27SiMn steel honed tube: 1 use for hydraulic cylinder 2. OD:40 - 377mm T:2.5-55mm 3 Grade 20# 45# ST52 27SiMn 25Mn

27SiMn steel honed tube :

seamless carbon steel tube

Inside diameter from 40 to 300mm,

Max length 16m (Inside surface honed )

Metric size

Inside diameter from 40 to 1000mm,

Max length 20m.

Straightness: 0.5 /1000

Tolerance EXT: DIN 2391

Tolerance INT: ISO H8

Roughness(Ra): 0.2 to 0.4µ

Typecold drawing, normalizing treatment, honing or skiving, plate chrome.

CHEMICAL COMPOSITION (%)

Si (Max)	Mn(Max)	C(Max)	P(Max)	S(Max)
0.55	1.60	0.22	0.025	0.025

MECHANICAL PROPERTIES

Tensile strength       min	Yield Point     Min	Elongation %Min
840N/mm2	805	7.5

Marking: MEITUO, ID, OD

Length: unfixed length or fixed length

Package: banding with steel strips, braiding parcel at outside

Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.

27SiMn steel honed tube