1.0503, S45C, G10450, AISI 1045

GENERAL CHARACTERISTICS

1045/C45 steel is defined as medium carbon steel which has 0.4%-0.5% Carbon. It offers good weldability, good machinability, high strength and impact properties, but low in hardenability because of lack of suitable alloying elements.

Designation by Standards

Chemical Composition (in weight %)

Description C45 is a medium carbon steel is used when greater strength and hardness is desired than in the “as rolled” condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned, ground and polished. Applications Quenched and subsequently tempered steel for screws, forgings, wheel tires, shafts, sickles, axes, knives, wood working drills, hammers, etc. Physical properties (average values) at ambient temperature Modulus of elasticity [10³ x N/mm²]: 205 Density [g/cm³]: 7.85 Specific heat capacity[J/g.K]: 0.48 Coefficient of Linear Thermal Expansion 10^-6 °C^-1

Soft Annealing Heat to 680-710°C, cool slowly in furnace. This will produce a maximum Brinell hardness of 207. Normalizing Normalizing temperature: 840-880°C/air. Hardening Harden from a temperature of 820-860°C followed by water or oil quenching. Tempering Tempering temperature: 550-660°C/air. Mechanical Properties in Quenched + Tempered Condition

Mechanical Properties in Normalized Condition

Diagram Tempering Temperature – Mechanical Properties  Forging Hot forming temperature: 1050-850°C.