Introduction
The JIS G3441 Alloy Steel Tube cover alloy steel welded tubes mainly used in boilers and heat exchangers.
Features
High Tensile and Yield Strength
Our products are designed to withstand heavy loads and stresses in mechanical structures and pressure equipment. Typical tensile strength values range from 490 MPa to 780 MPa, depending on the grade and heat treatment process.
Excellent toughness and ductility
Enhanced impact resistance and elongation prevent cracking or brittle failure during manufacturing and operation, ensuring durability and long service life.
Heat treatment and processing flexibility
The JIS G3441 Alloy Steel Tube can be subjected to a variety of heat treatments such as normalizing, quenching and tempering, or annealing to tailor mechanical properties to specific applications.
Wide range of specifications and sizes
A wide range of outer diameters, wall thicknesses, and lengths are available to meet a variety of industrial needs. Whether it is a structural frame, hydraulic cylinder or automotive component, this product can be customized to the customer's exact specifications to support large-volume orders and special cutting requirements.
JIS G3441 Alloy steel tubes dimension
Grade: SCr420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM435TK, SCM440TK
OD: 38 - 426mm
WT: 5 - 60mm
Length: 3000-12000mm
Application: used for machinery, automobiles, and other machine parts.
Equivalent standards: ASTM A519, EN 10297-1
Alloy JIS G3441steel tube chemical composition
|
Steel Grade |
Chemical Composition % |
||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
|
SCR 420TK |
0.18~0.23 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
- |
|
SCM 415TK |
0.13~0.18 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
|
SCM 418TK |
0.16~0.21 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
|
SCM 420TK |
0.18~0.23 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
|
SCM 430TK |
0.28~0.33 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
|
SCM 435TK |
0.33~0.38 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
|
SCM 440TK |
0.38~0.43 |
0.15~0.35 |
0.60~0.85 |
0.030 max |
0.030 max |
0.90~1.20 |
0.15~0.30 |
Why Choose Us
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: 1. What is JIS G3441 Alloy Steel Tube?
A: JIS G3441 is a Japanese Industrial Standard that specifies requirements for alloy steel welded tubes used mainly in boilers, superheaters, and heat exchangers operating under high temperature and pressure.
Q: 2. What materials and grades are covered under JIS G3441?
A: The standard includes alloy steel grades such as STPA11A, STPA12A, and STPA22, which contain alloying elements like chromium and molybdenum to enhance heat and corrosion resistance.
Q: 3. Where are JIS G3441 alloy steel tubes commonly applied?
A: They are widely used in power plants, petrochemical plants, and industrial boilers for heat transfer systems requiring durability under high temperature and pressure.
Q: 4. What manufacturing process is used for JIS G3441 tubes?
A: These tubes are typically produced by electric resistance welding (ERW), ensuring precise dimensions and mechanical properties suitable for high-stress applications.
Q: 5. Are third-party inspection and certifications available for JIS G3441 tubes?
A: Yes, reputable manufacturers provide third-party inspection reports and certifications to verify chemical composition, mechanical properties, and dimensional accuracy, ensuring product quality and buyer confidence.
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