We are committed to providing one-stop service for steel pipe products to customers around the world.
We are committed to providing one-stop service for steel pipe products to customers around the world.
Precision steel tube is a high-precision steel tube material processed by cold drawing or hot rolling. Because the inner and outer walls of precision steel pipes have no oxide layer, high pressure without leakage, high precision, high smoothness, cold bending without deformation, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as cylinders or The oil cylinder can be a seamless tube or a welded tube.
Application
The internal and external diameter could control within +/- 0.01 mm. In the guarantee of anti-bending strength and torque strength same, the weight of precision pipe is lighter. It can be widely used in manufacturing precision machinery parts and engineering structure, and also commonly used to produce various kinds of conventional weapons, barrel, shells, bearing and so on.
|
Size |
|
Size Range |
Tolerance |
|
OD |
6-325mm |
-0.035 -- +0.045mm |
|
|
ID |
2-250mm |
±0.035mm |
|
|
WT |
1-32mm |
depends on sizes |
|
|
Length |
random or fixed length |
+0-3.5mm |
|
|
Straightness |
0.15:1000, 0.4:1000, 0.5:1000 1:1000 or customized |
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|
Surface Roughness |
Ra 0.02—0.4μm |
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For hot rolling precision steel pipe, tolerance of OD is +/- 0.1%.
For cold drawn precision pipe, tolerance allowed in below conditions:
Diameters 6mm to 10mm, normal tolerance condition +/- 0.2%, premium tolerance condition +/- 0.15%.
10mm to 30mm, normal tolerance condition +/- 0.4%, premium tolerance condition +/- 0.2%.
30mm to 50mm, normal tolerance condition +/- 0.45%, premium tolerance condition +/-0.3%.
For outer diameters above 50mm, normal tolerance condition +/- 0.1%, premium tolerance condition +/- 0.8%.
PRECISION CHREME-MOLYBDENUM STEEL TUBE
|
Standard |
GB |
ASTM |
JIS |
DIN |
|
GRADE |
15Cr |
5115 |
SCR415 |
15Cr3 |
|
20Cr |
5120 |
SCR420H |
20Cr4 |
|
|
30Cr |
5130 |
SCR430 |
28Cr4 |
|
|
35Cr |
5132 |
SCR430H |
34Cr4 |
|
|
40Cr |
5140 |
SCR440 |
41Cr4 |
|
|
12CrMo |
A-387CR |
A-387CR |
13CrMo44 |
|
|
15CrMo |
41.494.18 |
4125 |
16CrMo44 |
|
|
20CrMo |
4125 |
4130 |
20CrMo44 |
|
|
25CrMo |
4130 |
SCR420H |
25CrMo4 |
|
|
30CrMo |
SCR420H |
4140 |
34CrMo4 |
|
|
35CrMo |
4140 |
4140 |
42CrMo4 |
|
|
42CrMo |
A-387CR |
|
|
PRECISION ALLOY SEAMLESS STEEL TUBE
|
ASTM |
A335-P1,A335-P2,A335-P12,A335-P11,A335-P22,A335-P9,A335-P5,A369-FP22,A213-T22,A213T11,A213-T12,A213-T2,A213-T1 |
|
GB |
16mo，CR2MO,CR5MO,12crmo，15crmo，12cr1mov， |
|
JIS |
STPA12,STBA20,STPA22,STPA23,STPA24,STBA26, |
|
DIN |
15mo3，13crmo44，16CRMO44,10CRMO910,12CRMO195, |
|
Grade |
Chemical Composition% |
||||
|
C |
Si |
Mn |
P |
S |
|
|
20# |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
0.035 |
0.035 |
|
45# |
0.42-0.50 |
0.17-0.37 |
0.50-0.80 |
0.035 |
0.035 |
|
SKTM13C-T(25Mn) |
0.22-0.29 |
0.17-0.37 |
0.70-1.00 |
0.035 |
0.035 |
|
27SiMn |
0.24-0.32 |
1.10-1.40 |
1.10-1.40 |
0.035 |
0.035 |
|
E355 |
≤0.22 |
≤0.55 |
≤1.6 |
0.025 |
0.025 |
|
Q345B |
≤0.2 |
≤0.5 |
1.00-1.60 |
0.030 |
0.030 |
|
Q345D |
≤0.2 |
≤0.5 |
1.00-1.60 |
0.030 |
0.030 |
|
SAE1026 |
0.22-0.28 |
0.15-0.35 |
0.60-0.90 |
0.040 |
0.050 |
|
Delivery condition |
BKS Cold Drawn & Stress-Relieved |
||
|
Steel Grade |
Rm MPa |
ReH MPa |
Elongation A5(%) |
|
ST45 |
≥520 |
≥375 |
≥15 |
|
ST52(E355) |
≥600 |
≥520 |
≥14 |
|
SAE1026 |
≥600 |
≥510 |
≥15 |
|
45# |
≥600 |
≥520 |
≥10 |
|
20# |
≥520 |
≥375 |
≥15 |
|
Delivery condition |
BK Cold finished |
|
|
Steel Grade |
Rm MPa |
Elongation A5(%) |
|
ST45 |
≥550 |
≥5 |
|
ST52(E355) |
≥640 |
≥5 |
|
SAE1026 |
≥640 |
≥5 |
|
45# |
≥640 |
≥5 |
|
20# |
≥550 |
≥8 |
Precision steel pipe manufacturing flow chart:
Raw Material Inspection – Remove Oxide Layer – Visual Inspection – Heating – Hot Rolling – Pickling and Passivation (Phosphating) – Grinding – Lubrication and Drying – Cold Rolling (Internal and external extraction) – Remove Oil – Ends Cutting – Inspection – Marking – Packing and Storage
As we know, most of precision steel pipe has cold drawn and hot rolled process. On the contrast, cold rolling will be more complicated. Not only the pipe need to be continuous rolled by three roller, but also the test have to be done after extrusion, so to guarantee the quality of the precision pipe materials.
Manufacturing methods of seamless precision pipe includes hot rolling and cold drawn. More over it could be manufactured in welding processes.
Precision steel pipe manufacturing flow chart:
Raw Material Inspection – Remove Oxide Layer – Visual Inspection – Heating – Hot Rolling – Pickling and Passivation (Phosphating) – Grinding – Lubrication and Drying – Cold Rolling (Internal and external extraction) – Remove Oil – Ends Cutting – Inspection – Marking – Packing and Storage
As we know, most of precision steel pipe has cold drawn and hot rolled process. On the contrast, cold rolling will be more complicated. Not only the pipe need to be continuous rolled by three roller, but also the test have to be done after extrusion, so to guarantee the quality of the precision pipe materials.
Manufacturing methods of seamless precision pipe includes hot rolling and cold drawn. More over it could be manufactured in welding processes.
20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 24-26CBM
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 54CBM
40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) 68CBM
In bundle,plastic bags,thin film,wooden pallet,standard seaworthy export packing or as customer demands
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