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How to Purchase Suitable and High Quality 42CrMo Steel

What is 42CrMo steel? It is a widely used alloy structural steel. GB 42CrMo steel is equivalent to AISI 4140 steel and is favored by the market for its excellent mechanical properties. Songshun has many years of experience in providing high-quality 42CrMo steel and has a deep understanding of it. This article will explore the steel equivalent, chemical composition analysis, performance, application, etc. of 42CrMo steel to ensure whether it is suitable for your project, and emphasize why to purchase high-quality 42CrMo materials from Songshun.

GB 42CrMo Steel Equivalent

China GB /T 3077 standard: GB 42CrMo
USA ASTM A29/A29M standard: AISI/SAE/ASTM 4140
Japan JIS G 4053 standard: JIS SCM440
Germany EN 10083-3 standard: DIN EN/DIN 42CrMo4 / W-Nr. 1.7225
France NF A 35-557 standard: NF EN/NF 42CD4
UK BS 970-3 standard: BS EN/BS 708M40
International standard ISO 683-18 standard: ISO 42CrMo4

42CrMo Steel Chemical Composition

GB 42CrMo Steel Chemical Composition (%)

Alloy steel 42CrMo contains a moderate carbon content, which provides the steel with basic hardness and strength. It contains 0.17-0.37 silicon content, which can improve the toughness and corrosion resistance of the steel. It also contains a certain amount of chromium, which not only improves the corrosion resistance and wear resistance of the steel, but also enhances the steel’s oxidation resistance. The combination of these alloying elements in 42CrMo steel gives it good heat treatment characteristics, hardening ability, strength, etc.

Alloy Steel 42CrMo Properties

  • High strength and toughness
  • Good hardness and wear resistance
  • High hardenability and fatigue resistance
  • High temperature resistance and corrosion resistance
  • Good stability and no obvious temper brittleness
  • Easy to process and good machinability

42CrMo Material Application

This steel is widely used in machinery manufacturing, automobile manufacturing, petrochemical industry, aerospace, shipbuilding, mold manufacturing, construction, electricity, energy, military industry and other fields. And 42CrMo steel is usually used to manufacture various gears, plastic molds, shafts, bearings, couplings, large mold cavities, connecting rods, reactors, aircraft landing gear, decks, pipelines, pressure vessels, shaft parts, mechanical parts and key parts of transmission systems, etc.

Heat Treatment Of 42CrMo Steel

Annealing: The temperature is usually 760±10℃, furnace cooling to 400℃ air cooling.

Normalizing: The temperature is usually controlled at 850~900°C, air cooling after leaving the furnace.

Quenching and tempering: preheating temperature 680~700°C, quenching temperature 840~880°C, oil cooling, tempering temperature 580°C, water cooling or oil cooling, hardness ≤217HBW.

High temperature tempering: The temperature is controlled at 680~700°C, air cooling after leaving the furnace.

Quenching and tempering: quenching at 850℃, then tempering at 500 degrees, HRC40-43.

Advantages Of 42CrMo Steel Supplied By Songshun

1. Comprehensive solutions and technical support
At Songshun, we understand every steel material we provide and know how to manufacture it to meet customer needs. We can provide customers with comprehensive and professional support and solutions both before and after sales, allowing customers to purchase the 42CrMo steel that best suits their projects, improving their procurement efficiency, project progress and cost-effectiveness.

2. Strong supply capacity and quality assurance
After clarifying your needs and usage requirements, Songshun’s supply capacity and product quality can meet all your needs. We have our own warehouse, stocked all year round, with rich steel specifications and types, and also support customization. And all steel for each order will undergo a strict quality inspection process, committed to providing customers with the best quality and most cost-effective steel.

3. More services and good reputation
Songshun is an experienced and reputable steel supplier. Our materials are exported nationwide. The company’s qualifications are open and transparent. We have been supplying 42CrMo for many well-known manufacturers and wholesalers for a long time to manufacture gears, shafts, molds, etc., ensuring that the delivered products not only meet the requirements, but also exceed customer expectations. And we provide a variety of professional services, whether it is steel processing, testing or packaging services, we can supply, dedicated to meeting your needs.

In summary, 42CrMo steel not only has excellent performance, but is also widely used. If you need to purchase suitable and high-quality GB 42CrMo steel, Songshun will be your best choice. With our long-term stable supply capacity, first-class service, high-quality materials and global reputation, we will be your preferred long-term partner.


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