AISI 5140 Steel Round Bar Plate Sheet, DIN 1.7035, JIS SCr440
Alloy steels comprise a wide range of steels whose compositions are more than the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B which have been fixed for carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.
The following datasheet will provide details about AISI 5140 alloy steel.
AISI 5140 steel also can be called JIS Scr440 and DIN 1.7035 steel. It is one of the alloy steel as well as the most popular steel grades in the productions of the machine. The 5140 steel round bar price is on the medium level and it was easy to processing. After tempering and quenching, the toughness, plasticity and wearing resistance of it will get better. Steel normalizing can make the spheroidizing for the organization of steel get easier. And it will raise the machinability of the semi-finished product with the hardness less than 160HBS. Tempering it at the temperature of 550℃-570℃ which can make it get better mechanical property. And the hardenability of it is higher than S45C steel. You can check 5140 Steel chemical composition and mechanical properties as below.
5140 Steel Grade Equivalent Chart
| Country | China | USA | Germany/UK/France | ISO | Japan |
|---|---|---|---|---|---|
| Standard | GB/T 3077-1999 | ASTM A29/A29M-05 | EN 10083/3-2006 | ISO 683/1:1987 | JIS G4053-2008 |
| Grades | 40Cr (A20402) \n40CrA (A20403) \n40CrE (A20406) | 5140 | 41Cr4 (1.7035) | 41Cr4 | SCr440 |
Chemical Composition
The following table shows the chemical composition of AISI 5140 alloy steel.
| Element | Content (%) |
|---|---|
| Iron, Fe | 97.395-98.07 |
| Manganese, Mn | 0.700-0.900 |
| Chromium, Cr | 0.700-0.900 |
| Carbon, C | 0.380-0.430 |
| Silicon, Si | 0.150-0.300 |
| Sulfur, S | ≤ 0.0400 |
| Phosphorous, P | ≤ 0.0350 |
Physical Properties
The physical properties of AISI 5140 alloy steel are outlined in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
Mechanical Properties
The mechanical properties of annealed AISI 5140 alloy steel are highlighted in the table below.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 570 MPa | 82700 psi |
| Yield strength | 295 MPa | 42800 psi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Izod Impact | 41.0 J | 30.2 ft.lb |
| Hardness, Brinell | 167 | 167 |
| Hardness, Knoop (converted from Brinell hardness) | 188 | 188 |
| Hardness, Rockwell B (converted from Brinell hardness) | 85 | 85 |
| Hardness, Vickers (converted from Brinell hardness) | 175 | 175 |
| Machinability (annealed and cold drawn, based on 100 machinability for AISI 1212 steel) | 65 | 65 |
Thermal Properties
The thermal properties of AISI 5140 alloy steel are provided in the table below.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal conductivity | 44.6 W/mK | 310 BTU in/hr.ft².°F |
| Thermal expansion co-efficient (@20-200°C/68-392°F) | 12.6 µm/m°C | 7 µin/in°F |
Other Designations
Equivalent materials to AISI 5140 alloy steel are as follows.
| AFNOR 42 C 2 | AFNOR 42 C 4 | DIN 1.7035 | UNI 40 Cr 4 | UNI 41 Cr 4 KB | JIS SCr 4 H |
| B.S. 2 S 117 | B.S. 530 A 40 | B.S. 530 H 40 | B.S. 530 M 40 | ASTM A322 | ASTM A331 |
| ASTM A505 | ASTM A519 | SAE J404 | SAE J412 | SAE J770 |
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