42CrMo4 steel gear forgings have higher fatigue strength limit and resistance to multiple impacts.

42CrMo4 steel gear compared with 40Cr forged gears

Compared with 40Cr forged gears, 42CrMo4 forged gears are better than the former, especially the hardenability is higher than 40Cr steel gears. After quenching and tempering, 42CrMo4 steel gear forgings have higher fatigue strength limit and resistance to multiple impacts, and the low temperature impact toughness is good.

Chemical composition

The main chemical composition (mass fraction) of forged gear 42CrMo4 steel is: 0.38% ~ 0.45% c, 0.17% ~ 0.37% Si, 0.50% ~ 0.80% Mn, 0.90% ~ 1.20j% Cr, 0.15% ~ 0.25% Mo, ≤ 0.30% Ni, ≤0.030% P, ≤0.030% S.

The phase transition points are: Ac1730 ℃, Ac3800 ℃, Ms310 ℃.

Forging 42CrMo4 steel gears, the initial forging temperature is 1130 ~ 1180 ℃, and the final forging temperature is 850 ℃. After forging, the diameter size is more than 50mm and it needs to be cooled slowly.

The carbon content of 42CrMo4 steel gear is kept at about 0.42%, which ensures that the steel has a good combination of strength and toughness. The addition of Cr and Mo elements is mainly to improve the hardenability of steel. When quenching and heating, Cr and Mo elements are completely dissolved in austenite to improve the hardenability of steel. After quenching, Cr and Mo elements solid solution strengthen the matrix structure and improve the tempering stability of the matrix structure. During high temperature tempering, some Cr and Mo elements diffuse from the matrix structure to the precipitated cementite Fe3C to form alloy cementite (Cr, Mo, Fe) 3C. In addition, the addition of Mo element can eliminate the temper brittleness. Adding a small amount of Ni element can improve the toughness of steel.

There are many factors to consider when choosing. In general, the working conditions of gear forgings are different, and the damage form of gear teeth is different. It is the basis for determining the calculation criterion of gear strength, selecting materials and heat treatment.

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Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com

OTAI increased its inventory of German standard 42crmo4 plate since 2018, and now the daily inventory is 600 tons around.

OTAI increased its inventory of German standard 42crmo4 plate since 2018

Now OTAI 42crmo4 plate daily inventory is 1600 tons around.OTAI own the most complete size in south China.the German standard 42crmo4 plate inventory is abundant. conventional thickness of 12-250mm, each thickness range are most in stock, the quality  had been qualified by Bohle and other European steel enterprise.

German standard 42crmo4 plate both in the Chinese market and international market ssituation.

No matter price and quality, that are the most concern point of the buyer, because the steel market chaos, in China.many people so-called they have 42crmo4 plate stock,in fact is not so much as seen on the network, more just downloaded the picture from the Internet.

Mask machine material

In the Spring Festival of 2020, the outbreak of the new coronavirus was in urgent need of a large number of masks, and many enterprises were in urgent need of mask machines to put into production.

But there were not much 42crmo4 plate stocks in the Chinese steel industry at that time, but Otai was one of the few stockist which keep 42CrMo4 plate. In less than 7 days, Our 42crmo4 plate which a thickness of 40-60 mm was sold out.

Our company guarantees:the inventory is sufficient to supply the huge demand of factories in South China. especially the factory of 2020 mask machines.In addition to mask machine companies.

In the local area ,more and more companies have learned from this time,OTAI is the 42crmo4 plate with the largest size in South China, and it is quickly shipped, and provides one-stop cutting, milling and other processing services.,and be affirmed by more and more customers.

Experience of Mr. Chen

Mr. Chen from ShaoGuan City was very cautious when buying steel, and asked for the material MTC, so he was worried about getting fakes.

I told Mr. Chen: MTC, our family sure can provide it. but I believe once you search it online, every one can offer it.but to determine whether this company has real stock, genuine goods, it is best to come to our factory to check.

I can give you a spectrometer to see the ingredients. If you think that’s so far,and quite hard for you to come, we will use WeChat video calling. We have stocks of 42crmo4 plate in hundreds tons, and we supply raw materials to the local mask machine.

The quality is definitely high quality,as it’s for mask machine, and we will not ruin our reputation because of an order. Later, Mr. Chen really drove hundreds kilometers to our factory to see the goods.

I saw that our warehouse really had such much goods in stock, and also saw our testing equipment: direct reading spectrometer, hardness tester, ultrasonic Testers, etc., also saw that many people came and did purchased, he signed a contract immediately, saying that they finally found a reliable supplier, whether it is 42CrMo4 or alloy steel or mold steel will purchase with us.

Ms Sharon Wan

Mobile/WhatsApp: 0086-13580960968

Tel: 0086-769-23190193

Fax: 0086-769-88705839

Email: Sharon@otaisteel.com