AISI 4140 Steel Coil, JIS SCM440, DIN 1.7225
AISI 4140 steel coil is an alloy steel material with high fatigue strength, durability, corrosion resistance, ductility and machinability, and is used in various industries. 4140 steel coil has good surface quality, smooth and beautiful appearance, high dimensional accuracy, good processing and forming performance and welding performance. 4140 steel coil composition and further information are below.
| AISI 4140 Steel Coil Supply | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Specification | Surface | |||||||||||||||||
| Coil/Sheet/Plate | Thickness: 3-10mm; Width: 1200-1500mm; Length: Can be customized(According to customer requirements) Weight:about 20 Tons | Black Surface/Milling/Debarked/Turning/Cold Drawn | |||||||||||||||||
4140 Steel Coil Grade Equivalent Chart
| Country | USA | Germany/UK/France | JAPAN |
|---|---|---|---|
| Standard | ASTM A29 / A29M-05 | EN 10083/3-2006 | JIS G4053-2008 |
| Grades | 4140 | 42CrMo4(1.7225) | SCM440 |
4140 Steel Coil Chemical Composition
| STAND | C(%) | Mn(%) | P(%) | S(%) | Si(%) | Cr(%) | Mo(%) | Ni(%) |
|---|---|---|---|---|---|---|---|---|
| ASTM A29 / A29M-05 | 0.38-0.43 | 0.75-1.00 | Max 0.035 | Max 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | - |
| EN 10083/3-2006 | 0.38-0.45 | 0.60-0.90 | Max 0.025 | Max 0.035 | Max 0.40 | 0.90-1.20 | 0.15-0.30 | - |
| JIS G4053-2008 | 0.38-0.43 | 0.60-0.90 | Max 0.030 | Max 0.030 | 0.15-0.35 | 0.90-1.20 | 0.15-0.30 | ≤0.25 |
AISI 4140 Steel Coil Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting point | 1416°C | 2580°F |
1.7225 Steel Coil Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus(typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus(typical for steel) | 80 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(in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop(converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B(converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C(converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers(converted from Brinell hardness) | 207 | 207 |
| Machinability(based on AISI 1212 as 100 machinability) | 65 | 65 |
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ASTM 4140 Steel Coil Application
AISI 4140 steel round bar is an alloy structural steel with good strength and good comprehensive mechanical properties after heat treatment. It has good manufacturability. Maximum operating temperature is 427°C. It is used to manufacture forgings that require higher strength and larger quenched and tempered sections than 35CrMo steel, and can also be used to manufacture turbine fasteners, high-strength parts, valves, bolts, joints, hydromechanical shafts, couplings, tool bodies, molds , brake shoe, winch shaft, support plate filling block, etc.
4140 Steel Coil Characteristics
1.It is low alloy steel with chromium, molybdenum, and manganese.
2.Great toughness, fatigue strength, abrasion and impact resistance.
3.It is widely be used in the industry due to its excellent versatility and usefulness.
4.The higher carbon content in it, the higher the strength and heat treatment capabilities it is.
5.It can be oil hardened to relatively high hardenability.
4140 Steel Round Bar Coil Sheet Plate Heat Treatment
Machinability
At the annealed condition, 4140 alloy tool steel has good machinability.
Forming
DIN 1.7225 steel has high ductility. It can be formed using conventional techniques in the annealed condition. It is required more pressure or force for forming because it is tougher than plain carbon steels.
Welding
4140 alloy steel can be welded using all advanced techniques. But, the mechanical properties of it will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.
Heat Treatment
1.7225 tool steel is heated at 845°C(1550°F) followed by quenching in oil. Before hardening, it can be normalized by heating at 913°C (1675°F) for a long period of time followed by air cooling.
Forging
It is forged at 926 to 1205°C(1700 to 2200°F)
Hot Working
4140 steel can be hot worked at 816 to 1038°C(1500 to 1900°F)
Cold Working
1.7225 steel can be cold worked using conventional methods in the annealed condition.
Annealing
Heat it to 800℃ – 850℃, hold until temperature is uniform throughout the section and cool in furnace.
Normalizing
Heat 1.7225 alloy steel to 870℃ – 900℃, hold it until the temperature is uniform throughout the section, soak for 10 – 15 minutes and cool in still air.
Tempering
DIN 1.7225 steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has lower tempering temperature. For example, tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
Hardening
DIN 1.7225 alloy steel can be hardened by cold working, or heating and quenching.
4140 Steel Coil Supply
We can harden and temper materials to meet your specific application requirements, have our own cutting processing equipment, have rich production experience, and specifications can be cut and customized according to your requirements.
We have specialized in the production of 4140 alloy steel for decades, providing 4140/1.7225/SCM440 alloy steel coils, round bars, square steel, flat steel, etc., as a professional 4140 steel coil supplier, if you have any AISI 4140/DIN 1.7225 steel requirements ,Please contact us. Songshun Steel is with you.
Our Advantage
Manufacturing
With 7000 tons of hydraulic forging press, electric slag furnace and other high-end production equipment, we produce a great variety of steels with the best quality in China.
Testing
In order to control the quality, we have complete testing methods to make sure satisfy the customer needs, including Chemical Analysis, Ultrasonic Test and so on.
Massive Stock
We keep a mass stock are over 20000 tons for various steel type, including steel round bar, steel sheet, alloy steel, carbon steel, stainless steel, mold steel, steel coil and etc.
Customized Service
With a professional steel engineers team, we provide customized service according to your project drawing, also provide professional project experience for your special project, such as materials, processing conditions and etc.
World Wide Delivery
For container shipment, standard packing and bundle round bar and flat bar would be applied. It is necessary to fasten & reinforcement would be done to ensure the safety and better unloading at the destination port.
For less than container shipment, wooden box package would be applied for different size materials. For milled or grounded materials, the anti-rust oil would be needed to ensure the surface condition, within the wooden box.
