En10305/ DIN2391 Finish Rolled Seamless Steel Pipe Cold Drawn Steel Tube Cold Rolled Seamless Steel Tube

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Min Order 5 Tons
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Qingdao Ironsteel International Trading Co., Ltd.

VIP   Audited Supplier 11 years
Profile Certified by SGS/BV
One Year
One Year
Seamless
Cold Rolled, Cold Drawn, Finish Rolled
Carbon Steel, Alloy Steel, Stainless Steel
Pickling, Phosphorization, Polishing
Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Round
8mm~140mm
0.8mm~20mm
6meters, 9meters, 12meters, Random Length
Annealing Bright, Phosphating
+/- 0.05mm
Iron&steel
Bundled, Wrapped, Wooden Cased.
DIN2391
China
73041990
Product Description

Precise Seamless steel pipe by cold drawn/cold rolling

OD: 8mm~140mm
Wall thickness: 0.8mm~20mm
Tolerance: +/-0.1mm

Technique: Cold drawing/Cold rolling
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, 40Cr, ST52, ST45, ST37.4, Q345B, etc
Delivery state: BK, BKW, NBK, GBK, BKS
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

Introduction of delivery state
DesignationSymbolDescription
Cold finished (hard)BKTubes do not undergo heat treatment following the final cold forming and,thus, have a rather high resistance to deformation
Cold finished (soft)BKWThe 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-rellevedBKSHeat 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
AnnealedGBKThe last cold forming process is followed by annealing in a controlled atmosphere
NormalizedNBKThe 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)
Φ13.11.5-3Φ35.51.5-7Φ46.11.5-10Φ931.5-15
Φ19.251.5-5Φ35.91.5-7Φ47.81.5-10Φ19-Φ1211.5-15
Φ221.5-5Φ36.61.5-7Φ49.21.5-10  
Φ22.21.5-5Φ381.5-8Φ49.51.5-10  
Φ251.5-6Φ38.41.5-8Φ52.31.5-10  
Φ26.31.5-6Φ401.5-10Φ53.81.5-10  
Φ271.5-6Φ40.21.5-10Φ571.5-10  
Φ281.5-6Φ40.91.5-10Φ591.5-10  
Φ301.5-6Φ41.31.5-10Φ601.5-11  
Φ30.251.5-6Φ41.61.5-10Φ62.51.5-11  
Φ30.91.5-6Φ421.5-10Φ741.5-11  
Φ311.5-7Φ431.5-10Φ751.5-11  
Φ321.5-7Φ44.51.5-10Φ761.5-11  
Φ351.5-7Φ45.81.5-10Φ891.5-15  
Size tolerance 
ODStandard toleranceSpecial tolerance
Outer DiameterGB/T3639DIN2391EN10305O Dthickness
4mm-20mm±0.10 mm±0.08 mm±0.08 mm±0.05mm±0.05mm
20mm-30mm±0.10 mm±0.08 mm±0.08 mm±0.08 mm±0.08 mm
31mm-40mm±0.15 mm±0.15 mm±0.15 mm±0.10 mm±0.08 mm
41mm-60mm±0.20 mm±0.20 mm±0.20 mm±0.15 mm±0.15 mm
61mm-80mm±0.30 mm±0.30 mm±0.30 mm±0.20 mm±0.20 mm
81mm-120mm±0.45 mm±0.40 mm±0.40 mm±0.30 mm±0.30 mm
 
Chemical Composition of seamless steel pipe
MaterialChemical composition (%)
CMnPSSiNiCu
20#
AISI 1020
0.17~0.230.35~0.650.0350.0350.17~0.370.30.25
45#
ASTM1045, DIN45
0.42~0.50.5~0.80.040.0450.17~0.370.250.25
Mechanical Properties of seamless steel pipe
Steel materialTensile Strength MpaYield strength MpaElongation
%
HardnessStraightness
20#51024525156HB0.3~1.0
45#64735516HRC620.3~1.0
 Our Factory has 15 production lines for full range sizes of cold drawn seamless pipes.



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