Products: Ready to hone tube / precision cold-drawn steel tube

Standard: EN10305-1, DIN2391, GB/T 3639

Steel grade: ST52/16Mn, 20#, 45#, 25Mn, 27SiMn

Description: precision cold drawn seamless steel tube is used for mechanical machinery and hydraulic equipment, with high accuracy and cleaning & smooth surface. Choosing this precision cold drawn seamless tube to produce mechanical machinery and hydraulic equipments, which can greatly save machining time, improving material usage and reduce the costs, thus it is an efficient way to increase the enterprises profits.


Chemical Composition： 

	C	Si	Mn	S	P	Cr	Ni
20#	0.17-0.23	0.17-0.37	0.35-0.65	0.035	0.035	≤0.25	≤0.30
45#	0.45-0.5	0-0.37	0.50-0.80	0.035	0.035	≤0.25	≤0.30
16Mn/ST52	≤0.20	≤0.55	1.0-1.60	0.045	0.045		0.015-0.06
25Mn	0.22-0.30	0.17-0.37	0.70-1.00	0.035	0.035	≤0.25	≤0.30
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.03	0.03

Tolerance:

ID (mm)	WT (mm)	OD(mm)	Length (m)	straightness
0.08-0.30	±5% - ±7%	±0.30	≤13.5	≤0.3mm/1000mm

Mechanical Properties:

	BK		BK+S
	T.S	E	T.S	Y.S	E	Hardness
	δb N/mm²	δ5%	δb N/mm²	δb N/mm²	δ5%	HB
20#	≥580	5	≥550	≥470	10	175
45#	≥645	4	≥600	≥520	10	207
16Mn/ST52	≥640	4	≥580	≥420	10	190
25Mn	≥640	5	≥600	≥520	14	195
27SiMn	≥800	5	≥760	≥510	10	230