Hot Selling For Seamless Precision Steel Tubes - SAE52100 GCr15 Bearing Steel Tube – Haihui

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Hot Selling For Seamless Precision Steel Tubes - SAE52100 GCr15 Bearing Steel Tube – Haihui Detail:

It has high and uniform hardness and good wear resistance. It is used to make small section quenching and tempering parts with large load and large normalizing parts with small stress.

Usage: used for making various bearing rings and rolling bodies. For example: making internal combustion engine, electric locomotive, automobile, tractor, machine tool, steel rolling machine, drill Steel rollers and ferrules for transmission bearings of exploration machines, mining machinery, general machinery and high-speed rotating machinery with high load.

Products: GB/T18254 GCr15 Stainless Bearing Steel Tube.
Standard: SKF/ ASTM/DIN/JIS/BS/GB.
Size(mm): OD:8mm ~ 101.6mm; WT:1.0mm ~ 10mm.
Length: Fixed(6m,9m,12,24m) or normal length(5-12m).

1. Ordinary annealing: heating at 790-810 ℃, furnace cooling to 650 ℃, air cooling – hb170-207.

2. Isothermal annealing: 790-810 ℃ heating, 710-720 ℃ isothermal, air cooling – hb207-229.

3. Normalizing: 900-920 ℃ heating, air cooling – hb270-390.

4. High temperature tempering: 650-700 ℃ heating, air cooling – hb229-285.

5. Quenching: 860 ℃ heating, oil quenching – hrc62-66.

6. Low temperature tempering: 150-170 ℃ tempering, air cooling – hrc61-66.

7. Carbonitriding: 820-830 ° C for 1.5-3 hours, oil quenching, – 60 ° C to – 70 ° C cryogenic treatment + 150 ° C to + 160 ° C tempering, air cooling – HRC ≈ 67.

GCr15 Steel Pipe4
GCr15 Steel Pipe6
GCr15 Steel Pipe5

1) Equivalent standard of Gcr 15/AISI 52100 Bearing Steel pipe
GB GCr15 bearing steel is GB standard Alloy Bearing steel, It belong to the high quality high carbon, alloy chromium,manganese steel. GB GCr15 properties is a chromium,manganese alloy steel specification. GCr15 is equivalent to AISI 52100, DIN 100Cr6. Most applications can replace each others.

GB	ISO	ASTM	JIS	DIN	NF	Sweden
GB/T18254	9001:2008	52100	SUJ2	100Cr6	100C6	SKF3

2)Chemical composition

CNS-SUJ2	C(%)	Si(%)	Mn(%)	P(%)	S(%)	Cr(%)	Mo(%)	Ni(%)	Cu(%)
CNS-SUJ2	0.95-1.10	0.15-0.35	≦0.5	≦0.025	≦0.025	1.3-1.6	≦0.08	≦0.25	≦0.25
GB-GCr15	C(%)	Si(%)	Mn(%)	P(%)	S(%)	Cr(%)	Mo(%)	Ni(%)	Cu(%)
GB-GCr15	0.95-1.05	0.15-0.35	0.25-0.45	≦0.025	≦0.025	1.40-1.65	≦0.1	≦0.3	≦0.25
JIS-SUJ2	C(%)	Si(%)	Mn(%)	P(%)	S(%)	Cr(%)	Mo(%)	Ni(%)	Cu(%)
JIS-SUJ2	0.95-1.10	0.15-0.35	≦0.5	≦0.025	≦0.025	1.3-1.6	≦0.08	≦0.25	≦0.25
ASTM-E52100	C(%)	Si(%)	Mn(%)	P(%)	S(%)	Cr(%)	Mo(%)	Ni(%)	Cu(%)
ASTM-E52100	0.98-1.10	0.15-0.35	0.25-0.45	≦0.025	≦0.025	1.3-1.6	≦0.1	≦0.25	≦0.35
100Cr6（W3）	C(%)	Si(%)	Al(%)	Mn(%)	P(%)	S(%)	Cr(%)	Cu(%)
100Cr6（W3）	0.93-1.05	0.15-0.35	≦0.05	0.25-0.45	≦0.025	≦0.015	1.35-1.60	≦0.3

3) Thermal properties of Gcr 15/AISI 52100 Bearing Steel Pipe

Thermal Properties		Conditions
Thermal Properties		T (0C)	Treatment
Thermal Expansion (10-6/0C)	11.9	0-100	Annealed

Process: Cold Rolled, Cold Drawn, Hot Rolled, Hot rolled+Cold Drawn.

Delivery Condition: Cold Finished, Hot Finished, Annealed, Spheroidize Annealed, Quenched and Tempered.

Surface: Black, Peeled (K12), Turned & Polished (H10, H11), Precision Ground (H9, H8), Honed or SRB(H9, H8).

1. Cleanliness and freedom from objectionable microscopic slag type inclusions.

2. Shallow decarburized surface.

3. Good surface quality.

4. Excellent micro-structure uniformity.

5. Tight tolerances, resulting in reduced machine time.

6. Wear resistance, long service life.

Third Party inspection acceptable. such as SGS, BV etc.

1. Mainly used for manufacturing ordinary rolling bearing ring.

2. Other applications such as used for automotive industry and bearings in rotating machinery.

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