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40Cr hot rolled steel round bars
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40Cr hot rolled steel round bars
40Cr hot rolled steel round bars information
40Cr alloy structural steel has higher tensile strength, yield strength and hardenability than No. 40 steel, but its weldability is limited and there is a tendency to form cracks. 40Cr is a medium carbon modulated steel, cold heading die steel. The steel is moderately priced and easy to process. After proper heat treatment, certain toughness, plasticity and wear resistance can be obtained. Normalizing can promote the spheroidization of the structure and improve the cutting performance of the blank with a hardness less than 160HBS. Tempering at a temperature of 550~570℃, the steel has the best comprehensive mechanical properties. The hardenability of this steel is higher than that of 45 steel, and it is suitable for surface hardening treatment such as high frequency quenching and flame quenching. After quenching and tempering, 40Cr steel is used to manufacture mechanical parts under medium load and medium speed, such as car steering knuckles, rear half shafts and gears, shafts, worms, spline shafts, top sleeves on machine tools, etc.; after quenching and After tempering at medium temperature, it is used to manufacture parts that bear high load, impact and medium speed work, such as gears, spindles, oil pump rotors, sliders, collars, etc.; after quenching and low temperature tempering, it is used to manufacture parts that bear heavy loads and low impact And parts with wear resistance and the solid thickness on the cross section below 25mm, such as worms, spindles, shafts, collars, etc.; after quenching and tempering and high-frequency surface quenching, they are used to produce high surface hardness and wear resistance. Parts with great impact, such as gears, sleeves, shafts, main shafts, crankshafts, spindles, pins, connecting rods, screws, nuts, intake valves, etc. In addition, this steel is suitable for manufacturing various transmission parts for carbonitriding, such as gears and shafts with larger diameters and good low temperature toughness.
40Cr hot rolled steel round bars Chemical and Mechanical
Product parameters
Chemical composition
| C(％) | 0.37～0.44 | Si(％) | 0.17～0.37 | Mn(％) | 0.50～0.80 | P(％) | ≤0.030 |
| S(％) | ≤0.030 | Cr(％) | 0.80～1.10 |
Mechanical Properties
The mechanical properties of annealed GB 40CR alloy steel are outlined in the table below
| Tensile | Yield | Bulk modulus | Shear modulus | Poisson’s ratio | Izod Impact |
| KSI | KSI | KSI | KSI | ft.lb | |
| 76900 | 55800 | 20300 | 11600 | 0.27-0.30 | 84.8 |
Heat treatment Related
- Annealing of 40CR Alloy structural steel
Slowly heated to 850 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 40CR alloy steel will get MAX 250 HB （Brinell hardness）.
- Hardening of 40CR Alloy structural steel
Heated slowly to 880-920°C, Then after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature.
Equivalent Of 40Cr alloy Structure Steel
| USA | Germany | China | Japan | France | England | Italy | Poland | ISO | Austria | Sweden | Spain |
| ASTM/AISI/UNS/SAE | DIN,WNr | GB | JIS | AFNOR | BS | UNI | PN | ISO | ONORM | SS | UNE |
| 5140 / G51400 | 41Cr4 / 1.7035 | 40Cr | SCr440 | 42C4 | 530A40 / 530M40 | 41Cr4 | 2245 |
Applications
GB 40CR steel is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Typical applications such as valve bodies, pumps and fittings, Shaft, the high load of wheel, bolts, double-headed bolts, gears, etc
Regular size and Tolerance
Steel round bar: Diameter Ø 5mm – 3000mm
Steel plate: Thickness 5mm – 3000mm x Width 100mm – 3500mm
Steel Hexagonal bar: Hex 5mm – 105mm
Others 40CR have not specified size, pls contact our experienced sales team.
Factory video
Shandong Mingding Supply Chain Management Service Co., Ltd. was established in 2013, focusing on the production, processing and trade of metal materials. We have a professional team to provide quality service, we sincerely welcome customers at home and abroad to visit our company for guidance and long-term cooperation.
Warehouse storage
The company has the most advanced production equipment and automatic control system, to ensure the most reliable product quality. In addition, we also have a professional international trade and logistics team. With quality products and excellent service, we have established a large number of long-term customers all over the world.
Packing and delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Production Technology
Our main products include high quality carbon steel, stainless steel products,galvanized steel products, aluminum and copper. We can also provide cutting, punching, bending, polishing, shearing, wire drawing and other related service.
Honor
Application
Our company is set production processing and trade as one. The company has the most advanced production equipment and automatic control system, to ensure reliable product quality and sufficient supply capacity. Our main products are stainless steel, silicon steel, galvanized steel, carbon steel, aluminum products and other series. Applicable to engineering, coal mining, shipping, aviation, boiler, machinery, military and other fields. We sincerely welcome customers from all over the world to visit our company to discuss long-term cooperation.
Architectural field
Architectural field
Automotive field
Automotive field
Aviation field
Aviation field
Chemical industry field
Chemical industry field
FAQ
How do you package the product?
The inner layer is covered with waterproof paper, packed in iron and secured by fumigated wooden brackets. It can effectively protect products from corrosion in the process of sea sample transportation.
Are the products inspected before shipment?
Of course. All our products go through strict quality tests before they are packed. Those that fail will be destroyed.
Can I visit your factory?
Of course. We welcome customers from all over the world to visit our factory.
What certifications have your products passed?
We have ISO 9001, SGS, EWC and other certifications.
Can you provide samples?
Of course, we can send samples all over the world. Our samples are free of charge, but the customer needs to bear the Courier charge
What is the loading port?
Normally, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. You can choose other ports according to your needs.
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Add：Shan Gang Building, 61-11 South Gongye Road, Jinan Area, China (Shandong) Pilot Free Trade Zone
MD Steel
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info@mingdingsteel.com
+8615553113555