Low Temperature Seamless Steel Tube , 1 - 12m Length Carbon Seamless Steel Pipe
Product Details
precision stainless steel tubing
,seamless carbon steel tube
350mm Cold Drawn Carbon Seamless Steel Pipe For Chemical Composition
Cold drawn or cold-rolled precision seamless steel tubes
Relative standard :
GB/T222 permissible tolerance for chemical composition of steel products.
GB/T223.5 Steel and iron-Determination of acid-soluble silicon and total silicon content-Reduced molybdosilicate spectro photometric method(GB/T223.5-2008,ISO 4829-1:1986,ISO 4829-2:1988,MOD)
Mechanical properties
Steel grade 10# 20# 35# 45# Q345B
| Steel grade | deliver conditions | |||||||||||
| +C | +LC | +SR | +A | +N | ||||||||
| Rm/Mpa | A/% | Rm/Mpa | A/% | Rm/Mpa | ReH/Mpa | A/% | Rm/Mpa | A/% | Rm/Mpa | ReH/Mpa | A/% | |
| No less than | ||||||||||||
| 10 | 430 | 8 | 380 | 10 | 400 | 300 | 16 | 335 | 24 | 320-450 | 215 | 27 |
| 20 | 550 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| 35 | 590 | 5 | 550 | 7 | 510 | 17 | ≥460 | 280 | 21 | |||
| 45 | 645 | 4 | 630 | 6 | 590 | 14 | ≥540 | 340 | 18 | |||
| Q345B | 640 | 4 | 580 | 7 | 580 | 450 | 10 | 450 | 22 | 490-630 | 355 | 22 |
Deliver condition:
Cold working/Hard condition:+C
No heat treatment after the final cold working process.
Cold working/Soft condition:+LC
After the final treatment there is a suitable cold working process
Stress relieving annealed conditio:+SR
After the final cold working process there is a stress relief heat treatment in a controlled atmosphere
Annealed condition:+A
After the final cold working process the tubes are fully annealed in a controlled atomosphere.
Normalised condition:+N
After the final cold working operation the tubes are normalized in a controlled atomosphere.
The permissible tolerances of the internal and external diameter unit:mm
| Wall thickness(S)/extrernal diameter | Permissible tolerance |
| S/D≥1/20 | According to the specified value of the table 1 |
| 1/40≤S/D<1/80 | According to 1.5 times of specified value of the table 1 |
| S/D<1/40 | According to double of specified value of the table 1 |
Length is 2000-12000mm Fixed length and multiple length is available.
Tolerance for length , a)the length ≤5000mm +5,0mm
B)the length >5000mm +10,0mm
Every multiple length should leave incision margin according to the following requirement for the steel tubes delivered by multiple length.
- External diameter≤159mm:5mm~10mm
- External diameter>159mm:10mm~15mm
Curvature:≤3.0mm/m
The steel tubes’ total length curvature external diameter ≥16mm
- ReH≤500Mpa,≤0.15%L
- ReH>500Mpa,≤0.20%L
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of Seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
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