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Guangzhou Changfeng Steel Co., LTD
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Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry

China Guangzhou Changfeng Steel Co., LTD certification
China Guangzhou Changfeng Steel Co., LTD certification
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Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry

Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry
Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry

Large Image :  Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry

Product Details:
Place of Origin: China
Brand Name: DY
Certification: ISO
Model Number: GB 40Cr/DIN1.7035/SCr440/SAE5140
Payment & Shipping Terms:
Minimum Order Quantity: 3tons
Price: USD670-770/T FOB
Packaging Details: standard/customized for FCL, wooden pallets for LCL
Delivery Time: 7days
Payment Terms: L/C, T/T
Supply Ability: 500tons/month
Detailed Product Description
Material: Alloy Machinery Steel Applications: Machinery Parts/gears Etc.
Process Tech.: Hot Rolled Delivery Condition: QT
Quality Inspection: 100% UT Passed Condition: Stock
High Light:

engineering special steels


h13 tool steel

Alloy Engineering Steel Bar GB40RH Quenching and Tempering Delivery Condition


Product Introduction

AISI 5140 steel also can be called JIS Scr440 and DIN 1.7035 steel. It is one of the alloy steel. And it is one of the most popular steel grades in the productions of the machine. The 5140 steel price is on the medium level and it was easy to processing. After tempering and quenching, the toughness, plasticity and wearing resistance of it will get better. Steel normalizing can make the spheroidizing for the organization of steel get easier. And it will raise the machinability of the semi-finished product with the hardness less than 160HBS. Tempering it at the temperature of 550℃-570℃ which can make it get better mechanical property. And the hardenability of it is higher than S45C steel. You can check 5140 Steel chemical composition and heat treatment as below.

Standard steel GB in China is 40Cr, the German DIN standard material No. 1.17035/1.7045, German standard DIN grade 41Cr4/42Gr4, EN grade 18 British standard, the British standard BS steel 41Cr4, France AFNOR 42C4 France NF steel standard, standard grade of steel 38Cr4/41Cr4, Italy UNI 41Cr4 Belgium NBN steel standard, standard grade of steel 42Cr4, Sweden SS standard grade 2245. The American AISI/SAE/ASTM standard grade 5140, the Japanese JIS standard grade SCr440 (H) /SCr440, the international organization for standardization ISO standard steel 41Cr4.


Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry 0


1. Belong to the ultra-high strength steel

2. High strength and toughness

3. Good hardenability

Similar Standards

Chinese American German Japanese British
42CrMo SAE4140 1.7225 SCM440 EN19

Chemical Composition

Grades C Si Mn P S Cr Mo Cu Ni
4140 0.38-0.45 0.17-0.37 0.5-0.8 ≤0.035 ≤0.035 0.9-1.2 0.15-0.25 ≤0.3 ≤0.035
42CrMo 0.38-0.45 0.17-0.35 0.5-0.8 ≤0.035 ≤0.035 0.9-1.2 0.15-0.25 ≤0.03 ≤0.03
440 0.38-0.43 0.15-0.35 0.6-0.85 ≤0.03 ≤0.03 0.9-1.2 0.15-0.3 ≤0.3 ≤0.25


Heat Treatment

Quenching Tempering
Heating Temperature/℃ Cooling Hardness/HRC Heating Temperature/℃ Cooling Hardness/HRC
820-840 Oil ≥53 450-650 Air 25-40


General Applications

After hardening and tempering, it can be used to make the fittings for machines with high medium load and speed of work. Such as the automobile knuckle, gear wheel and axis of the machine tools. If it had been quenching and tempering with medium temperature, it will be a great choice for fittings with high load, low impact and good wearing resistance. Such as the gear wheel, lantern ring and etc. And after quenching and low-temperature tempering, the properties will be better than the last one. People usually use it to make the parts with good wearing resistance and handle high load, low impact. And you can see the principal axis, mechanical bolt and etc are made of it.

Stock Size

Plate  Thickness 20-120mm
Width 2200mm
Length 4000-10000mm
round bar  Diameter 16-450mm
Length 4000-10000mm

Sizes and Conditions

Our steel materials are in different sizes and conditions specially catered to our customers' needs. They come in round bars, flat bars, plates and block.

The conditions of the materials vary from pre-hardened, hot rolled,annealed, quenched and tempered to surface conditions such as black, pre-machined,griding and polish.

Why choose us?


Quality Assurance from government owned steel mills

At die & tool steel , we meticulously source materials only from steel manufacturers to ensure consistency in providing the finest quality steel products for our customers.

Being in the competitive market today, we clearly understand that customers are looking for products that are not only best in class but also affordably priced. We are confident that we are able to ful fil these two equally vital aspects –our customers' continuous support over the past two decades is the most heartfelt recognition to us.

Speedy and Timely Delivery

Knowing that delivering goods to customers' hands on time is as important as providing quality goods, we treat every business transaction as a priority. Be it a raw material or a finished material with machining or heat treatment, every effort will be made to get your purchase order to you in the shortest lead time.

Quality Commitment

In order to realise competitive products to fulfil our customers' demands and quality considerations, our integrated quality and work management system is continuously being improved and developed further. We document this for our customers by having our quality management system certified in accordance with ISO 9001. This measure is accompanied by audits and recertification's on a regularly prescribed basis.

Our service

We provide quality special steel for all industries.

Orders of any size, any length, ship fast

We carry a unique inventory of specialty special steel

Provide related value-adding services :

metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment.

Sawing for small or large quantities, sawing-to-size.

Excellent customer service



Hot Rolled Alloy Steel Round Bar GB40CRH For Machinery Industry 1

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Guangzhou Changfeng Steel Co., LTD

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