Specifications

seamless hot-rolled steel tube for hdraulic pillar service
1Certification:API &ISO
2.Business:type manufacturer

SEAMLESS HOT-ROLLED STEEL TUBES FOR HYDRAULIC PILLAR SERVICE

APPLICATION:Used in making the coal mine hydraulic support and pillar other hydraulic equipment

Dimension Tolerances

 

PIPE SIZE (mm)		TOLERANCES(%)
OD		±1
WT	≤20	±12.5
	>20	+12.5,  -10

 

 Mechanica Properties

 

Grade	Sample Heat Treatment	Mpa Tensile Strength	Mpa Yield Strength	% Eongation	%Impact Energy	Aku2 J Impact	HBHardness ≤MAX
20 35 45		400 510 590	245 305 335	20 17 14
27SiMn	920°C±20°C Waterquenching, 450°C±50°C Temper; Coolant:oil or water	980	835	12	40	39	217

Chemical Composition

Grade	%Chemical composition								Nb
	C	Si	Mn	P≤	S≤	Cr≤	Ni≤	Cu≤
20	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.25	0.25	0.20
35	0.32-0.40	0.17-0.37	0.50-0.80	0.035	0.035	0.25	0.25	0.20
45	0.42-0.50	0.17-0.37	0.50-0.80	0.035	0.035	0.25	0.25	0.20
27SiMn	0.24-0.32	1.10-1.40	1.1-1.4	0.035	0.035	0.30	0.25	0.30

Products can be also supplied according to the standard of ASTM A519, DIN 1629,JIS G 3473

Should any of these items be of interest to you, please let us know. We will be happy to give you a quotation upon receipt of your detailed requirements.

We look forward to receiving your enquires soon.

Sincerely