China Supplier Sch40 DN15 Q235B Q355b API 5L Q345b Chromoly Carbon Black Thick Wall Large Diameter Cold Drawn Steel Seamless Tube/Pipe
Short Description:
Q355 steel pipe is a Chinese low alloy high strength structural steel pipe, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591 -2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D.
Q355 steel pipe is a low alloy, high-strength steel that is used in welded structures supporting stress and heavy loads. The Q references the yield point, while the number 355 indicates its yield strength.
Characteristics of Q355 Steel Pipe
Q355 steel pipe is a structural steel with a yield strength of 345 MPa and tensile strength of 450 MPa. It has terrific processing performance and compressive strength, which can be used to manufacture high-pressure gas pressure vessels containing less than 500 liters. Q355 also has a protective layer of rust resistance.
Uses of Q355 Steel Pipe
Q355 steel pipe has excellent mechanical properties, great weldability, and ample corrosion resistance. It can be utilized to manufacture and produce petroleum storage tanks, high-pressure vessels, boilers, ships, power stations, and many other high-load structural parts.
Size: 34mm-610mm.
W.T.: 3.5mm-50 mm.
Shape: Round.
Production type: Hot rolled or Hot expended .
Length: Single random length/ Double random length or as customer’s actual request max length is 12m
We insist around the principle of enhancement of ‘High good quality, Performance, Sincerity and Down-to-earth working approach’ to provide you with superb assistance of processing for China Supplier Sch40 DN15 Q235B Q355b API 5L Q345b Chromoly Carbon Black Thick Wall Large Diameter Cold Drawn Steel Seamless Tube/Pipe, We sincerely welcome all guests to set up business relationships with us on the basis of mutual benefits. Please contact us now. You will get our professional reply within 8 hours.
We insist around the principle of enhancement of ‘High good quality, Performance, Sincerity and Down-to-earth working approach’ to provide you with superb assistance of processing for China A53 Gr. B Seamless Steel Pipe, We welcome you to visit our company, factory and our showroom displayed various items that will meet your expectation, meanwhile, it is convenient to visit our website, our sales staff will try their efforts to supply you the best service. If you require more information, you should do not hesitate to contact us by E-mail or telephone.
|
Steel Grade |
Quality Grade |
C % (≤) |
Si % (≤) |
Mn %(≤) |
P %(≤) |
S% (≤) |
Cr% (≤) |
Ni% (≤) |
Cu %(≤) |
N% (≤) |
|
Q355 |
Q355B |
0.24 |
0.55 |
1.6 |
0.035 |
0.035 |
0.3 |
0.3 |
0.4 |
0.012 |
|
|
Q355C |
0.2 |
|
|
0.03 |
0.03 |
|
|
|
0.012 |
|
|
Q355D |
0.2 |
|
|
0.025 |
0.025 |
|
|
|
– |
|
Yield Strength (≥N/mm2), Thickness or Dia. (d) in mm |
||||||||||
|
Steel Grade |
Quality Level |
d≤16 |
16< d ≤40 |
40 < d ≤63 |
63 < d ≤ 80 |
80< d ≤ 100 |
100< d≤ 150 |
150 < d≤ 200 |
200 < d ≤ 250 |
250 < d ≤ 400 |
|
Q355 |
Q355B |
355 |
345 |
335 |
325 |
315 |
295 |
285 |
275 |
– |
|
Q355C |
– |
|||||||||
|
Q355D |
265 |
|||||||||
|
Tensile Strength (N/mm2), Dia. (d) mm |
|||||
|
Steel Grade |
Quality Level |
d≤100 |
100 < d ≤ 150 |
150 < d ≤ 250 |
250 < d ≤ 400 |
|
Q355 |
Q355B |
470 – 630 |
450 – 600 |
450 – 600 |
– |
|
Q355C |
– |
||||
|
Q355D |
450 – 600 |
||||
|
Dia. (d) mm; Elongation (%) |
||||||
|
Sample direction |
d≤40 |
40 < d ≤ 63 |
63 < d ≤ 100 |
100 < d ≤ 150 |
150 < d≤ 200 |
250 < d ≤ 400 |
|
Horizontal |
20 |
19 |
18 |
18 |
17 |
17 |
|
Vertical |
22 |
21 |
20 |
18 |
17 |
17 |
|
Quality |
Temperature |
Longitudinal Impact Energy (J), ≥ |
Transverse Impact Energy (J), ≥ |
|
Q355B |
20 ℃ |
34 |
27 |
|
Q355C |
0 ℃ |
34 |
27 |
|
Q355D |
-20 ℃ |
34 (for thickness ≥250mm) |
27 (for thickness ≥250mm) |
|
China |
ISO |
European Union |
|||
|
Standard |
Grade |
Standard |
Grade |
Standard |
Grade (Material Number) |
|
GB/T 1591 -2018 |
Q355B |
ISO 630-2 |
S355B |
EN 10025-2 |
S355, S355JR (1.0045) |
|
Q355C |
S355C |
S355J0 (1.0553) |
|||
|
Q355D |
S355D |
S355J2 (1.0577) |
|||
Straightening
Post annealing, the goods are passed through a seven roller straightening machine to achieve proper straightening of the tubes.
Eddy current
Post straightening, each tube is passed through eddy current machine to detect for surface cracks and other defects . Only the tubes that pass eddy current are fit for delivery to customers.
Finishing
Each tube is either oiled with corrosion resistant oil or varnished for surface protection and corrosion resistant as per customers requirement, each tube end is covered by plastic end caps to avoid damage in transit, the marking and specs are put and the goods are ready for dispatch.
Q355 Hot Rolled Carbon steel seamless pipes are extensively applied in the nuclear device, gas conveyance, petrochemical, shipbuilding and boiler industries, with characteristics of high corrosion resistance combined with suitable mechanical properties.
- Nuclear device
- Gas conveyance
- Petrochemical industries
- Shipbuilding and boiler industries
We insist around the principle of enhancement of ‘High good quality, Performance, Sincerity and Down-to-earth working approach’ to provide you with superb assistance of processing for China Supplier Sch40 DN15 Q235B Q355b API 5L Q345b Chromoly Carbon Black Thick Wall Large Diameter Cold Drawn Steel Seamless Tube/Pipe, We sincerely welcome all guests to set up business relationships with us on the basis of mutual benefits. Please contact us now. You will get our professional reply within 8 hours.
China Supplier China Gr. B and A53, We welcome you to visit our company, factory and our showroom displayed various items that will meet your expectation, meanwhile, it is convenient to visit our website, our sales staff will try their efforts to supply you the best service. If you require more information, you should do not hesitate to contact us by E-mail or telephone.
