Introduction

Inconel 625 (UNS N06625 / Alloy 625) is a nickel‑chromium‑molybdenum alloy with excellent corrosion resistance and high strength from cryogenic to 980°C. Inconel 625 round bar, sheet, plate, strip, wire, seamless tube, pipe, forging, and fastener are widely used in marine, chemical processing, aerospace, and nuclear industries. Alloy 625 heat exchanger tube and welding wire provide reliable performance in aggressive environments, including seawater, acids, and sour gas. Available in cold rolled sheet, hot rolled bar, spring wire, flange, and fitting.

Chemical components 

Mechanical properties

Physical properties

Inconel 625 (UNS N06625) – Available Products and Standard

1. GB/T 15007 (Nickel and Nickel Alloy Plate, Strip, and Foil)

Domestic Grade: NS3306 (GB/T 15007) / Inconel 625 equivalent

Type: Sheet / Plate / Strip / Wire / Tube / Bar

Size Range:

Wire: 0.1 – 15.0 mm dia

Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide

Round Bar: 8 – 355 mm dia

Sheet / Plate: 0.5 – 180 mm thick

Seamless Tube / Pipe: Custom sizes available

Surface: Annealed, Bright, Pickled, Ground

Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, intergranular corrosion test, dimensional inspection

2. ASTM B443 (Standard Specification for Nickel-Chromium-Molybdenum Alloy Plate, Sheet, and Strip)

Grade: UNS N06625 / Inconel 625 / Alloy 625

Type: Sheet / Plate / Strip

Size Range:

Sheet / Plate: 0.5 – 180 mm thick (hot rolled or cold rolled)

Strip: 0.05 – 5.0 mm thick × up to 500 mm wide (coils)

Surface: Annealed, Pickled, Bright, Polished

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, intergranular corrosion test, pitting corrosion test, dimensional inspection

3. ASTM B444 (Standard Specification for Nickel-Chromium-Molybdenum Alloy Seamless Pipe and Tube)

Grade: UNS N06625 / Inconel 625 / Alloy 625

Type: Seamless Pipe / Seamless Tube

Size Range:

Seamless Pipe: 6 – 610 mm OD × 1 – 50 mm wall thickness

Seamless Tube: Custom sizes

Surface: Annealed, Pickled, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hydrostatic test, eddy current test, dimensional inspection

4. ASTM B446 (Standard Specification for Nickel-Chromium-Molybdenum Alloy Rod and Bar)

Grade: UNS N06625 / Inconel 625 / Alloy 625

Type: Round Bar / Rod / Wire

Size Range:

Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)

Wire: 0.1 – 15.0 mm dia (coils or straight)

Surface: Annealed, Pickled, Ground, Turned, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, ultrasonic test, dimensional inspection

Advantages

(1) High strength from cryogenic to 980°C – Inconel 625 round bar and forging maintain excellent mechanical properties across a wide temperature range, ideal for aerospace and nuclear components.

(2) Outstanding corrosion resistance – Alloy 625 seamless tube and sheet resist pitting, crevice corrosion, and stress corrosion cracking in seawater, acids, and sour gas environments.

(3) Good weldability – Inconel 625 welding wire and filler rod provide strong, reliable joints for complex chemical reactors and heat exchangers.

(4) Excellent fatigue and oxidation resistance – N06625 plate and strip offer long service life in cyclic thermal and mechanical loading conditions.

(5) Versatile product forms – Inconel 625 spring wire, fastener, flange, fitting, and heat exchanger tube are available for marine, offshore, and flue gas desulfurization applications.

Applications

(1)Marine engineering – Inconel 625 seamless pipe and fastener are widely used in seawater piping, propeller shafts, and offshore platform components.

(2)Chemical processing – Alloy 625 heat exchanger tube and fitting handle aggressive media such as sulfuric acid, hydrochloric acid, and chlorine dioxide.

(3)Aerospace industry – Inconel 625 round bar and sheet serve in exhaust systems, turbine shrouds, and thrust reverser components.

(4)Nuclear reactors – N06625 forging and plate are specified for reactor core internals, control rod mechanisms, and steam generator tubing.

(5)Flue gas desulfurization (FGD) – Inconel 625 strip and welding wire are used in scrubber nozzles, ductwork, and stack liners for pollution control.

(6)Oil and gas – Alloy 625 seamless tube and flange resist sour gas (H₂S/CO₂) and chloride attack in downhole tubing and wellhead equipment.

MONO Group is one of Superalloy, Nickel alloy, high Temperature alloy manufacturer&Supplier&Wholesaler from China,We can supply high quality alloy plate,sheet,round bar,tube.pipes,fittings,flange,and custom parts in accordance with ASTM, ASME, DIN, ISO, GB, and other international standards. For inquiries or to request a quote , please freely contact us at info@monokj.com.