JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Jiangsu Mittel Steel Industrial Limited Supply all kinds of Stainless Steel Sheet/Plate/Coil/Round ,Flat ,Angle Bar/Stainless steel Seamless pipe /welded pipe /Elbow/Flange /Galvanized Steel sheet
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AISI 4140 steel is a low alloy steel containing chromium, molybdenum, and manganese. It is widely used across numerous industries and is an excellent material choice due to its toughness, high fatigue strength, and abrasion and impact resistance. Not many grades can match the versatility and usefulness of 4140.
This alloy finds many applications as forgings for the aerospace and oil and gas industries, along with myriad uses in the automotive, agricultural and defense industries, Typical uses are forged gears and shafts, spindles, fixtures, jigs and collars.
| Grade | C | Cr | Mn | Si | Mo | S | P |
| 4140 | 0.38-.43% | 0.80-1.10% | 0.75-1.0% | 0.15-0.30% | 0.15-0.25% | 0-0.040% | 0-0.035% |
| 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 |
AISI 4140 alloy steel is heated at 845°C (1550°F) followed by quenching in oil. Before hardening, it can be normalized by heating it at 913°C (1675°F) for a long period of time, followed by air cooling.
AISI 4140 alloy steel is forged at 926 to 1205°C (1700 to 2200°F)
AISI 4140 alloy steel can be hot worked at 816 to 1038°C (1500 to 1900°F)
AISI 4140 alloy steel can be cold worked using conventional methods in the annealed condition.
AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
AISI 4140 alloy 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 a lower tempering temperature. For example, a tensile strength of 225 ksi can 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).
AISI 4140 alloy steel can be hardened by cold working, or heating and quenching.
AISI 4140 alloy steel has good machinability in the annealed condition.
AISI 4140 alloy steel has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels.
1. who are we?
We are based in WUXI , China, start from 2012 ,sell to Domestic Market(70.00%),South America(6.00%),Southeast Asia(5.00%),Africa(5.00%),Mid East(5.00%),North America(00.00%),Eastern Europe(00.00%),Oceania(00.00%),Eastern Asia(00.00%),Western Europe(00.00%),Central America(00.00%),Northern Europe(00.00%),Southern Europe(00.00%),South Asia(00.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Steel Material
4. why should you buy from us not from other suppliers?
We specialized in wear resistant Steel Plate,weather resistant steel plate,alloy steel plate,high strength steel plate,wear resistant composite plate, tank plate, high pressure vessel plate, ship steel plate.
5. what services can we provide?
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