Standard Bearing Steel Seamless Steel Tube GCr15

• Type: Seamless
• Technique: Hot Rolled
• Material: Alloy Steel
• Surface Treatment: Black
• Usage: Machinery Industry
• Section Shape: Round
• Model NO.: SAE52100/GCr15/EN31/SUJ2
• Delivery Time: 7days
• Delivery condition: hot rolled black surface
• Condition: stock
• Quality Assurance: 100% UT passed
• Transport Package: Standard/Customized
• Specification: standard/customized
• Trademark: customized
• Origin: China
• HS Code: 7306900090
• Production Capacity: 1000t/Month

Product Description

Standard Bearing Steel Seamless Steel Tube GCr15

1. Features
Superior hardness, 60-67 on Rockwell hardness scale (Rc) at room temperature
High carbon chrome alloy steel
Operates continually at temperatures up to 120°C
Used to produce precision ball bearings and roller bearings
Cost-effective
Long working life

2. Similar Standards

Chinese	American	German	Japanese
GB	AISI	DIN	JIS
GCr15	SAE52100	100Cr6/ EN31	SUJ2

3. Chemical Composition

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
GCr15/52100	0.95-1.05	0.15-0.35	0.2-0.4	≤0.027	≤0.02	1.3-1.65	≤0.1	≤0.25	≤0.3
100Cr6	0.95-1.05	0.15-0.35	0.25-0.45	≤0.025	≤0.025	1.4-1.65	≤0.08	≤0.25	≤0.3

4. Heat Treatment

Quenching			Tempering
Heating Temperature/ºC	Cooling	Hardness/HRC	Heating Temperature/ºC	Cooling	Hardness/HRC
830-850	Oil	62-65	150-190	Air	58-62

5.  Mechanical Properties of ASTM A295 52100 Bearing Steel

Properties	Metric	Imperial
Bulk modulus (typical for steel)	140 GPa	20300 ksi
Shear modulus (typical for steel)	80 GPa	11600 ksi
Elastic modulus	190-210 GPa	27557-30458 ksi
Poisson's ratio	0.27-0.30	0.27-0.30
Hardness, Brinell	-	-
Hardness, Knoop (converted from Rockwell C hardness)	875	875
Hardness, Rockwell C (quenched in oil from 150°C tempered)	62	62
Hardness, Rockwell C (quenched in water from 150°C tempered)	64	64
Hardness, Rockwell C (quenched in oil)	64	64
Hardness, Rockwell C (quenched in water)	66	66
Hardness, Vickers (converted from Rockwell C hardness)	848	848
Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel)	40	40

 

6. Stock Size

Round Bar	Diameter	16-280mm
	Length	4000-10000mm
Flat Steel	Thickness	8-200mm
	Length	3000-4000mm