Inconel 625 Fasteners Manufacturer & Exporter in India (UNS N06625)

Ananka Fasteners manufactures and exports Inconel 625 fasteners (UNS N06625, W.Nr. 2.4856) from Mumbai, India. The range covers Inconel 625 bolts, Inconel 625 nuts, studs and threaded rods, washers and screws, supplied to ASTM F468 and F467. Alloy 625 is a nickel-chromium-molybdenum-niobium alloy. According to Special Metals, it resists pitting, crevice corrosion and chloride-ion stress-corrosion cracking, and its service temperatures range from cryogenic to 982°C (1800°F). Every order ships with an EN 10204 3.1 Mill Test Certificate. Request a quote and we will reply with price and lead time.

We manufacture Alloy 625 fasteners in the forms below. Open a product page for sizes, thread options and standards for that type.

Dimensions follow ASME B18.2.1 (hex bolts), ASME B18.3 (socket head cap screws), ASME B18.2.2 (nuts), ASME B18.31.2 (studs), ISO 4014 / ISO 4017, DIN 931 / DIN 933 (bolts), DIN 934 (nuts) and DIN 975 (threaded rod). Threads are ASME B1.1 (UNC / UNF) or ISO metric. See our standards and dimensions and weight charts for reference data. Need a part that is not listed? We also make custom fasteners to your drawing.

ASTM F468 is the fastener specification for Inconel 625 bolts, hex cap screws and studs from 0.250 to 1.500 in., plus socket head cap screws up to 1.500 in. ASTM F467 covers the matching nuts. The bar stock is specified to ASTM B446 and forgings to ASTM B564.

Working to a different standard or size range? Send your drawing and the governing specification with your enquiry. You can also review our certifications and quality standards.

Alloy 625 contains at least 58% nickel with 20 to 23% chromium, 8 to 10% molybdenum and 3.15 to 4.15% niobium (plus tantalum). Limits below are from ASTM B446, weight %.

Inconel 625 fasteners get their strength from molybdenum and niobium stiffening the nickel-chromium matrix, so no precipitation-hardening treatment is needed. The minimum room-temperature values depend on the heat-treatment condition. Grade 1 (annealed) is normally used up to 593°C (1100°F). Grade 2 (solution annealed) is used above that, where creep and rupture resistance matter. Values below are from ASTM B446.

Physical properties: density 8.44 g/cm³ (0.305 lb/in³), melting range 1290 – 1350°C (2350 – 2460°F), and modulus of elasticity 30.1 × 10³ ksi (about 208 GPa) in the annealed condition at room temperature. Tell us the condition your specification requires when you send an enquiry.

Use this grid to check that 625 is the right grade for the job. Click a grade for its dedicated page, or see the full Inconel fasteners range.

Looking for another nickel alloy? Browse our high nickel alloy fasteners, Hastelloy fasteners, Monel fasteners and Incoloy fasteners.

Inconel 625 fasteners are specified where seawater, chlorides or aggressive process media attack standard stainless steel and where the joint must also carry load. Typical sectors include:

• Marine & Offshore: Seawater equipment, mooring cable systems, propeller blades and submarine components.
• Oil & Gas and Petrochemical: Offshore and subsea bolting, flanges, valves and process equipment exposed to chlorides and corrosive media.
• Chemical Processing: Reaction vessels, heat exchangers, distillation columns and transfer piping.
• Aerospace: Ducting, engine exhaust and thrust-reverser systems.
• Nuclear: Reactor-core and control-rod components.
• Pollution Control: Scrubber and flue-gas handling equipment.

For long stud assemblies on flanges, see our stud bolts, and for matching hardware, our nuts and washers.

As a manufacturer based in Mumbai, we test Inconel 625 fasteners in-house before dispatch so that marine engineers and EPC contractors receive material they can trace.

• Ultrasonic Testing (UT): Internal flaw detection performed on raw billets prior to machining.
• Destructive Testing: In-house tensile, yield and shear testing to verify mechanical integrity under stress.
• PMI (Positive Material Identification): 100% scanning prior to dispatch to confirm molybdenum and niobium content.

What are Inconel 625 fasteners made of?

They are made from UNS N06625, a nickel-chromium-molybdenum-niobium alloy with at least 58% nickel, 20 to 23% chromium, 8 to 10% molybdenum and 3.15 to 4.15% niobium plus tantalum.

What standards cover Inconel 625 bolts and nuts?

ASTM F468 covers Inconel 625 bolts, hex cap screws, socket head cap screws and studs, and ASTM F467 covers the nuts. Bar stock is specified to ASTM B446 and forgings to ASTM B564.

What is the difference between Grade 1 and Grade 2 Inconel 625?

Grade 1 is annealed, with a minimum of 120 ksi (827 MPa) tensile and 60 ksi (414 MPa) yield for sizes up to 4 in. Grade 2 is solution annealed, with 100 ksi (690 MPa) tensile and 40 ksi (276 MPa) yield for all sizes, and is used above 593°C (1100°F) where creep and rupture resistance matter.

What is the maximum service temperature of Inconel 625?

Special Metals gives a service range from cryogenic temperatures to 982°C (1800°F). For loaded fasteners above 593°C (1100°F), ASTM B446 points to Grade 2 material.

Do you supply a Mill Test Certificate with Inconel 625 fasteners?

Yes. Every order ships with an EN 10204 3.1 Mill Test Certificate. You can see a sample on our Inconel 625 MTC page.