43 | 0.35 | 1 | 0.035 | 0.04 | 1.1 | 0.25 | 0.35 | 0.25 |
| Thickness mm |
Tensile strength σb Mpa |
Yield strength σs Mpa |
Elongation δ % |
Hardness HBW |
| t=25 | ≥1080 |
Quenching tempering ≥930 |
Quenching tempering ≥12 |
HB ≤217 |
| Japan | South Korea | USA | International Standard Organization |
German | France | European | Sweden | English | ||||
| CNS | JIS | KS | ASTM/AISI | UNS | ISO | DIN EN/DIN | W-Nr. | NF EN/NF | EN | SS14 | BS EN/BS | |
| SCM440 | SCM440 SCM440H |
SCM440 | 4140 4142 |
G41400 G41420 |
42CrMo4 | 42CrMo4 | 1.7225 | 42CD4 | 42CrMo4 | 1.7225 | 2244 | 708M40 |
| Executive Standard | Grade / Material | Product Name |
| ASTM A53 | A, B | Black and Hot-Dipped Zinc-Coated Steel Pipes Welded and Seamless |
| ASTM A106 | A, B | Seamless Carbon Steel for High Temperature Service |
| ASTM A179 | Low Carbon Steel | Seamless Cold-Drawn Low-Carbon Steel Heat Exchanger and Condenser Tubes |
| ASTM A192 | Low Carbon Steel | Seamless Carbon Steel Boiler Tubes for High Pressure |
| ASTM A210 | A1, C | Seamless Medium-Carbon and Alloy Steel Boiler and Super heater Tubes |
| ASTM A213 | T5, T11, T12, T22 TP 347H |
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat- Exchanger Tubes |
| ASTM A312 | TP304/304L, TP316/316L | Seamless Steel Pipe for Stainless Materials |
| ASTM A333 | Gr.6 | Seamless and Welded Steel Pipe for Low-Temperature Service |
| ASTM A335 | P9, P11, P22 | Seamless Ferritic Alloy Steel Pipe for High-Temperature Service |
| ASTM A519 | 4130,4140 | Seamless Carbon and Alloy Steel for Mechanical Tubing |
| ASTM A789 | Seamless Ferritic/Austenitic Stainless Steel Tubing for General Service |
Packing Details : Bundle with steel strip Delivery Details : Use trays to facilitate loading and unloading Standard Export Seaworthy Package.Suit for all kinds of transport,or as required
20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
20feet container load 25tons coils whose length is under 5.8m
40feet container load 25tons coils whose length is under 11.8m
1. who are we?
We are based in Jiangsu, China, start from 2022,sell to Africa(28.00%),South America(25.00%),Southeast Asia(16.00%),South Asia(15.00%),Oceania(4.00%),Mid East(3.70%),North America(3.00%),Eastern Europe(2.00%),Eastern Asia(1.20%),Northern Europe(1.00%),Central America(0.60%),Domestic Market(0.50%). There are total about 11-50 people in our office.
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stainless coil,Alumium coil,copper coil,brass coil,lead sheet
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