439 stainless steel is a ferritic stainless steel containing about 18% chromium and a small amount of titanium (Ti), with excellent corrosion resistance, oxidation resistance and weldability. Its chemical composition and properties are between ordinary ferritic stainless steel (such as 430) and austenitic stainless steel (such as 304), and are suitable for a variety of corrosive environments, especially in high temperature and oxidizing environments. 439 stainless steel belt is widely used in automotive exhaust systems, home appliances, building decoration and other fields.
Chemical composition (%) of 439 Stainless Steel Strip
- Carbon (C) ≤0.03
- Silicon (Si) ≤1.00
- Manganese (Mn) ≤1.00
- Phosphorus (P) ≤0.040
- Sulfur (S) ≤0.030
- Chromium (Cr) 17.00-19.00
- Titanium (Ti) 0.10-0.60
Physical property of 439 Stainless Steel Strip
- Density: 7.75 g/cm³
- Melting point: 1425-1510°C
- Thermal expansion coefficient: 10.4 ×10^-6 /K (20-100°C)
- Thermal conductivity: 25.1 W/m·K (100°C)
- Specific heat capacity: 460 J/kg·K (20°C)
Mechanical property of 439 Stainless Steel Strip
- Tensile strength: ≥450 MPa
- Yield strength: ≥250 MPa
- Elongation: ≥20%
- Hardness: ≤200 HV
Size Specification
- The common specifications of 439 stainless steel belt are as follows:
- Thickness: 0.1mm-3.0mm
- Width: 10mm-1000mm
- Length: Can be customized according to requirements, usually in roll or plate shape
- Surface state: 2B (bright annealing after cold rolling), 2D
Enforce standards
The production and inspection of 439 stainless steel belts usually follow the following international or industry standards:
- ASTM A240: Standard for Pressure Vessels and Universal Stainless Steel sheets, sheets, and strips.
- JIS G4305: Japanese Standard for cold-rolled stainless steel sheets and strips.
- EN 10088-2: European Standard for corrosion-resistant steel sheets and strips for general use in stainless steel.
- GB/T 3280: China stainless steel cold-rolled steel sheet and strip standard.
Performance characteristics
- Corrosion resistance: The high chromium content gives it excellent corrosion resistance in oxidizing environments, especially at high temperatures.
- Oxidation resistance: It can still maintain good oxidation resistance at high temperatures, suitable for high temperature applications.
- Welding performance: Low carbon design and the addition of titanium elements make it excellent welding performance, without heat treatment after welding.
- Processing performance: easy cold processing and forming, suitable for manufacturing complex shape parts.
- Economy: Compared with austenitic stainless steel (such as 304), 439 stainless steel costs less, cost-effective.
Application field
Automotive industry:
- Exhaust system (exhaust pipe, muffler)
- Catalytic converter
- Fuel tank
Home appliance Industry:
- Washing machine barrel
- Microwave case
- Water heater liner
Construction industry:
- Roof and wall decoration materials
- Structural support
Chemical Industry:
- Corrosion resistant vessel
- Pipes and tanks
Food processing Industry:
- Food processing equipment
- Conveyor belt
Other areas:
- Heat exchanger
- Boiler component
- Agricultural equipment
439 stainless steel tape with its excellent corrosion resistance, oxidation resistance, welding performance and processing performance, widely used in automotive, home appliances, construction, chemical and food processing and other fields. Its high chromium content and the addition of titanium elements make it particularly outstanding in high temperature and oxidizing environment, and it is an economical and practical stainless steel material.
