Honed tube for hydraulic cylinder

Product Parameters
standard	GB/T3639-2000	DIN2391	EN10305	ASTM A519
metarial	C20 CK45 Q355B Q355D	E355/ST52 SAE1026	4130 4140	STKM 13C
Heat treatment	BK+S
size	I.D:30mm-400mm		O.D:40mm-480mm
length	Fixed length	Random length or as requests of customers
Straightness	1/1000
Technology	Honed SRB(SKIVED AND ROLLER BURNISHED）
Scope	Honed tube for hydraulic cylinder,swivel crane,injection machine and construction machine application