Precision pipe

Detailed Product Description

Cold-drawn &honed tube
Steel grade :ST45(20#) ck45(45#) ST52(16Mn) 27SiMn 25Mn 34CrMo4
Processing	Cylinder diameter/mm	Length	Straightness	Size accuracy	Wall thickness/mm	Inner bore
						roughness
Cold-drawn	48325	≤12m	0.30.8mm/m		±10%	0.81.6um
Honed tube	48325	≤10m	0.30.8mm/m	H8H9	±10%	0.30.8um
Mechanical Property
Material	Stensil	Yield	Elongation	Hardness
	strength	strength
20#	530 N/mm2	505σsN/mm2	12δs%	175HB
45#	660 N/mm2	630σsN/ mm2	6δs%	207HB
16Mn	595 N/mm2	570σsN/ mm2	9δs%	190HB
27SiMn	840 N/mm2	805σsN/ mm2	7.5δs%	230HB
Honed tube size tolerance
ID size	ID deviation (mm)
	H7	H8	H9	H10
30	0.021	0.0333	0.052	0.084
	0	0	0	0
>30~50	0.025	0.039	0.062	0.1
	0	0	0	0
>50~80	0.03	0.046	0.074	0.12
	0	0	0	0
>80~120	0.035	0.054	0.087	0.14
	0	0	0	0
>120~180	0.04	0.063	0.1	0.16
	0	0	0	0
>180~250	0.046	0.072	0.115	0.185
	0	0	0	0
>250~315	0.052	0.081	0.13	0.21
	0	0	0	0
>315~400	0.0527	0.089	0.14	0.23
	0	0	0	0

Certifications:
Mill certification,with chemical analysis and mechanical tests can be issued and delivered with the tubes.