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Quick Navigation: Inconel 625 Plate | Inconel 625 Sheet | Inconel 625 Strip | Inconel 625 Wire | Inconel 625 Tube & Pipe | Inconel 625 Bar | Inconel 625 Fittings & Flanges
Inconel 625 Alloy (UNS N06625) is a nickel-chromium-molybdenum-columbium (niobium) alloy that delivers exceptional strength without age-hardening treatments, due to the solid solution effects of molybdenum and columbium. This high strength Inconel 625 contains a minimum of 58% nickel, 20–23% chromium, 8–10% molybdenum, and 3.15–4.15% niobium, providing corrosion resistant Alloy 625 performance across an exceptionally wide range of severely corrosive environments—with particular resistance to pitting, crevice corrosion, and chloride-ion stress-corrosion cracking.
The nickel superalloy maintains high strength from cryogenic temperatures up to 1800°F (980°C) and offers good oxidation resistance, making it the preferred material for aerospace, oil and gas, chemical processing, marine engineering, offshore equipment, heat exchangers, power generation, and nuclear industry applications.Available in Inconel 625 products with different shape, as plate, sheet, seamless pipe, tube, bar,round bar, wire,fittings, flanges, and forgings, the production method include hot rolled, cold rolled, cold drawn, annealed, and solution annealed conditions.
The following table shows the Inconel 625 chemical composition and elemental limits for this UNS N06625 nickel alloy per ASTM B443 plate specification, ASTM B444 seamless pipe standard, and ASTM B446 rod and bar specification
| Composition (%) | C | Si | Mn | P | S | Cr | Ni | Mo | Al | Fe | Ti | Nb | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | — | — | — | — | — | 20.0 | 58.0 | 8.0 | — | — | — | 3.15 | — |
| Max | 0.10 | 0.50 | 0.50 | 0.015 | 0.015 | 23.0 | — | 10.0 | 0.40 | 5.0 | 0.40 | 4.15 | 0.07 |
| Hardness | Tensile Strength | Yield Strength | Elongation |
| 95-120 HRB | ≥ 830 MPa | ≥ 415 MPa | ≥ 30% |
Physical Properties
| Density | Melting Point | Specific Heat | Magnetism | Resistivity | Thermal Conductivity | Linear Expansivity |
|---|---|---|---|---|---|---|
| 8.44 g/cm³ | 1290-1350°C | 430 J/(kg·°C) | Non-magnetic | 1.28 μΩ·m (20°C) | 12.1 W/(m·K) (100°C) | 12.3×10⁻⁶/K (20-100°C) |
Grade: UNS N06625 / Inconel 625 / Alloy 625
Type: Sheet / Plate / Strip
Size Range:
• Inconel 625 Sheet / Plate: 0.5 – 180 mm thick (hot rolled or cold rolled),Like Inconel 625 plate 3mm,Inconel 625 plate 6mm and other thickness.
• Inconel 625 Strip: 0.05 – 5.0 mm thick × up to 500 mm wide (coils)
Inconel 625 plate and sheet Normal using thickness for customer :3mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm
Surface: Annealed, Pickled, Bright, Polished
Testing: Chemical analysis, mechanical test, hardness test, intergranular corrosion test, pitting corrosion test, dimensional inspection
Grade: UNS N06625 / Inconel 625 / Alloy 625
Type: Seamless Pipe / Seamless Tube
We can supply Size Range:
• Inconel 625 Seamless Pipe:Out diameter: 6mm to 610 mm,wall thickness:1mm to 50 mm wall thickness
• Inconel 625 Seamless Tube: Custom sizes available
Surface: Annealed, Pickled, Bright
Testing: Chemical analysis, mechanical test, hydrostatic test, eddy current test, dimensional inspection
Grade: UNS N06625 / Inconel 625 / Alloy 625
Type: Round Bar / Rod / Wire
Size Range:
• Inconel 625 Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)
• Inconel 625 Wire: 0.1 – 15.0 mm dia (coils or straight)
Surface: Annealed, Pickled, Ground, Turned, Bright
Testing: Chemical analysis, mechanical test, hardness test, ultrasonic test, dimensional inspection
For aircraft engine components, exhaust systems, and turbine shrouds, Inconel 625 for aerospace delivers high strength at temperatures up to 980°C (1800°F) with excellent oxidation resistance.
For aircraft ducting systems and combustion chamber parts, Alloy 625 seamless pipe and UNS N06625 tube provide reliable performance under extreme thermal and mechanical loads.
For sour gas service (H₂S/CO₂ environments), Inconel 625 for oil and gas is specified for downhole tools, wellhead equipment, and subsea pipelines. NACE MR0175 certified.
For offshore platforms and subsea manifolds, Inconel 625 for offshore equipment withstands seawater corrosion and chloride attack.
For seawater cooling systems and propeller shafts, Inconel 625 for marine engineering resists pitting and crevice corrosion in warm, high-chloride environments.
This seawater resistant Inconel 625 is immune to chloride-ion stress-corrosion cracking.
For reactors, distillation columns, and heat exchangers handling sulfuric acid, hydrochloric acid, and nitric acid, Inconel 625 for chemical processing provides broad resistance to both reducing and oxidizing environments.
For heat exchangers, condenser tubing, and reboiler bundles, Inconel 625 tube combines high strength with outstanding resistance to localized attack.
For gas turbine components and industrial furnaces, Inconel 625 alloy retains mechanical strength at elevated temperatures with excellent oxidation resistance.
For nuclear reactor components, UNS N06625 seamless pipe provides the corrosion resistance and radiation stability required for demanding nuclear environments.
For flue gas desulfurization scrubbers and stack-gas reheaters, Alloy 625 plate withstands low-pH, high-chloride environments.
For bubble caps, transfer piping, valves, and reaction vessels, Inconel 625 fittings and flanges provide reliable service.
Pitting Corrosion: Critical pitting temperature (CPT) in 3.5% NaCl: 85°C+
Crevice Corrosion: Critical crevice temperature (CCT) in 3.5% NaCl: 40°C+
Stress Corrosion Cracking: Immune to chloride-ion SCC
Sulfuric Acid: Excellent resistance (up to 80°C, all concentrations)
Hydrochloric Acid: Good resistance (dilute solutions)
Seawater: Excellent — no pitting or crevice attack
Inconel 625 is known as the "most weldable high-strength nickel alloy." It can be welded using TIG, MIG, SMAW, and other standard processes with ERNiCrMo-3 filler wire. Typically requires no preheat or post-weld heat treatment. For thicker sections, PWHT at 925°C (1700°F) followed by air cooling may be recommended.
Q: What is the difference between Inconel 625 and Hastelloy C276?
A: Inconel 625 and Hastelloy C276 material are nickel-based alloys with excellent superalloy material, but they are designed for different work conditions. Inconel 625 offers good strength plus resistance to seawater, oxidation, and high-temperature environments, these features making Inconel 625 oil and gas applications and Inconel 625 for Heat exchanger. Hastelloy C276 provides excellent resistance to severe chemical corrosion, particularly in wet chlorine, acids, and other chemical media, making Hastelloy C276 plate and Hastelloy C276 tube widely used in chemical processing equipment.
Q: What are the ASTM standards for Inconel 625?
A:ASTM B443 for plate specification, ASTM B444 for seamless pipe standard, and ASTM B446 for rod and bar specification
Q: What products are available in Inconel 625?
A: There have different shape for Inconel 625 material. Inconel 625 Plate, Inconel 625 Sheet, Inconel 625 Bar & Round Bar, Inconel 625 Pipe & Tube, Inconel 625 Wire, Inconel 625 Fittings & Flanges or other customized size.
Q: Can Inconel 625 be welded without post-weld heat treatment?
A: Yes. Inconel 625 seamless pipe and other forms can be welded using standard processes. Typically no preheat or PWHT is required, making it ideal for field welding applications.
Q: What is the maximum operating temperature for Inconel 625 alloy?
A: Inconel 625 alloy operates from cryogenic temperatures (-196°C / -320°F) up to 980°C (1800°F) in continuous service. Short-term exposure up to 1200°C (2190°F) is possible.
Q: What is the price of Inconel 625 per kg?
A: Inconel 625 price varies by product form, size, and quantity. Typical ranges:
• Inconel 625 plate: $25-55/kg
• Inconel 625 bar: $30-60/kg
• Inconel 625 seamless pipe: $35-70/kg
Contact us for accurate pricing based on your specific requirements.
Q: Inconel 625 Delivery & Lead Time?
A: Mono group have most of Inconel 625 round bar stock,and normal size items: 3-7 days,Custom cut-to-size: 7-14 days, Non-standard sizes: 15-30 days, Large quantity orders: 30-45 days.
Q: What Inconel 625 Quality Certification could supply before shiping?
A: We will provide Mill Test Certificate (MTC) as per EN 10204 3.1/3.2 include Inconel 625 Physical Properties,Tensile strength, hardness, impact etc, If customer have special request for Third-party inspection(TPI): We will assist for SGS, BV, TUV, DNV, NDT testing,
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MONO Group specializes is Inconel 625 ISO certified supplier and a comprehensive portfolio of nickel-chromium-based superalloys for aerospace, marine, chemical, and nuclear applications. As a China-based inconel 625 distributor, we offer different shape superlloy material and custom-machined parts — all produced in accordance with ASTM B443 for UNS N06625 Plate, Sheet & Strip, ASTM B446 for incnoel 625 Rod & Bar,ASTM B444 for Seamless Pipe and Tube specifications. We also provide cut-to-size, precision machining, and surface finishing services.
