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Good quality scm440/4140 1.7225 alloy Steel Plate Steel Round Bar
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Dongguan City Yaoteng Special Steel Co., Ltd.
Business Type: Manufacturer,Trading Company
Dongguan Guangdong ChinaMain Products: H13 tool Steel round bar ,tool steel plate ,High speed steel ,mold steel ,Automotive steelProduct Details
Alloy Steel SCM440/AISI4140/ 1.7225 Steel Round Bar
1.4140 42CrMo4 SCM440 1.7225
2.Alloy steel round bar
3.Competive price&good quality
4.Within 10 days delivery time
Alloy steels are designated by AISI four-digit numbers. They comprise different kinds of steels having composition exceeding the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va set for carbon steels.
AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.
The following table shows the chemical composition of AISI 4140 alloy steel.
| Element | Content (%) |
|---|---|
| Iron, Fe | 96.785 - 97.77 |
| 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 |
The physical properties of AISI 4140 alloy steel are highlighted in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
| Melting point | 1416°C | 2580°F |
The following table outlines the mechanical properties of AISI 4140 alloy steel.
| 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 |
The thermal properties of AISI 4140 alloy steel are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 12.2 µm/m°C | 6.78 µin/in°F |
| Thermal conductivity (@ 100°C) | 42.6 W/mK | 296 BTU in/hr.ft².°F |
Other designations equivalent to AISI 4140 alloy steel are listed in the following table.
| AMS 6349 | ASTM A193 (B7, B7M) | ASTM A506 (4140) | ASTM A752 (4140) |
| AMS 6381 | ASTM A194 (7, 7M) | ASTM A513 | ASTM A829 |
| AMS 6382 | ASTM A29 (4140) | ASTM A513 (4140) | SAE J1397 (4140) |
| AMS 6390 | ASTM A320 (L7, L7M, L7D) | ASTM A519 (4140) | SAE J404 (4140) |
| AMS 6395 | ASTM A322 (4140) | ASTM A646 (4140) | SAE J412 (4140) |
| AMS 6529 | ASTM A331 (4140) | ASTM A711 | |
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.
AISI 4140 alloy steel can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.
AISI 4140 alloy 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.
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 lower tempering temperature. For example, tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and a tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
SCM440 steel product details and application
steel producting process and quality control
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1.Payment: T/T, L/C, Western Union, MoneyGram,; 30% deposits; 70% balance before delivery.
2.MOQ: 1pcs
3.Warranty : 3 years
4.Package Informations: 1) EXPORT, In 20 feet (GW 25 ton) or 40 feet Container (GW 25 ton)
2)as customer's requirement
| 1.Main Product | mould steel,aviation steel,steel weapons steel,tool steel,auotomotive steel |
| 2.Main Markets | Africa,South Asia,Southeast Asia,Eastern Asia,Eastern Europe. |
| 3.Year Established | 2007 |
| 4.Location | Guangdong China(mainland) |
| 5.Number of Employees | 51-100 people |
| 6.Commitment to Our Customers | We pledge to keep abreast of all deve lopments in our field and to give our customers the ultimate in maintenance steels.The quality of every grade of steel we furnish will in all cases be uniform without exception,as our steel is made using the highest quality control in the steel industry.We use ISO standards to ensure an excellent, consistent result. As a result, our steel is more durable which provides a long lasting product passing the cost savings on to our customers. Our sales team services several states across the continental United States with shipping available in both the U.S. and Canada |
2. Product series
| High speed steel | |
| AISI | M2,M4,M35,M42,T1 |
| DIN | 1.3343,1.3243,1.3247,1.3355 |
| JIS | SKH51,SKH54,SKH35,SKH59,SKH2 |
| Cold work tool steel | |
| AISI | D2,D5,D3,D6,A8,A2,O1 |
| DIN | 1.2379,1.2601,1.2080,1.2436,1.2631,1.2363,1.2510,1.2327 |
| JIS | SKD10,SKD11,SKD1,SKS3 |
| Hot work tool steel | |
| AISI | H13,H11,H21 |
| DIN | 1.2344,1.2343,1.2367,1.2581,1.2713 |
| JIS | SKD61,SKD6,SKD7,SKD5SKT4 |
| Plastic mould steel | |
| AISI | P20,P20+Ni,420 |
| DIN | 1.2311,1.2738,1.2083,1.2316 |
| JIS | PDS-3,SUS420J1,SUS420J2 |
| Alloy structural seel | |
| AISI | 5140,4340,4135,4140 |
| DIN | 1.7035,1.6511,1.7220,1.7225 |
| JIS | SCr440,SNCM439,SCM435,SCM440 |
| Stainless steel | |
| AISI | 440C,420,430 |
| DIN | 1.4125 |
| JIS | SUS440C |
| Carbon steel | |
| AISI | 1045,1020 |
| DIN | 1.1191 |
| JIS | S45C, G3101 |
3.Products & warehouse steel stock and workshop
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