Sae 1045 carbon steel plate, aisi 1045 steel plate Chemical composition of 1045 steel plate Grade C% mn% si% p s 0.42~0.48 0.6~0.9 0.15~0.35 â?¤0.030 â?¤0.030 Equivalent grade of 1045 steel plate: Gb aisi din jis 45# 1045 1.1191 s45c Available sizes of 1045 steel plate: Round: dia. 60â?? 300mm Plate: thickness 16 â?? 300mm, width 60- 520mm Delivery condition: hot rolled or forged peeled or black surface, annealed or no heat treatment. Properties of 1045 steel plate: A medium carbon steel is used when greater strength and hardness is desired than in the â??as rolledâ?� condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned ground and polished. Applications of 1045 steel plate: Component parts for vehicles, shafts, bushings, crankshafts, connecting rods and parts for the machine building industry and steel for axes, knives, hammers etc. Heat treatment of 1045 steel plate: Soft annealing: heat to 650-700â°c, cool slowly. Hardness after annealing: max. 207 hb Hardening: 820 - 850 â°c Normalizing temperature: 840-870â°c