Incoloy 925 Round Bar | ASTM B805 / ASME SB805
ISO Certified | MTC Available | Third-Party Tested | 25+ Countries Served
Incoloy 925 Round Bar is the alloy that engineers depend on when they are working with applications in sour gas, deep-sea subsea systems, or in high-pressure chemical environments where they cannot afford to be let down by any alloy. Manufactured and supplied by Unifit Fastener to meet the requirements of ASTM B805 and ASME SB805, our UNS N09925 bars provide your procurement department and project engineer with the confidence of certified, traceable and performance proven material. Incoloy 925 is a precipitation-hardenable nickel-iron-chromium alloy that provides very high chloride stress-corrosion cracking resistance, high tensile strength and good performance in conditions where conventional stainless steels and lower-grade nickel alloys can fail. We have a manufacturing plant in Mumbai and keep stock in round bars ranging from 10mm to 300mm diameter, cold drawn, hot rolled and forged all in the range and odd size can be machined as per the customer's requirement. From oil & gas down hole tools to chemical processing valves, marine fasteners to aerospace structural components, We provide competitive pricing, shorter lead time and complete documentation with Mill Test Certificates to clients all over India, UAE, Saudi Arabia & beyond.
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What is Incoloy 925 Round Bar?
Incoloy 925 Round Bar, also known as Alloy 925 round bar or UNS N09925 Bar, is a precipitation-hardenable nickel-iron-chromium alloy bar with deliberate additions of molybdenum, copper, titanium, and aluminum. These alloying elements work in concert to deliver a unique combination of:
- Superior resistance to chloride-ion stress-corrosion cracking (SCC)
- High tensile strength and hardness achieved through age-hardening heat treatment
- Outstanding resistance to sulfide stress cracking - critical in H2S sour service (NACE MR0175 compliant)
- Excellent corrosion resistance in seawater, brines, and acidic media
- Stable mechanical properties across a broad temperature range from cryogenic to approximately 538°C
The alloy's strengthening mechanism relies on the precipitation of gamma prime intermetallic phases within the nickel-rich matrix during controlled heat treatment. This internal microstructural change is what gives Incoloy 925 its edge over standard austenitic alloys in critical, life-of-field applications.
Manufacturing Routes
Hot-Finished Bars: Produced by hot-working rods at elevated temperatures, offering larger diameters and a scale surface. Ideal for forged components and heavy structural applications.
Cold-Finished Bars: Formed at ambient temperature via drawing or extrusion, delivering superior dimensional accuracy, better surface finish, and enhanced mechanical properties over hot-finished bars.
Specifications of Incoloy 925 Round Bar
| Specification Attribute | Details |
|---|---|
| Primary Standard | ASTM B805 / ASME SB805 |
| UNS Number | N09925 |
| Equivalent Standards | AMS 5566, DIN 17744, ISO 9723, BS 3076 |
| Diameter Range (Round Bar) | 10mm to 300mm (OD: 10mm to 1000mm available on request) |
| Flat Bar Thickness | 2mm to 100mm |
| Flat Bar Width | 10mm to 500mm |
| Hex Bar (A/F) | 2mm to 100mm A/F |
| Square Bar | 10x10mm to 100x100mm |
| Billet Size | 1/2" to 495mm Diameter |
| Length | 1m to 6m, or cut-to-length as per requirement |
| Finish | Bright, Polished, Black, Hot Rolled, Cold Drawn, Forged Black, Proof Machined, Centreless Ground |
| Condition / Supply State | Hardened & Tempered, Annealed, Solution Annealed, Precipitation Hardened, Turned & Rough |
| Technique | Cold Drawn, Hot Rolled, Forged Round Bars |
| Forms Available | Round, Hexagonal, Square, Flat, Rectangular, Hollow, Threaded, Billet, Block |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or per client requirements |
Chemical Composition of Incoloy 925 Round Bar (UNS N09925)
| Grade | Ni% | Cr% | Fe% | Mo% | Cu% | Ti% | Al% | C% | S% |
|---|---|---|---|---|---|---|---|---|---|
| Incoloy 925 | 42-46 | 19.5-22.5 | 22 min | 2.5-3.5 | 1.5-3.0 | 1.9-2.4 | 0.1-0.5 | 0.03 max | 0.03 max |
Note: Silicon (Si) max 0.50%, Manganese (Mn) max 1.0%. All values in weight %. Composition verified by PMI Testing, Chemical Testing, and third-party spectroscopy at Unifit Fastener.
Mechanical Properties of Incoloy 925 Round Bar
| Property | Value (Typical) |
|---|---|
| Density | 8.14 g/cm3 |
| Melting Point | 1343°C (2450°F) |
| Tensile Strength | 1240 MPa (180 ksi) min |
| Yield Strength (0.2%) | 827 MPa (120 ksi) min |
| Elongation | 20% min |
| Property | Value | Unit |
|---|---|---|
| Hardness (Typical) | 38 HRC / 80-95 HRB | - |
| Modulus of Elasticity | 207 GPa | 30 x 106 psi |
| Poisson's Ratio | 0.31 | - |
| Thermal Conductivity | 12.0 W/m.K | at 100°C |
| Electrical Resistivity | 1.02 micro ohm-cm | at 20°C |
| Thermal Expansion Coeff. | 13.5 microm/m°C | 20-100°C |
| Specific Heat Capacity | 0.43 J/g.K | - |
Incoloy 925 Forged Bar Temperature Range
| Property | Temperature Range |
|---|---|
| Operating Temperature | -200°C to 980°C (-328°F to 1800°F) |
| High-Temperature Strength | Up to 980°C (1800°F) |
| Low-Temperature Impact | -200°C (-328°F) to 0°C (32°F) |
| Maximum Continuous Service Temperature | 1000°C (1832°F) |
Dimensional Tolerance Chart (Alloy 925 Round Bar)
| Dimension (mm) | Thickness Tolerance (mm) | Width Tolerance (mm) | Length Tolerance (mm) |
|---|---|---|---|
| Up to 25 | +/-0.10 | +/-0.15 | +/-5 |
| 25 to 50 | +/-0.15 | +/-0.20 | +/-5 |
| 50 to 100 | +/-0.20 | +/-0.25 | +/-6 |
| 100 to 150 | +/-0.25 | +/-0.30 | +/-7 |
| 150 to 200 | +/-0.30 | +/-0.40 | +/-7 |
| 200 to 300 | +/-0.40 | +/-0.50 | +/-8 |
| 300 and above | +/-0.50 | +/-0.60 | +/-10 |
Incoloy 925 Square Bar Dimensions Chart
| Square Bar Size (mm) | Across Flats (mm) | Cross-Sectional Area (mm2) | Standard Length (m) | Available Finish |
|---|---|---|---|---|
| 10 x 10 | 10 | 100 | 3 / 4 / 6 | Bright, Black |
| 12 x 12 | 12 | 144 | 3 / 4 / 6 | Bright, Black |
| 16 x 16 | 16 | 256 | 3 / 4 / 6 | Bright, Peeled |
| 20 x 20 | 20 | 400 | 3 / 4 / 6 | Bright, Black |
| 25 x 25 | 25 | 625 | 3 / 4 / 6 | Bright, Peeled |
| 32 x 32 | 32 | 1,024 | 3 / 4 / 6 | Bright, Black |
| 40 x 40 | 40 | 1,600 | 3 / 4 / 6 | Bright, Ground |
| 50 x 50 | 50 | 2,500 | 3 / 4 / 6 | Bright, Ground |
| 65 x 65 | 65 | 4,225 | 3 / 4 / 6 | Bright, Ground |
| 80 x 80 | 80 | 6,400 | 3 / 4 / 6 | Bright, Polished |
| 100 x 100 | 100 | 10,000 | 3 / 4 / 6 | Bright, Polished |
Incoloy 925 Flat Bar Size & Weight Chart
| Width x Thickness (mm) | Approx. Weight (kg/m) | Approx. Weight (lbs/ft) | Cross-Section Area (mm2) | Standard Length (m) |
|---|---|---|---|---|
| 20 x 3 | 0.48 | 0.32 | 60 | 3 / 6 |
| 25 x 3 | 0.60 | 0.40 | 75 | 3 / 6 |
| 25 x 5 | 1.00 | 0.67 | 125 | 3 / 6 |
| 30 x 5 | 1.20 | 0.81 | 150 | 3 / 6 |
| 40 x 5 | 1.60 | 1.08 | 200 | 3 / 6 |
| 50 x 5 | 2.00 | 1.35 | 250 | 3 / 6 |
| 50 x 6 | 2.40 | 1.62 | 300 | 3 / 6 |
| 65 x 6 | 3.12 | 2.11 | 390 | 3 / 6 |
| 75 x 8 | 4.80 | 3.24 | 600 | 3 / 6 |
| 100 x 10 | 8.00 | 5.40 | 1,000 | 3 / 6 |
| 125 x 12 | 12.00 | 8.10 | 1,500 | 3 / 6 |
Industrial Applications of Incoloy 925 Round Bar
| Industry | Key Applications |
|---|---|
| Oil & Gas | Downhole hangers, packers, valve stems, tool joints, subsea connectors, surface wellheads, sour gas (H2S) components, NACE MR0175 compliant fasteners |
| Chemical Processing | Valves, fittings, pump shafts, agitator components, piping systems handling corrosive acids, chloride-rich media and brines |
| Power Generation | Heat exchanger tubing supports, condensers, turbine fasteners, nuclear plant structural components |
| Aerospace | High-strength structural fasteners, aircraft engine components, landing gear parts requiring high strength-to-weight performance |
| Marine & Shipbuilding | Propeller shafts, sea water-cooled equipment, offshore platform bolting, marine riser systems |
| Pharmaceuticals | Reactor vessels, filtration equipment components, fittings in sterile and corrosive pharmaceutical processes |
| Pulp & Paper | Bleach plant equipment, digesters, washer shafts, and components exposed to corrosive chlorine-based chemicals |
| Heat Treatment Furnaces | Fixtures, retorts, baskets, and bar stock requiring resistance to oxidizing and carburizing atmospheres |
Incoloy 925 vs Inconel 625 - Side-by-Side Comparison
| Property | Incoloy 925 Round Bar | Inconel 625 Round Bar |
|---|---|---|
| UNS Number | N09925 | N06625 |
| Primary Alloy Type | Ni-Fe-Cr (Precipitation Hardenable) | Ni-Cr-Mo (Solid Solution Strengthened) |
| Tensile Strength | 586-756 MPa (typical) | 552-724 MPa (typical) |
| Yield Strength | 241-379 MPa | 345-517 MPa |
| Max. Temperature | 538°C continuous | 982°C continuous |
| Corrosion Resistance | Chloride SCC resistant, H2S sour service | Oxidation, carburization, pitting resistant |
| Hardening Method | Age / Precipitation Hardening | Work Hardening (solid solution) |
| Common Applications | Oil & Gas downhole, aerospace fasteners, chemical valves | Aerospace, nuclear, marine, cryogenic |
| Relative Cost | Lower - cost-effective for oil & gas budgets | Higher - justified for extreme temperature service |
Verdict: Choose Incoloy 925 when your application demands maximum resistance to chloride stress-corrosion cracking and sour gas at moderate temperatures. Choose Inconel 625 when continuous service above 538°C or extreme oxidation resistance is the primary requirement.
Incoloy 925 Equivalent Grades & Standards
| Standard Body | Designation | Equivalent Grade |
|---|---|---|
| ASTM / ASME | ASTM B805 / ASME SB805 | UNS N09925 |
| AMS | AMS 5566 | - |
| ISO | ISO 9723 / ISO 5832-9 | NiCr22Mo6Cu |
| DIN / EN | DIN 17744 | NiCr21Mo6Cu |
| BS | BS 3076 | NA 24 |
| Common Trade Names | Incoloy 925, Inconel 925, Alloy 925 | UNS N09925 |
Quality, Testing & Certifications at Unifit Fastener
Every Incoloy 925 Round Bar shipped from Unifit Fastener undergoes a rigorous multi-stage quality assurance protocol, ensuring compliance with ASTM B805 and client-specific requirements:
| Test / Certification | Description |
|---|---|
| Chemical Testing (PMI) | Positive Material Identification via XRF Spectrometer to verify full composition |
| Mechanical Testing | Tensile, yield, hardness, and elongation testing per ASTM standards |
| Ultrasonic Testing (UT) | Detection of internal voids, cracks, or laminations in forged bars |
| Liquid Penetrant Testing (LPT) | Surface crack detection on machined or cold-drawn bars |
| 100% Radiography Test | Available on request for critical pressure-containing components |
| Mill Test Certificate (MTC) | EN 10204 3.1 and 3.2 certificates available; full chemical & mechanical traceability |
| Third-Party Inspection | TPIA (SGS, Bureau Veritas, Lloyds) available on customer request |
| Raw Materials Certificate | Original mill traceability documents supplied with each batch |
Alloy 925 Round Bar Price List (Indicative)
Note: Prices are indicative and vary based on quantity, size, finish, and LME nickel rates. Contact Unifit Fastener for an exact, competitive quotation.
| Product Description | Price (INR Approx.) | Price (USD Approx.) |
|---|---|---|
| Incoloy 925 Round Bar (per kg) | INR 1,230-INR 2,100 | $14.80-$25.20 |
| Incoloy 925 Square Bar (per kg) | INR 1,600-INR 2,500 | $19.20-$30.00 |
| Incoloy 925 Hex Bar / Rod 10mm x 2000mm | INR 2,100-INR 3,000 | $25.20-$36.00 |
| ASTM B805 UNS N09925 Flat Bar (per kg) | INR 1,800-INR 2,800 | $21.60-$33.60 |
| Alloy 925 Cold Drawn Round Bar | INR 1,700-INR 2,600 | $20.40-$31.20 |
Export Delivery Schedule - Alloy 925 Round Bar
| Destination | Estimated Delivery Time |
|---|---|
| UAE / Dubai | 5-7 business days |
| Saudi Arabia / Qatar | 7-10 business days |
| UK / France / Italy | 25-30 business days |
| USA (East/West Coast) | 35-45 business days |
| Malaysia / Singapore | 8-10 business days |
| Indonesia / Philippines | 9-14 business days |
| Bahrain / Oman / Kuwait | 7-9 business days |
| South Africa | 22-28 business days |
Export charges: 5% additional on standard pricing. All exports handled with complete shipping documentation: COO, BOL, packing list, Invoice, MTC.
FAQs - Alloy 925 Round Bar
Incoloy 925 is a precipitation-hardenable nickel-iron-chromium alloy best suited for sour gas, chloride SCC environments, and moderate temperatures (up to 538°C). Inconel 625 is a solid-solution-strengthened nickel-chromium-molybdenum alloy designed for extreme temperature service (up to 982°C), oxidation resistance, and cryogenic applications. Incoloy 925 is more cost-effective; Inconel 625 is preferred for higher-temperature and marine corrosion scenarios.
Incoloy 925 Round Bar conforms to ASTM B805 and ASME SB805. It is also covered under AMS 5566, ISO 9723, DIN 17744, and BS 3076. The UNS designation is N09925. Unifit Fastener supplies bars with full MTC traceability to ASTM standards.
The price of Incoloy 925 Round Bar in India typically ranges from INR 1,230 to INR 2,500 per kg depending on the diameter, form (round, hex, square, flat), finish, and order quantity. Prices fluctuate with global nickel LME rates. Contact Unifit Fastener for an up-to-date quotation with bulk order discounts.
Unifit Fastener offers age hardening, heat treatment (Q&T), soft/solution annealing, normalizing, coating, boring, proof machining, centreless grinding, and custom cut-to-length services. Bars can be supplied in hexagonal, square, flat, rectangular, hollow, and threaded forms as per drawing.