Is 2507 grade?

Is 2507 grade?

 

Grade 2507 is one of the "super duplex" grades, combining high strength with excellent corrosion resistance. 2507 is extremely resistant to general corrosion, and resists pitting and crevice corrosion in high chloride, high temperature environments. Its duplex structure also provides excellent resistance to stress corrosion cracking. Like other duplex (ferritic/austenitic) grades, super duplex grades are not suitable for high or low temperature service. 2507 is not recommended for temperatures below -50°C or above +300°C, as toughness decreases outside this range. High strength benefits applications in pressure vessels, ships and other shafts.
 

ASTM Specifications

Pipe Smls	Pipe Welded	Tube Smls	Tube Welded	Sheet/Plate	Bar	Flanges & Fittings
A790	A790	A789	A789	A240	A276	A182

 

Chemical Composition, %

Cr	Ni	Mo	C	N	Mn	Si	Cu	P	S	Fe
24.0-26.0	6.0-8.0	3.0-5.0	0.030 Max	.24-.32	1.20 Max	0.80 Max	0.50 Max	0.035 Max	0.020 Max	Balance

 

What are the characteristics of Duplex 2507?

• High resistance to chloride stress corrosion cracking
• High Strength
• Superior resistance to chloride pitting and crevice corrosion
• Good general corrosion resistance
• Suggested for applications up to 600° F
• Low rate of thermal expansion
• Combination of properties given by austenitic and ferritic structure
• Good weldability and workability