ThePipingMart Blog Grades EN C42D Steel – Composition, Properties, and Uses

EN C42D Steel – Composition, Properties, and Uses

C42D Steel

Steel is a vital component in many construction and manufacturing applications. However, not all types of steel are created equal. One particular type that has gained popularity over the years is C42D Steel. It is a type of stainless steel with unique characteristics, making it a go-to choice for many industries. This article will explore the composition, physical and mechanical properties, uses hardness, and heat treatment process of C42D Steel.

C42D Steel Composition

C42D Steel is classified as a low-carbon steel alloy, meaning it contains less carbon than many other types of steel. It comprises 98.5 per cent iron, 0.3 per cent carbon, 0.5 per cent manganese, 0.5 per cent silicon, 0.03 per cent sulfur, and 0.03 per cent phosphorus. This composition makes C42D Steel an excellent lightweight, corrosion-resistant, and highly durable material.

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
040-0.45 0.10-0.30 0.50-0.80 0.035 0.035 0.20 0.25 0.05

C42D Steel Physical Properties

C42D Steel has remarkable physical properties that make it suitable for different applications. These include its melting point of 1425° C, 24W/(m*K) thermal conductivity, and electrical resistivity of 7.5 10^-7 Ωm. Additionally, it has a density of 7.85 g/cm3 and maintains its appearance even at extremely low temperatures.

Property Density
Temperature T
Specific heat
Thermal conductivity
Electric resistance
Modulus of elasticity
Expansion rate
465(≥) 331(≥) 44 12 11 Solution and Aging,Annealing,Ausaging,Q+T,etc 242
Creep strain limit
Creep rupture strength
339 462 749

C42D Steel Mechanical Properties

C42D Steel has excellent mechanical properties that make it stand out from other types of steel. It has a high tensile strength of 700 MPa, yield strength of 335 MPa, and an elongation at a break of 16%. These factors and its outstanding flexibility and toughness make C42D Steel the perfect material for making different components such as screws, bolts, nuts, and shafts.

Rp0.2 (MPa) Rm (MPa) Impact
KV (J)
A (%)
A Z (%) Delivery Hardness HB
868 (≥) 941 (≥) 13 22 32 Solution & Aging, Ann, Ausaging, Q+T 234

C42D Steel Uses

Due to its unique combination of excellent physical and mechanical properties, C42D Steel has become popular in many industries. It is commonly used in manufacturing surgical instruments, kitchen utensils, and cutlery. Additionally, it is a suitable material for making pump components, valves, and heat exchangers. It is also a vital component in the automobile industry, used to make critical components such as gears, shafts, and engine parts.

C42D Steel Hardness

C42D Steel is known to be a hard steel alloy. It has a Rockwell hardness of 95 HRB, meaning it is not as tough as other types of steel. However, it can be hardened further using heat treatment techniques.

C42D Steel Heat Treatment

Heat treatment is a process that involves heating and cooling metal to obtain the desired physical and mechanical properties. For C42D Steel, heat treatment is an essential process that helps to increase its hardness and strength. The most common heat treatment technique for C42D Steel is quenching and tempering. Quenching involves rapidly heating the steel to a high temperature and then cooling it rapidly, while tempering involves heating the steel to a much lower temperature. The resultant steel has a higher hardness, strength, and flexibility.


C42D Steel is a unique type of steel alloy that has continued to gain popularity over the years. Its excellent physical and mechanical properties make it a go-to material in various industries. Understanding the composition, physical and mechanical properties, uses, hardness and heat treatment process of C42D Steel is vital in making informed decisions when choosing the right type of steel for your project.

Related Post