What material is 1.4460 equivalent to?

1.4460 (DIN 1.4460) is a super duplex stainless steel based upon 25% chromium content, also specified as UNS S32900, AISI 329 and EN X3CrNiMoN27-5-2.

‘Duplex’ stainless steels are a family of stainless steels that contain a mixed microstructure of austenite and ferrite phases. They offer a combination of good corrosion resistance and high strength, making them suitable for a wide range of applications.

Super duplex stainless steels have a higher content of alloying elements, such as chromium, nickel, and molybdenum, compared to duplex stainless steels. They are based upon 25% chromium content. As such, super duplex stainless steels exhibit even greater corrosion resistance and higher strength than duplex stainless steels, making them suitable for more demanding environments.

1.4460 does not offer quite the same strength or corrosion resistance as other super duplex stainless steels such as 1.4410, 1.4501 and 1.4507. It’s yield strength is typically >450MPa, compared with 550MPa (1.4410, 1.4501) and 586MPa (1.4507). It’s PREN (Pitting Resistance Equivalent Number) is around 34, whereas the PREN for other super duplex stainless steel grades is >40.

Langley Alloys carries the most complete range of duplex and super duplex stainless steels, in up to 40 different sizes, and in quantities sufficient to meet the largest of projects.

1.4507 (Ferralium 255, S32550, ASTM A182 F61) is available only from Langley Alloys, as round bar from ½”-14” (12.7-355.6mm), plate up to 3” (76.2mm), pipe, flanges and fittings.

Langley Alloys stocks 1.4410 (S32750, ASTM A182 F53) and 1.4501 (S32760, ASTM A182 F55) as round bars from 5/8”-20” diameter (15.87-508mm), plate up to 3” (76.2mm) thickness, as well as pipes in scheduled sizes, flanges and fittings.


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