SAE52100/GCr15/EN31/SUJ2 Alloy Bearing Steel Bar for Mechanical

SAE52100/EN31/SUJ2/GCr15 Hot Rolled Bearing Alloy Tool Steel Pipe Steel Bar Steel Rod Steel flat

EN31/SAE52100/GCr15/SUJ2 steel refers to a high carbon and chromium bearing steel with less alloy content. After quenching and low temperature tempering, it has high hardness, uniform structure, good wear resistance and high contact fatigue performance.

1. Equivalent Grade

Chinese	American	German	Japanese
GB	AISI	DIN	JIS
GCr15	SAE52100	EN31	SUJ2

 
2. Chemical Composition (%)

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
GCr15/ SAE52100	0.95-1.05	0.15-0.35	0.20-0.40	≤0.027	≤0.020	1.3-1.65	≤0.10	≤0.25	≤0.30
EN31	0.95-1.05	0.15-0.35	0.25-0.45	≤0.025	≤0.025	1.4-1.65	≤0.08	≤0.25	≤0.30

3. Surface Treatment
1) Round bar: Black /Grinding /Polished /Peeled /Turned
2) Steel plate: Black /Milling /Machined

4. SAE52100/GCr15/EN31/SUJ2 Ready Stock
Round Bar: diameter 4-290mm,length 3000-6000mm
Flat Bar: thickness 20-200mm, width 155-2200mm,length 2000-6000mm
All the dimensions can be customerized as fresh production with MOQ.

5. Characteristic
1) Good hot working performance.
2) Good machinability after spheroidizing annealing.
3) High hardenability and good comprehensive performance.
4) A kind of high carbon and chromium bearing steel which most widely used with a good permance and less alloy content.
5) High hardness, uniform organization, good wear resistance, high contact fatigue performance after quenching and tempering. 

6. Competitive Advantage
1) Good purity and homogeneity.
2) Good dimensional stability during heat treatment.
3) Good machinability (roughing, grinding and drilling).
4) Excellent preparation for nitriding, both ionic and gaseous, induction hardening to increase the mechanical properties.

7. SAE52100/GCr15/EN31/SUJ2 Heat Treatment

Quenching			Tempering
Heating temperature/ºC	Cooling way	Hardness  (HRC)	Tempering temperature/ºC	Cooling way	Hardness (HRC)
830-850	Oil Cooling	62-65	150-190	Air Cooling	58-62

8. SAE52100/GCr15/EN31/SUJ2 Mechanical Properties

Tensile strength	Yield strength	Elongation	Hardeness
σb (MPa):861.3	σs (MPa):518.42	δ5 (%):27.95	25.8HRC

9. SAE52100/GCr15/EN31/SUJ2 Pipe Round Sheet Flat Steel picture show



10. Main Application
1) For making all kinds of bearing ring and rolling element, such as steel ball roller and ferrule of  internal combustion engine, electric motorcycle, automonilrd, tractors, machine tools, rolling mill, boring machine, mining machinery, general machinery, high load and high speed roating mechanical transmission bearing.
2) Sometimes also ued to make tools, such as pumching die and measuring tool.


11. Payment Term
1) T/T 30% in advance, 70% balance against BL copy.
2) T/T 30% as deposit, 70% balance L/C at sight.

12. Packing
Nude or as customers' request.

13. Delivery
1) For abundant stock, 7-15 days.
2) For customized products, 15-30 days.

14. About Us
Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specializing in this line in China since 2005. Our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.
Our company equips with large-sized Vertical saw machines, Horizontal saw machines, Milling machines, Grinding machines and other advanced equipments to provide customers with cutting and other processing services. 


15. FAQ
Q: Are you a manufacturer or merely a trader?
A: We are trading company act as exporting Steel Products with our own factory,
we can manufacture the products as in cutomer's requirement,wholesale and retail all kinds of domestic mould steel,the price we offered is very competitive compared with other agents.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as SGS, CE,ISO if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival. Third,the products we export are mainly from ShaGang group, WenFeng group, XingCheng group, DongTe group,DaYe and so on, the quality are certained.
 
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.