APIS Machined Components specialises in Super Duplex Fasteners

Super Duplex Specialised Fasteners

APIS MC are a trusted supplier of specialised fasteners and machined components in many different material grades with Super Duplex being a grade we are particularly strong in.

APIS MC supply the following Super Duplex grades:

ASTM A276/A476 UNS S32750 which is also known as ASME A182 F53 or Wr.1.4410

ASTM A276/A476 UNS S32760 which is also known as ASME A182 F55 & Wr.1.4501 &

ASTM A240 UNS 32550 which is also known as ASME A182 F61, Wr.1.4507 or Alloy 255



What is Super Duplex?

Duplex stainless steel grades have a ferritic-austenitic microstructure, with a phase balance of approximately 50% ferrite and 50% austenite. They combine many of the advantageous properties of ferritic and austenitic stainless steels. The duplex microstructure contributes to the high mechanical strength and high resistance to stress corrosion cracking.

Other characteristics of duplex steel grades include good abrasion and erosion resistance, good fatigue resistance, high-energy absorption and low thermal expansion.

Typical applications for super duplex steels are desalination plants, seawater systems, flue-gas cleaning, umbilical’s, storage tanks, heat exchangers and pressure vessels.

APIS MC supplies Fully threaded studbolts, Hexagon Nuts, Socket Capscrews, 12pt Bolts / Screws, Plain washers, Hexagon Headed Bolts, Hexagon Headed Setscrews, Socket Grubscrews / Setscrews, Flange Head Bolts to name but a few.

We are flexible enough to supply small qty jobs from 1 off’s up to large production runs where 1000’s off are required.

APIS MC work very closely with our global mills and stockholders to ensure we obtain the best possible kilo rates and deliveries to enable APIS MC to supply our customers with the most competitive prices and lead-times available.

Our Technical Team have over 25 years experience in the production of various grades of steel and can oversee your requirements from concept to finished parts.

As part of our commitment to exceptional customer service, our regular order updates and expedite reports ensure our customers are always up to speed with order progress.

If you have requirements for Super Duplex fasteners, please Email sales@apismc.com or contact us here and we will be happy to help.