Compare Chinese 42CrMo steel and Korean SCM440H

30/09/2021

On the market today appears SCM440H steel of Korean and Chinese origin. So customers often compare Chinese 42CrMo steel and Korean SCM440H.

Previously in the manufacturing process, manufacturers used carbon steel as the main material. However, in the process of using this steel line appears many disadvantages based on the carbon content in steel:

- The higher the carbon content is, the harder the steel billet is, the more it breaks.

- Low carbon content is easy to shape but does not guarantee hardness.

To overcome the above characteristics, the steel manufacturers have added chromium to the chemical composition of this carbon steel line to help the embryo improve hardness without breaking easily. On that basis, the line of alloy steel was created as a perfect product to overcome these disadvantages.

Alloy steel includes all kinds of steel: SCM440H, SCM420, SCR440, SCR420, ... and one of the most typical names in the alloy steel line is SCM440H steel. SCM440H steel is a steel line with a combination of chromium - molybdenum which is suitable for use as machine parts subjected to load, impact and abrasion.

Compare Chinese 42CrMo steel and Korean SCM440H sevit special steel

On the market today, the SCM440H steel series is sold with different origins. But the majority is still SCM440H steel made in Korea and 42CrMo China. So there are no differences between the two countries and customers are so confused. Let's compare China 42CrMo steel and Korean SCM440H.

1. Application of SCM440H steel

With the combination of chromium - molybdenum, the two main components that create durability and abrasion resistance during use, SCM440H steel is often used in mold manufacturing and mechanical processing industry such as:

- Suitable for machine parts bearing large loads, high abrasion and impact such as gears, transmission shaft of the engine, screws, bolts.

- In addition, steel is commonly used in the manufacture of motor vehicles, motor vehicles and industrial machine parts.

- Steel is also suitable for making mold steel (rice husk molds, plastic injection molds), electronic components.

- Anchor bolts for telecommunication broadcasting stations.

- Operating shafts in sugarcane crushing plants of sugar production plants.

- Rolling shafts and pinions in a system of steel rolling mills.

2. Compare Chinese 42CrMo steel and Korean SCM440H

a. Standard

- Korea: Manufactured in accordance with JIS 4052.

- China: Manufactured according to the standard GB / T 3077.

b. About steel grade

- Korean steel: SCM440H

- Chinese steel: 42CrMo

c. Chemical composition

Main composition	C	Mn	Cr	Mo
Korean	0,38 ~ 0,44	0,55 ~ 0,95	0,85 ~ 1,25	0,15 ~ 0,35
China	0,37 ~ 0,43	0,5 ~ 0,8	0,9 ~ 1,2	0,15 ~ 0,25

Depending on the application of SCM440H steel, customers want to choose the origin of goods in accordance with their requirements. However, for the purpose of long-term use, saving costs and processing time, we always recommend our customers to choose SCM440H Korean steel line because of its long-term reputation and quality.

Hopefully the above information will solve the problems that readers are having. If you want more detailed advice on the type of industrial steel, readers can contact 0332 91 61 61 or chat online with us.

Sevit is pleased to answer all questions from readers!

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