JIS G4305-2012 SUS439 439m 2b 2D Stainless Steel Coil Strip

• Type: Stainless Steel Coils
• Standard: ASTM
• Grade: 400 Series
• Model NO.: 439
• Certification: AISI
• Shape: Flat
• Technique: Cold Rolled
• Surface Treatment: Bright
• Transport Package: Wooden Pallet
• Specification: 1220*2440, 1500*3000, 1500*6000, 2000*6000mm
• Trademark: TISCO BAO STEEL
• Origin: China
• HS Code: 7219340000
• Production Capacity: 500000kgs

Product Description

The composition of 439 stainless steel has been balanced to provide a completely ferritic structure

at all temperatures, to avoid the loss of ductility after welding and to provide resistance to intergranular corrosion.

Similar ferritic stainless steels such as 430 and 434 alloys are susceptible to brittle martensite formation after welding

and to intergranular corrosion sensitivity in the as-welded condition.

439 stainless does not require annealing after welding to restore ductility or to 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 consideration

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 possibly eliminate the need for an expansion joint in the

heat exchanger. 439 stainless has a low cobalt content, compared to Type 304, making it an attractive consideration

for nuclear applications. When aplication temperatures are too high

for 409 stainless, 439 stainless provides good oxidation and corrosion resistance for many automotive exhaust

system components and residential furnace primary heat exchangers.

Chemical composition of stainless 439

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	Yiled strength	Elongation	Hardness
455	290	34	78 HB

 

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.