Standard	Material	Chemical Composition
		C	Si	Mn	S	P	Cr	Mo
GB/T 18254	GCr15	0.95-1.05	0.15-0.35	0.25-0.45	<0.25	<0.25	1.40-1.65
JIS G 4805	SUJ2	0.95-1.10	0.15-0.35	<0.50	<0.25	<0.25	1.30-1.60	<0.08
ASTM A 295	52100	0.98-1.10	0.15-0.35	0.25-0.45	<0.25	<0.25	1.30-1.60	<0.10

Cages

In general, we apply pressed steel ribbon cages & pressed steel snap cages. For extra-high speed application, synthetic-resin and nylons cages will be used upon request.

Shields and Seals
Most often we apply SPCC for shields, and carbon steel & stainless steel can be used upon request.
For seals, we use Buna Nitrile. while fluorocabon, silicone, and teflon seals are commonly specified for high temperatures.