DIN 1.4438 SS Seamless Tubes
DIN 1.4438 is a standard designation for a type of stainless steel known as AISI 317L or UNS S31703.
1.4438 SS Seamless Pipe is a highly corrosion-resistant stainless steel with excellent corrosion resistance and processability. The welding process of 1.4438 Stainless Steel Seamless Pipe is relatively simple, and various welding methods such as TIG, MIG and laser can be used.
1.4438 steel pipe has good stress relaxation resistance and can maintain good stability and corrosion resistance under long-term high temperature stress. The specific chemical composition of 1.4438 SS Polished Pipe is: C: ≤ 0.030, Si: ≤ 1.00, Mn: ≤ 2.00, P: ≤ 0.045, S: ≤ 0.030, Cr: 17.00-19.00, Ni: 8.00-10.50, Mo: 2.50 -3.00.
The application of 1.4438 Stainless Steel Clad Pipe in building structures can improve the safety performance and durability of the structure and reduce subsequent maintenance costs. Mechanical properties of 1.4438: tensile strength 520 MPa, yield strength 205 MPa, elongation 40%. The diamagnetic, thermal and electrical conductivity of 1.4438 is of great value in many high-tech fields, such as medical devices, communication equipment, etc.
The corrosion resistance of 1.4438 SS oval Pipe can be further improved through the adjustment and optimization of alloy elements to meet the needs of special application scenarios. The resistance to stress corrosion cracking makes it highly valuable in brittle environments, such as low-temperature equipment manufacturing.
Stainless Steel DIN 1.4438 Tubes Equivalent Grades
| Grade | 317L | |
| UNS No | S31703 | |
| Old British | BS | – |
| En | X2CrNiMo18-15-4 | |
| Euronorm | No | 1.4438 |
| Name | – | |
| Swedish SS | – | |
| Japanese JIS | SUS 317L | |
| GOST | – | |
SS DIN 1.4438 Tubes Physical Properties
| Grade | DIN 1.4438 | |
|---|---|---|
| Density (kg/m3) | 8000 | |
| Elastic Modulus (GPa) | 193 | |
| Mean Coefficient of Thermal Expansion (m/m/0C) | 0-1000C | 15.9 |
| 0-3150C | 16.2 | |
| 0-5380C | 17.0 | |
| Thermal Conductivity (W/m.K) | at 1000C | 14.2 |
| at 5000C | 18.7 | |
| Specific Heat 0-1000C (J/kg.K) | 500 | |
| Electrical Resistivity (n.m) | 740 | |
Stainless Steel DIN 1.4438 Seamless Tubes
This kind of steel is often widely used in some special fields, such as petrochemical industry, marine engineering and pharmaceutical manufacturing. In the petrochemical industry, it can be used to manufacture containers, pipelines and equipment, and can effectively resist harsh environments such as corrosion and high temperatures. In marine engineering, 1.4438 ultra-low carbon steel is used to manufacture offshore platforms, pipelines and marine equipment to cope with corrosion and oxidation of seawater.
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