Steel pipes are widely used in applications such as water pipelines, oil pipelines, chemical pipelines, and even edible oil pipelines. They play a decisive role in crude oil transportation.
Our company provides professional OEM services to meet diverse customer needs in steel pipe manufacturing and supply.
|
Standard |
Grade |
Chemical Composition (wt%) |
||||||||
|
C |
Si |
Mn |
P |
S |
Cu |
Ni |
Cr |
Mo |
||
|
ASTM A519 |
SAE 1020 |
0.18-0.23 |
/ |
0.30-0.60 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
|
|
SAE 1030 |
0.28-0.34 |
0.60-0.90 |
≤0.040 |
≤0.050 |
||||||
|
SAE 1045 |
0.43-0.50 |
/ |
0.60-0.90 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
/ |
|
|
SAE 1524 |
0.19-0.25 |
1.35-1.65 |
≤0.040 |
≤0.050 |
||||||
|
SAE 1541 |
0.36-0.44 |
/ |
1.35-1.65 |
≤0.040 |
≤0.050 |
/ |
/ |
/ |
/ |
|
|
SAE 4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
≤0.040 |
≤0.040 |
0.80-1.10 |
0.15-0.25 |
|||
|
EN 10297-1 |
E275 |
≤0.21 |
≤0.35 |
≤1.40 |
≤0.030 |
≤0.035 |
/ |
/ |
/ |
/ |
|
E315 |
≤0.21 |
≤0.30 |
≤1.50 |
≤0.030 |
≤0.035 |
/ |
||||
|
E355 |
≤0.22 |
≤0.55 |
≤1.60 |
≤0.030 |
≤0.035 |
|||||
|
41Cr4 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
0.90-1.20 |
||||
|
34CrMo4 |
0.30-0.37 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
/ |
0.15-0.30 |
0.90-1.20 |
||
|
42CrMo4 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.035 |
≤0.035 |
/ |
0.15-0.30 |
0.90-1.20 |
||
|
JIS G3445 |
STKM13A |
≤0.25 |
≤0.35 |
0.30-0.90 |
≤0.040 |
|||||
|
STKM13B |
≤0.25 |
≤0.35 |
0.30-0.90 |
≤0.040 |
/ |
|||||
FAQ
Q: What is a Seamless Steel Tube?
A: A seamless steel tube is a pipe made without any welded joints. It is manufactured by hot-rolling or cold-drawing a solid steel billet through a piercing process. This results in a uniform, strong tube with high pressure and temperature resistance.
Q: What are the advantages of seamless steel tubes over welded tubes?
A: Seamless steel tubes have higher strength, better corrosion resistance, and superior pressure-bearing capability. Unlike welded tubes, they have no weak points at seams, making them ideal for critical applications such as oil & gas pipelines, boilers, and hydraulic systems.
Q: What standards do your seamless steel tubes meet?
A: Our seamless steel tubes comply with international standards such as ASTM A106, ASTM A53, DIN 2391, EN 10210, and GB/T 8162. Specific standards depend on the customer's application and regional requirements.
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