441 & 439 Stainless Steel Welded Tubes - 17.5-18.5% Chromium, 415-620 MPa Tensile Strength for Automotive Exhaust Systems
Price:
USD 2800/TON
MOQ:
1 ton
Delivery Time:
5-8 work days
Brand:
Tisco
Product Description
441 & 439 Stainless Steel Welded Tubes
High-performance ferritic stainless steel welded tubes designed for demanding automotive exhaust and high-temperature applications. These dual-stabilized alloys provide exceptional corrosion resistance, weldability, and thermal performance.
441 Stainless Steel Characteristics
Type 441 stainless steel offers superior high-temperature strength exceeding Types 409 and 439, with corrosion resistance equivalent to Type 439 and 18 Cr-Cb stainless steels. Dual stabilization with niobium and titanium ensures excellent weld ductility and resistance to intergranular corrosion.
441 Chemical Composition
| Element | UNS 43940 | EN 1.4509 |
|---|---|---|
| Carbon | 0.030 max. | 0.030 max. |
| Manganese | 1.00 max. | 1.00 max. |
| Sulfur | 0.015 max. | 0.015 max. |
| Phosphorus | 0.040 max. | 0.040 max. |
| Silicon | 1.00 max. | 1.00 max. |
| Chromium | 17.5 - 18.5 | 17.5 - 18.5 |
| Titanium | 0.10 - 0.60 | 0.10 - 0.60 |
| Nitrogen | - | 0.045 max. |
| Niobium | 0.30+(9xC) min. | 0.30+(9xC) min. - 1.00 max. |
441 Mechanical Properties
| Type | Yield Strength (KSI) | Tensile Strength (KSI) | Elongation % | Hardness |
|---|---|---|---|---|
| UNS S43940 | 36 min. | 62 min. | 18 min. | HRB 88 max. |
| EN 1.4509 | 36 min. | 62 - 91 | 18 min. | - |
439 Stainless Steel Features
- Excellent resistance to chloride stress corrosion cracking
- Good general corrosion resistance in fresh waters and oxidizing environments
- Superior weldability with multiple welding methods
439 Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation % | Hardness HRB |
|---|---|---|---|---|
| 439 | 415 min. | 205 min. | 22 min. | 89 max. |
| TP439 | 415 min. | 205 min. | 20 min. | 90 max. |
439 Physical Properties
| Property | Value |
|---|---|
| Density | 7.70 G/Cm³ |
| Melting Point | 1505 °C |
| Thermal Expansion | 11.0 × 10⁻⁶ /K |
| Modulus of Elasticity | 220 GPa |
| Thermal Conductivity | 25.0 W/M.K |
Applications
Automotive exhaust systems, heat exchangers, tubular manifolds, residential furnaces, hot water tanks, and wheelcover applications requiring corrosion resistance and thermal stability.
Product Specifications
Available as welded tubes meeting ASTM A240 (S43940) and EN 10088-2 (1.4509) standards.
Product Images
Packaging & Shipping
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
NO.288,YOUYI ROAD ,XI SHAN DISTRICT,WUXI CITY,CHINA
Contact Person
Gao Ben