Introduction
The Seamless Steel Tube are manufactured using hot rolling and cold drawing processes and comply with ASTM A106, DIN 2391 and GB/T 8162 standards.
Features
No weld structure
The Seamless Steel Tube are manufactured using an integral perforation process without longitudinal welds, which are more explosion-resistant and safer than welded pipes under high pressure, high temperature or high strength environments.
Widely applicable
We can provide a variety of materials such as carbon steel, alloy steel, stainless steel, etc. to meet the requirements of different working conditions.
Excellent pressure bearing capacity
Our products have a uniform metal structure and no weak points on the inner wall, which are suitable for high-pressure liquid transportation, boiler heating surfaces, high-temperature gas pipelines and other high-pressure applications.
Strict testing
Each batch of products can undergo water pressure testing, eddy current testing, ultrasonic testing, spectral analysis and other quality inspection projects, and third-party test reports (such as SGS, BV, TÜV) can be provided.
Applications
Oil & Gas Transmission
Used for transporting crude oil, natural gas, and refined petroleum products. High pressure and corrosion-resistant grades ensure safe operation in harsh environments.
Boiler and Heat Exchanger Systems
Widely applied in thermal power plants, chemical boilers, and industrial heat exchangers due to their ability to withstand high temperature and pressure without leakage.
Mechanical Engineering
Ideal for hydraulic cylinders, automotive components, and precision machinery shafts. The tight dimensional tolerances and strong structural integrity ensure reliable performance.
Structural and Construction Projects
Applied in steel structures, high-rise buildings, bridges, and tunnel supports for their excellent load-bearing capacity and weldability.
|
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 |
/ |
|||||
Why We Are the Leading Distributor of Seamless Steel Tube?
Reliable Product Quality
We prioritize long-term partnerships by delivering steel products with stable, traceable quality that meets international standards and client specifications.
Strong Inventory and Sales Capability
With a rolling stock capacity of over 15,000 tons and monthly sales exceeding 30,000 tons, we ensure timely supply and efficient delivery for large-scale and urgent orders.
Comprehensive One-Stop Steel Procurement Service
Leveraging our deep integration within China's specialized steel trade ecosystem, we provide sourcing, inspection, logistics, and export documentation support-streamlining procurement for global buyers.
OEM and ODM Customized Services
As a leading steel pipe stockist and distributor in China, we provide a full range of OEM and ODM solutions to meet the needs of global customers. We support specifications, materials, surface treatment, packaging and brand customization.
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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