Seamless Steel Tubes <small>(for Hydraulic Roof Support)</small> Manufacturer

Seamless Steel Tubes (for Hydraulic Roof Support)

Seamless Steel Tubes <small>(for Hydraulic Roof Support)</small>

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Shown here are hydraulic roof supports, another area our seamless steel tubes are commonly used. Built to GB/T17396-1998, ASTM A519, or DIN1629 standards, Yuahua's seamless steel tubes are primarily made from steel grades 20, 45 and 27SiMn.

Uses
In mining applications, Yuanhua's seamless steel tubes are usually installed on hydraulic roof supports and other hydraulic equipment.

Chemical and Mechanical Performance

Steel Grade	Chemical composition (%)								Mechanical properties
	C	Si	Mn	P	S	Ni	Cr	Cu	Yield strength		Tensile strength	Elongation
									MPa		MPa	Δ (%)
				≤					For T in mm			≥
									T≤16	T ＞ 15
10	0.07-0.13	0.17-0.37	0.35-0.65	0.030	0.030	≤0.30	≤0.15	≤0.25	205	195	335-475	24
20	0.17-0.23	0.17-0.37	0.35-0.65	0.030	0.030	≤0.30	≤0.25	≤0.25	245	235	410-550	20

Outer Diameter, Wall Thickness Difference

Grade	Chemical Composition (%)								Mechanical Properties
	C	Si	Mn	P	S	Cr	Ni	Cu	Yield strength	Tensile strength	Elongation	Reduction of area
				≤					MPa	MPa	Δ (%)	Ψ (%)
				≤					≥
20	0.17- 0.23	0.17- 0.37	0.35- 0.65	0.035	0.035	0.25	0.25	0.20	245	400	20	/
45	0.42- 0.50	0.17- 0.37	0.50- 0.80	0.035	0.035	0.25	0.25	0.20	335	590	14	/
27SiMn	0.24- 0.32	1.10- 1.40	1.10- 1.40	0.035	0.035	0.30	0.30	0.30	500	680	12	40
45Mn2	0.42- 0.49	0.17- 0.37	1.40- 1.80	0.035	0.035	0.25	0.25	0.25	560	700	13	/