precision forging S45C carbon steel forgings

precision forging S45C carbon steel forgings

S45C steel is a fully static steel made by electric furnace, open hearth or pure oxygen converter steelmaking method. The metallographic structure of the steel is uniform and has no structural defects.

Chinese name S45C steel

Features Uniform structure, no structural defects

Advantages Carbon content is above 0.4%, excellent wear resistance

Chemical composition C, Si, Mn, P, S, Cu, etc.

Disadvantages Poor hardenability

my country's steel grade The standard steel grade of GB/JB in my country is 45

Heat treatment quenching, tempering, etc.

Introduction

The carbon content of this steel is above 0.4%, and it has excellent wear resistance, but the ductility is reduced, and it is easy to deform and crack during quenching, so heat treatment is extremely important, and it must be cooled rapidly after tempering to avoid temper brittleness. The cutting performance of this type of carbon steel can be improved by spheroidizing the steel.

Chemical composition

C 0.42~0.48

Si 0.15~0.35

Mn 0.60~0.90

P≤0.030

S≤0.035

Cu≤0.30

Ni≤0.20

Cr≤0.20

Characteristics

It is a kind of medium carbon high quality steel with high strength. Due to poor hardenability, it is generally used in normalized state. When the mechanical properties are required to be high, quenching and tempering treatment is adopted. The cold deformation plasticity is moderate, and the machinability of annealing and normalizing is better than that of quenching and tempering. It is used to manufacture parts with high strength requirements, such as gears, shafts, piston pins, etc., and mechanical processing parts, forgings, stampings, bolts, nuts, and pipe joints that are not subjected to large forces.

Steel grade

my country's GB/JB standard steel grade is 45, Germany's DIN standard material number is 1.0503,

France's AFNOR standard steel grade CC45, France's NF standard steel grade C45, Italy's UNI standard steel grade C45, Belgium's NBN standard steel grade C45-1, Sweden's SS standard steel grade 1650, Spain's UNE standard steel grade F.114, America's AISI/SAE standard steel grade 1045, International Organization for Standardization ISO standard steel grade C45E4, Japan's JIS standard steel grade S45C/S48C, and Britain's BS standard steel grade IC45/080A47.

Heat treatment

Quenching and tempering specifications Quenching temperature 820℃~870℃, water cooling, tempering temperature 550~650℃, rapid cooling after leaving the furnace.

Mechanical properties

Tensile strength σb (MPa): ≥600 (61)

Yield strength σs (MPa): ≥355 (36)

Elongation δ5 (%): ≥16

Shrinkage of area ψ (%): ≥40

Impact energy Akv (J): ≥39

Impact toughness value αkv (J/cm2): ≥49 (5)

Hardness: Unheat treated, ≤229HB; Annealed steel, ≤197HB

Application

45C is widely used in machinery manufacturing. This steel has good mechanical properties. However, this is a medium carbon steel with poor quenching performance. 45# steel can be hardened to HRC42~46. Therefore, if surface hardness is required and the superior mechanical properties of 45# steel are expected to be brought into play, the surface of 45# steel is often carburized and quenched to obtain the required surface hardness.

Supply status hardness 137~170HBS, 167~229HBS, 201~269HBS

Company introduction:

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. was established in 1997. It is a professional manufacturer of forgings engaged in the manufacture and processing of automotive parts, marine gearbox accessories, and engineering machinery accessories. It can forge copper alloys, titanium alloys, aluminum alloys, carbon steel, stainless steel, high-temperature alloys and other materials. The company covers an area of ​​more than 10,000 square meters and a standard factory building of 5,000 square meters. It has a complete set of advanced production technology and equipment from mold design, development, parts manufacturing and processing. It has multiple die forging production lines mainly based on 4000T, 2500T, 1600T, 1000T, and multiple auxiliary production lines. The annual output is 15,000 tons. Exports to more than 20 countries and regions such as Germany, the United States, the United Kingdom, France, Russia, etc.