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Duplex Bolts

Duplex Bolts


Manufacturers & Suppliers of Duplex Steel Bolts – Duplex 2205 Bolts, UNS S31803, UNS S32205 Bolts, A182 F51, A182 F60 – Buy High Precision Duplex Hex Head Bolting’s at Best Prices!

Metline is a professional manufacturer and supplier of Duplex stainless steel bolts in size range of M6 to M80 or 1/4″ to 4″. Our key duplex bolting products include Duplex Hexagon Bolts, Duplex Threaded Bolts, Duplex U Bolts, Duplex J Bolts and Duplex Eye Bolts. We can supply metric and imperial sized Duplex bolts manufactured by both cold forged, hot forged or directly machined from high quality duplex bar stock.

  • Sizes: M4 to M80, 1/4″ to 4″ x Custom Length
  • Duplex Bolts: ANSI B18.2.1, DIN 931, DIN 933, ISO 4014, ISO 4017, BS 1768, BS1768, IFI 115
  • Duplex Nuts: ANSI B18.2.2, DIN 934, ISO 4032, BS1768, BS 1769
  • Duplex Studbolts: DIN 975, DIN 976, BS 4882, ANSI B16.5
  • Duplex Threaded Bars / Rods, Duplex Washers, and Duplex Screws
  • Other Key Products: Duplex Hexagon Bolts, Duplex Threaded Bolts, Duplex U Bolts, Duplex J Bolts, Duplex Eye Bolts, Duplex Set Screws, Duplex Socket Screws & Socket Cap Screws, Duplex Socket Countersunk Screws, Duplex Washers & Nuts

Metline Industries is India’s one of the most trusted supplier of various grades of duplex stainless steels fasteners including UNS 31803 (F51) and UNS 32205 (F60) Alloy 2205. The ratio of ferrite to austenite in Duplex stainless steel is approximately 50:50.

When compared to 2205 grade duplex stainless steel, 904L has similar corrosion resistant properties but lower mechanical strength. 2205 is also a lower cost option compared to 904L, but is not suitable for temperatures above 300°C.  Grade 2205 is not generally suitable for use at temperatures above 300°C as it suffers from precipitation of brittle micro-constituents, nor below -50°C because of its ductile-to-brittle-transition.

SKU: MET6034 Categories: ,


Designated as UNS S32205 or DIN W.Nr. 1.4462, duplex 2205 is an austenitic & ferritic dual phase Cr-Mo-Ni alloyed stainless steel which has a roughly mixed 1:1 ferrite and austenite structure. It is the most widely used duplex stainless steel grade and is characterized by high-yield strength, double that of standard austenitic stainless steel grades. UNS S31803 is a typical duplex stainless steel very similar to UNS S32205 except that it may have a bit lower content requirement of chromium, molybdenum and nitrogen. Generally, both UNS 31803 and S32205 can be called as “Duplex 2205” in practice.

Stainless Steel Duplex 2205, UNS S31803, UNS S32205, WNR 1.4462 Chemical Composition

Chemical Composition %

22.0-23.04.50-6.503.00-3.50.030 Max0.14-0.20
2.00 Max1.00 Max.030 Max.020 MaxBalance

Stainless Steel Duplex 2205, UNS S31803, UNS S32205, WNR 1.4462 Mechanical Properties

Duplex Stainless Steel
Melting Range,℃1450 ℃
Elongation %25 min.
Tensile Strength (Mpa)655
Yield Strngth (Mpa)450

Hardness (Brinell)

293 max


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