China DIN2391 St52 Precise Cold Drawn Seamless Steel Pipe Steel Tube with Tolerance /-0.1mm

Product Description

oleraance of size: ±0.05mm(outer diameter).
OD: 21mm~416mm
Wall thickness: 0.8mm~20mm
Technique: Cold drawing
Standard: ASME SA192/SA179, GB/T8162, GB/T8163, GB/T3639, DIN2391-2
Steel material: 20#(AISI 1020/DIN1.0402 C22), 45#(ASTM 1045,DIN45), 20Cr, Q345B, etc
We are professional manufacturer of cold drawn seamless steel pipe in China. Our seamless steel pipe with very high precision of size
Usage: widely used for mechanical processing, Automobile industry, hydraulic equipments
Advantages of our high precision seamless steel pipe:
1.       Smaller caliber
2.       Accept small qty order
3.       Good surface treatment
4.       The pipe with superior performance, suitable for mechanical making
DIN2391 St52 Precise Cold Drawn Seamless Steel Pipe Steel Tube with Tolerance +/-0.1mm

Accurate size
DIN2391 St52 Precise Cold Drawn Seamless Steel Pipe Steel Tube with Tolerance +/-0.1mm

Anti-corrosion Packing
Final Supply Conditions

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and,thus, have a rather high resistance to deformation
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g. bending expanding).
Cold finished and stress-relleved	BKS	Heat treatment is applled following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere

Preicision Seamless Tube Size List

OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)	OD (mm)	Thickness (mm)
Φ13.1	1.5-3	Φ35.5	1.5-7	Φ46.1	1.5-10	Φ93	1.5-15
Φ19.25	1.5-5	Φ35.9	1.5-7	Φ47.8	1.5-10	Φ19-Φ121	1.5-15
Φ22	1.5-5	Φ36.6	1.5-7	Φ49.2	1.5-10
Φ22.2	1.5-5	Φ38	1.5-8	Φ49.5	1.5-10
Φ25	1.5-6	Φ38.4	1.5-8	Φ52.3	1.5-10
Φ26.3	1.5-6	Φ40	1.5-10	Φ53.8	1.5-10
Φ27	1.5-6	Φ40.2	1.5-10	Φ57	1.5-10
Φ28	1.5-6	Φ40.9	1.5-10	Φ59	1.5-10
Φ30	1.5-6	Φ41.3	1.5-10	Φ60	1.5-11
Φ30.25	1.5-6	Φ41.6	1.5-10	Φ62.5	1.5-11
Φ30.9	1.5-6	Φ42	1.5-10	Φ74	1.5-11
Φ31	1.5-7	Φ43	1.5-10	Φ75	1.5-11
Φ32	1.5-7	Φ44.5	1.5-10	Φ76	1.5-11
Φ35	1.5-7	Φ45.8	1.5-10	Φ89	1.5-15

Chemical Composition of seamless steel pipe

Material	Chemical composition (%)
Material	C	Mn	P	S	Si	Ni	Cu
20# AISI 1020	0.17~0.23	0.35~0.65	≤0.035	≤0.035	0.17~0.37	≤0.3	≤0.25
45# ASTM1045, DIN45	0.42~0.5	0.5~0.8	≤0.04	≤0.045	0.17~0.37	≤0.25	≤0.25

Mechanical Properties of seamless steel pipe

Steel material	Tensile Strength Mpa	Yield strength Mpa	Elongation %	Hardness	Straightness
20#	≥510	≥245	≥25	≤156HB	0.3~1.0
45#	≥647	≥355	≥16	≤HRC62	0.3~1.0