Super Duplex Steel F55 (UNS S32760)

Technical Data Sheet


Chemical Composition Limits
Weight% C Mn P S Si Cr Ni Mo N W
Super Duplex F55 0.03 max 1.00 max 0.03 max 0.01 max 1 max 24-26 4.5-6.5 3-4 0.25 0.08-0.20

F55 Duplex is the most common super duplex grade it has an enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types.

Typical Mechanical Properties


Alloy Tensile Strength N/mm² Yield Strength 0.2% N/mm² Elongation
Hardness HB
Super Duplex F55 860 720 min 16 min 270 max

Super Duplex F55 is available in Bar from 6mm dia to 270mm dia and Forging Stock.   For all stock availability contact Sales.

ASTM A182 F55
ASTM A276 F55
ASTM A479 F55
WS 1.4501
UNS S32760
NACE MR01-75
PED 97/23/EC

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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