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The composition of 439 stainless steel has been balanced to provide a completely ferritic structure at all temperatures, ensuring no loss of ductility after welding and providing resistance to intergranular corrosion. Unlike similar ferritic stainless steels such as 430 and 434 alloys, which are susceptible to brittle martensite formation after welding and intergranular corrosion sensitivity, 439 stainless does not require annealing after welding to restore ductility or provide intergranular corrosion resistance.
Excellent resistance to stress corrosion cracking, good weldability, high thermal conductivity, and low thermal expansion characteristics make 439 stainless steel an ideal choice for many applications. For shell and tube heat exchangers where carbon steel shells are used with 439 tubes, the close match of thermal expansion coefficients may eliminate the need for an expansion joint. With low cobalt content compared to Type 304, 439 stainless is particularly attractive for nuclear applications.
When application temperatures are too high for 409 stainless, 439 stainless provides excellent oxidation and corrosion resistance for automotive exhaust system components and residential furnace primary heat exchangers.
Chemical Composition
Grade
C
Si
Mn
P
S
Cr
Ti
439
0.070
1.00
1.00
0.040
0.030
17.00~19.00
≥ 0.20+4(C+N)min - 0.50 max
Typical Annealed State Mechanical Properties
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
Hardness (HB)
455
290
34
78
Available Product Forms
Hot-rolled wide strip
Cold-rolled wide strip
Slit strip
Cut sheets
Precision strip
We stock 439 hot and cold rolled stainless steel sheet, plate, strip, and coil in various specifications.
Product Images
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
