Adinox Overseas is a leading manufacturer and supplier of premium-grade Stainless Steel 347H Fasteners, engineered for applications that demand superior strength, excellent oxidation resistance, and durability under elevated temperatures. These fasteners are manufactured using the stabilized austenitic stainless steel alloy 347H, which is an enhanced carbon version of grade 347. The increased carbon content enables the material to offer improved creep resistance and high-temperature strength, making it a preferred choice for heat exchangers, high-pressure vessels, and furnace components.

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Its Stainless Steel 347H Fasteners are characterized by high strength, stability and oxidation resistance. This is why, these characteristics make them be very applicable in the aerospace, chemical processing, oil and gas, marine, and power generation industries. Niobium (columbium) added into SS 347 contributes greatly to its intergranular corrosion resistance property during exposure to temperature in the range of chromium carbide precipitation 427-816 C.

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Adinox Overseas produces extensive varieties of SS 347 Fasteners including: bolts, nuts, washers, threaded rods, studs, screws, and other specialty shapes of fasteners, to meet international standards including: ASME, DIN, ISO, BS and JIS standards. Our manufacturing processes are sophisticated and our processes of quality control are stringent to ensure that each product meets the exact technical requirements required by our customers spread in different parts of the world.

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The ASTM A193 B8 Class 2 Fasteners are specially strain-hardened to boost the tensile strength and are recommended in pressure vessels, heat exchangers and piping systems which have to work under extreme heat and corrosive conditions. These strongly performing fasteners are known to work in harsh applications whose temperatures can be as high as 1000degrees (F) (538degrees (C)) without losing their mechanical integrity, or in the process acquiring loss of corrosion resistance.

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Specifications Of Stainless Steel 347H Fasteners

Specifications	ASTM A193, A194, F593, F594, F1554 / ASME SA193, SA194, SF593, F594, F1554
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 Stainless Steel 347H Fasteners

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N
SS 347	0.08 max	2 max	0.75 max	0.045 max	0.030 max	18 – 20	-	8 – 11	-

Mechanical Properties Of Stainless Steel 347H Fasteners

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1400 °C (2550 °F)	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	35 %

Application Of Industries

Power Plants

Aerospace

Refineries

Construction

Oil & Gas

Sugar

Chemical

Petrochemical

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