SAE52100 GCr15 EN31 High Chromium Bearing Steel Hollow Bar for Axle

• Type: Seamless
• Technique: Hot Rolled
• Material: Alloy Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Hydraulic/Automobile Pipe, Machinery Industry, Mining
• Section Shape: Round
• Model NO.: SAE52100/EN31/SUJ2/GCr15
• Grade: EN31/SAE52100/GCr15/SUJ2
• Processing surface: Peeled, Turned, Polished
• Delivery Condition: Hot Rolled, forged
• Test: SGS / Ut 100% / Element Testing
• Production Process: Ef/Eaf+Lf+Vd/ESR
• Certificate: ISO/Mill Certificate
• MOQ: 1MT
• Payment: 30% Deposit, balance by L/C at sight or T/T
• Sample: Free
• Surface: Black surface
• Lead time: 7-15 days
• Stock: Available
• Transport Package: Nude or as Customers′ Demand
• Specification: DN6-290**4000-10000
• Trademark: CF STEEL
• Origin: Guangdong, China
• HS Code: 7306900090
• Production Capacity: 1000t/Month

Product Description

SAE52100 GCr15 EN31 High Chromium Bearing Steel Hollow Bar for Axle

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