Type 439 is a ferritic rolled coil stainless steel that is best suited for use in oxidizing environments, where excellent corrosion resistance is needed. It is often used in place of Type 409 where higher thermal conductivity is required. Type 439 also has superior formability capabilities and is heavily used in the automotive industry.
439 stainless steel coil can be used in a variety of applications. It is used primarily for automotive applications.
439 Stainless Steel Specifications:
ASTM A240 for annealed condition
ASTM A666 for tempered material*
439 Stainless Steel Applications:
Appliances
Hot water tanks, Residential Furnances
Automotive
Difficult-to-form exhaust-system components, Tubular manifolds, Mufflers
Power generation
Heat exchanger tubing
| Composition per ASTM A240 | |
| Carbon | .030 Max |
| Manganese | 1.00 Max |
| Phosphorus | .04 Max |
| Sulfur | .03 Max |
| Silicon | 1.00 Max |
| Chromium | 17.00 – 19.00 |
| Nickel | .50 Max |
| Nitrogen | .030 Max |
| Molybdenum | |
| Mechanical Properties (Annealed, Per ASTM A240) | |
| UTS | 60 KSI Min |
| Elongation % in 2″ | 22.00 Min |
| Rockwell Hardness | RB89.00 Max |
Magnetic properties:
439 flat rolled stainless steel is magnetic in all conditions.
Forming:
Type 439 has outstanding forming abilities even for difficult and unusual shapes.
