Adinox Overseas is a name of implicit accord in international market in terms of supplying high quality Alloy 20 Fasteners that are produced following related international standards. Alloy 20 Fasteners are corrosion resistant and have the best resistance to corrosion and chemical degradation as well known. The engineering model is based on nickel-iron-chromium alloy augmented with copper and molybdenum. The design of these fasteners is to be used in an outstanding performance when the applications are exposed to sulfuric acid, nitric acid, phosphoric acid and chlorides. Having the UNS number N08020 it falls under the standard ASTM B473 and is universally known as Carpenter 20 or Alloy 20Cb-3.

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Alloy 20 fasteners see use in the chemical processing industries, pharmaceutical, food and beverage industries, petrochemicals as well as marine conditions. We at Adinox Overseas make sure that every one of our Alloy 20 Fasteners (be it a bolt, or a nut, washer, screw, or a stud) is of the highest precision engineering so as to stand up to the most straining performance requirements.

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Our fasteners have a strong reputation of having superior mechanical properties, pitting and crevice corrosion resistance, and long unparalleled durability in hostile environments. Adinox Overseas can produce ASTM B473 Alloy 20 Fasteners with high quality by using strict quality control provisions to meet international standards that suit the needs of the clients.

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We also have an extensive variety of sizes, threads, and made up shapes and we are able to satisfy crucial operations without any non-conformance. The standard name Carpenter 20 is universal and easily recognizable and traceable worldwide, whereas the ASTM B473 specification encompasses mechanical consistency and chemical integrity.

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Specifications Of Alloy 20 Fasteners

Specifications	ASTM B365 / ASME SB365
Dimensions	DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Size	Bolt / Screw Size : M3 – M56 \| 3/6″ to 2″ \| Custom Sizes Nuts Size : M3 – M56 \| 3/6″ to 2″ \| Custom Sizes Washers Size : M3 – M56 \| 3/6″ to 2″ \| Custom Sizes Machine Screws Size : M1.6 – M12 Self Tapping Screw Size : No.2 – No. 14
Length	3 mm to 200 mm
Threads	UNF, BSW, BSF, METRIC, UNC, or as required
Surface Coating	Ptfe Coating Phosphate Coating Teflon Coating Zinc Coating Hot Dipped Galvanizing Coating Cadmium Coating Xylon Coating

Chemical Composition for Alloy 20 Fasteners

Grade	C	Mn	Si	S	Cu	Ni	Cr	Fe	Mo	P
Alloy 20	0.07 max	2.00 max	1.00 max	0.035 max	3.00 – 4.00	32.00 – 38.00	19.00 – 21.00	29.85 min*	2.00 – 3.00	0.045 max

Mechanical Properties Of Alloy 20 Fasteners

Grade	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Alloy 20	8.1 g/cm3	1443 °C (2430 °F)	Psi -80,000, MPa -551	Psi - 35,000, MPa - 241	30 %

Application Of Industries

Power Plants

Aerospace

Refineries

Construction

Oil & Gas

Sugar

Chemical

Petrochemical

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