AISI 1045 steel is high-quality medium-carbon steel with high strength. It also can be called JIS S45C and DIN C45 steel. It is usually used in normalized condition because of its bad hardenability. It needs to be quenching and tempering treatment to get higher mechanical performance. It is used to manufacture machine parts with high strength requirements. Such as gears, shafts, piston pins, and etc. 1045 Steel round bar sheet plate properties and heat treat as below. C45 Steel Characteristics It is carbon steel and has great weldability and machinability. After normalized and hot rolled, it will get high strength and impact properties. It has low hardenability and critical hardenability diameter is 12-17mm in the water. And there has a tendency to crack when water quenching. The hydrogen welding and argon arc welding is good for it, but the gas welding is not. It is required to preheat before the welding, and stress relief annealing should be performed after welding. C45 Steel Application 1045 steel for bolts1045 steel for axles 1045 steel is widely used for the industry application that required higher strength and wear resistance than low-carbon steel. And the typical applications are gears, shafts, rolls, crankshafts, sockets, bolts and etc. 1045 Steel Physical Properties Physical Properties Metric Imperial Density 7.87 g/cc 0.284 lb/in³ Edit C45 Steel Mechanical Properties Mechanical Properties Metric Imperial Hardness, Brinell 163 163 Hardness, Knoop (Converted from Brinell hardness) 184 184 Hardness, Rockwell B (Converted from Brinell hardness) 84 84 Hardness, Vickers (Converted from Brinell hardness) 170 170 Tensile Strength, Ultimate 565 MPa 81900 psi Tensile Strength, Yield 310 MPa 45000 psi Elongation at Break (in 50 mm) 16.0 % 16.0 % Reduction of Area 40.0 % 40.0 % Modulus of Elasticity (Typical for steel) 200 GPa 29000 ksi Bulk Modulus (Typical for steel) 140 GPa 20300 ksi Poissons Ratio (Typical For Steel) 0.290 0.290 Shear Modulus (Typical for steel) 80 GPa 11600 ksi Edit aisi 1045 1045 Steel Grade Equivalent Chart Country USA Germany/UK/France JAPAN ISO Standard ASTM A29/A29M-05 EN 10083/2-2006 JIS G4051-2009 ISO 683/18-1996 Grades 1045 C45(1.0503) S45C C45E4 Edit 1045 Steel Chemical Composition STAND C(%) Mn(%) P(%) S(%) Si(%) Cr(%) Mo(%) Ni(%) ASTM A29/A29M-05 0.43-0.50 0.60-0.90 Max 0.040 Max 0.050 Max 0.10 - - - EN 10083/2-2006 0.42-0.50 0.50-0.80 Max 0.045 Max 0.045 Max 0.40 Max 0.40 Max 0.10 Max 0.40 JIS G4051-2009 0.42-0.48 0.60-0.90 Max 0.030 Max 0.035 0.15-0.35 - - ≤0.20 ISO 683/18-1996 0.42-0.50 0.50-0.80 ≤0.035 ≤0.035 0.10-0.40 - - - Edit 1045 Steel Round Bar Sheet Plate Heat Treatment Forging Heat to 850°C – 1250°C (1562°F – 2282°F) Hold until the temperature is uniform Cool in furnace china steel warehouse Annealing Heat to 800°C – 850°C (1472°F – 1562°F) Hold until the temperature is uniform Cool in furnace. C45 Steel Normalizing Heat to 870°C – 920°C (1598°F-1688°F) Hold until the temperature is uniform Soak for 10 – 15 minutes Cool in still air Stress Relieving Heat to 550°C – 660°C (1022°F – 1220°F) Hold until the temperature is uniform Soak for 1 hour per 25mm of section Cool in still air Hardening Heat to 820°C – 850°C (1508°F – 1562°F) Hold until the temperature is uniform Soak for 10 – 15 minutes per 25mm of section Quench in water or brine Tempering Re-heat to 400°C – 650°C (752°F – 1202°F ) as required Hold until the temperature is uniform Soak for 1 hour per 25mm of section Cool in still air C45 Steel Process Notes The hardness is between HRC20~HRC30 after quenching and tempering. After quenching, the hardness is between HRC55~58 and the limit value up to HRC62. In order to make the steel performance stable, it should be processed and placed for 15-20 days before the use. The highest hardness for practical application is HRC55 (high-frequency quenching HRC58). It is a high-quality carbon structural steel with low hardness. It is easy to cut, and it is used to make molds, guideposts, tips, templates and etc. Do not use the heat treatment process of carburized and quenched. C45 Steel Quality Certificate 1045 steel properties 1045 Steel Round Bar Sheet Plate Supply Range Round Bar Specification: diameter: Max 800mm; length: Max 9m Surface: Black/Peeled/Machined(turned)/Polished(grounded) Sheet/Plate/Slab Specification: thickness: Max 800mm; width: Max 2300mm; length: Max 9m Surface: Black/Peeled/Machined/Polished(grounded,grinded,milled) Notice 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 1045 steel supplier, please contacts us for any request for it. Songshun Steel always with you.
