AISI 5140 steel also can be called JIS Scr440 and DIN 1.7035 steel. It is one of the alloy steel. And it is one of 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 heat treatment as below. 5140 Steel Application bolts After hardening and tempering, it can be used to make the fittings for machines with high medium load and speed of work. Such as the automobile knuckle, gear wheel and axis of the machine tools. If it had been quenching and tempering with medium temperature, it will be a great choice for fittings with high load, low impact and good wearing resistance. Such as the gear wheel, lantern ring and etc. And after quenching and low-temperature tempering, the properties will be better than the last one. People usually use it to make the parts with good wearing resistance and handle high load, low impact. And you can see the principal axis, mechanical bolt and etc are made of it. 1.7035 Steel Physical Properties Properties Metric Imperial Density 7.85 g/cm³ 0.284 lb/in³ Edit 1.7035 Steel Mechanical Properties 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 Edit steel warehouse 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) 40CrA (A20403) 40CrE (A20406) 5140 41Cr4 (1.7035) 41Cr4 SCr440 Edit 5140 Steel Round Bar Chemical Composition STAND Grade C(%) Mn(%) P(%) S(%) Si(%) Cr(%) Ni(%) Mo(%) Cu(%) GB/T 3077-1999 40Cr (A20402) 0.37-0.44 0.50-0.80 ≤0.035 ≤0.035 0.17-0.37 0.80-1.10 ≤0.30 ≤0.15 ≤0.30 GB/T 3077-1999 40CrA (A20403) 0.37-0.44 0.50-0.80 ≤0.025 ≤0.025 0.17-0.37 0.80-1.10 ≤0.30 ≤0.10 ≤0.25 GB/T 3077-1999 40CrE (A20406) 0.37-0.44 0.50-0.80 ≤0.025 ≤0.015 0.17-0.37 0.80-1.10 ≤0.30 ≤0.10 ≤0.25 ASTM A29/A29M-05 5140 0.38-0.43 0.70-0.90 ≤0.035 ≤0.040 0.15-0.35 0.70-0.90 - - - EN 10083/3-2006 41Cr4 (1.7035) 0.38-0.45 0.60-0.90 ≤0.025 ≤0.035 ≤0.40 0.90-1.20 - - - ISO 683/1:1987 41Cr4 0.38-0.45 0.60-0.90 ≤0.035 ≤0.035 0.10-0.40 0.90-1.20 - - - JIS G4053-2008 SCr440 0.38-0.43 0.60-0.90 ≤0.030 ≤0.030 0.15-0.35 0.90-1.20 ≤0.25 - - Edit songshun steel machine 5140 Steel Sheet Plate Round Bar Heat Treatment The ways of heat treatment for 1.7035 steel are normalizing, annealing, quenching, tempering and etc. Quenching it at the temperature of 850℃ and oil cooling. Tempering at the temperature of 520℃, then water-cooling and oil cooling. After quenching, the surface hardness of it is 52-60HRC. Nitrogen Treatment 5140 steel can nitriding, and the elements of it are good for nitriding. After nitriding, it can get higher surface hardness. And after nitriding, hardening and tempering, the max hardness can up to 72-78HRA. And the hardness of core will be 43-55HRC. Nitrogen Process Forging Annealing Rough machining Hardening and tempering Finish machining Stress relieving Rough grinding Nitriding Lapping Steel Packing We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements. We are a professional special steel stockist and supplier with a high-quality stand for many years. As a professional 5140 steel supplier, please contacts us for any request. Songshun Steel always with you.
