Seamless Steel Honed Tube/Pipe

Product Description

Seamless steel honed tube is a A106B/C20 cold-drawn seamless steel tube with an internally honed surface (Honed & SRB - Skived and Roller Burnished), offering precise dimensions and a smooth surface finish, seamless steel honed pipe is suitable for hydraulic cylinder.

Seamless steel honed tube advantages

Highly Smooth Inner Surface: Seamless honed tubes boast a maximum surface roughness of Ra 0.4 micrometers, ensuring exceptional smoothness.

Excellent Welding Capability: ST52 honed cylinder tube exhibit excellent welding properties, making them suitable for manufacturing steel cylinders.

High Precision Tolerance: Honed tube for hydraulic cylinder can meet inner diameter tolerances such as H8, H9, as an experienced seamless honed pipes manufacturer, Chenyu can produce seamless steel honed tubes as per customer requirements and internal diameter sizes.

Resilient Seamless Tubes for High Pressure: Produced from seamless cold-drawn tubes, honed tubes are capable of withstanding higher pressures, making them ideal for hydraulic cylinders.

Technical Parameter

Material:

Popular standard and steel grade
EN10305-1	E355 E235 E410 E470 C45E
DIN2391-1	ST52 ST45
ASTM A519	SAE1020 SAE1045 SAE1026
GB/T	20# 45# 16Mn Q345B Q345D Q345E 42CrMo 27SiMn

Specification: Outer diameter(mm) 50-420mm;Inner diameter(mm)40-400mm

Chemical composition

Chemical composition（%）
Material	C%	Mn%	Si%	S%	P%
20#	0.17-0.23	0.35-0.65	0.17-0.37	≤0.035	≤0.035
ST45	≤0.21	≥0.4	≤0.35	≤0.025	≤0.025
E255	≤0.21	0.4-1.1	≤0.35	≤0.025	≤0.025
45#	0.42-0.50	0.50-0.80	0.17-0.37	≤0.035	≤0.035
Q345B	≤0.20	≤1.70	≤0.50	≤0.035	≤0.035
E355	≤0.22	≤1.6	≤0.55	≤0.025	≤0.025
ST52	≤0.22	≤1.6	≤0.55	≤0..04	≤0..04
25Mn	0.22-0.29	0.70-1.0	0.17-0.37	≤0.035	≤0.035
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	≤0.035	≤0.035

I.D Tolerance: H8-H9

Tolerance
ID(mm)		30~50	50~80	80~120	120~180	180~250	250~315	315~400	400~500	500~630
Deviation (um)	H8	+39 0	+46 0	+54 0	+63 0	+72 0	+81 0	+89 0	+97 0	+110 0
Deviation (um)	H9	+62 0	+74 0	+87 0	+100 0	+115 0	+130 0	+140 0	+155 0	+175 0

Length: 3-9m(Customers usually choose the 4-7.5m)

STRAIGHTNESS: 1/1000

ID roughness: RA 0.4micron(max)

Technology: Honed & SRB(SKIVED AND ROLLER BURNISHED)

Mechanical properties:

Mechanical properties
Final Supply Condition	Cold finished(Hard) (BK)		Cold drawn and stress-relieved (BK+S or + SR)			Hardness HB
Parameters	T.S obN/mm²	Elongation δ5%	T.S obN/mm²	Y.S obN/mm²	Elongation δ5%	Hardness HB
20#(A106B,ST45,E255)	≥550	≥8	≥520	≥375	≥12	175
45#(CK45)	≥650	≥5	≥600	≥500	≥10	190
Q345B(ST52.E355)	≥640	≥5	≥600	≥520	≥15	190
25Mn	≥640	≥5	≥600	≥510	≥15	195
27siMn	≥840	≥5	≥720	≥600	≥10	210