Inconel Round Bar Supplier in India
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Aashish Metals manufactures and supplies Inconel Bars, Rods and Wires in high-performance nickel alloy grades including Inconel 600, Inconel 625 and Inconel 718, along with Incoloy 800 and Incoloy 825. These nickel-based alloys are selected for applications requiring high-temperature strength, oxidation resistance and reliable performance in corrosive environments.
Inconel materials maintain their mechanical properties across elevated temperatures and develop a protective oxide layer that helps reduce surface degradation in demanding service conditions. Our Inconel and Incoloy Round Bars, Rods and Wires are available in different diameters, lengths, finishes and specifications to meet industrial and project requirements.
We supply these products according to applicable ASTM, ASME, DIN, EN and other international standards, depending on the grade and product form. Custom sizes and cut lengths can also be provided based on customer drawings or specifications. Inconel bars, rods and wires are widely used in chemical processing, petrochemical, power generation, aerospace, marine, heat-treatment and high-temperature industrial applications.
Inconel Round Bar Grades
Search for Inconel bar and you will see alloy numbers, UNS codes and German numbers used interchangeably. They all describe the same materials.
| You may see | It means | UNS | Werkstoff (W.Nr.) |
|---|---|---|---|
| Inconel 600, alloy 600 round bar, alloy 600 bar, inconel 600 bar, inconel 600 rod | Nickel-chromium-iron, oxidation and caustic resistant | N06600 | 2.4816 |
| Inconel 601, alloy 601 round bar, alloy 601 bar, inconel 601 bar, inconel 601 rod | 600 with added aluminium for scale resistance | N06601 | 2.4851 |
| Inconel 625, alloy 625, 625 round bar | Nickel-chromium-molybdenum-niobium, corrosion resistant | N06625 | 2.4856 |
| Inconel 718, alloy 718 round bar, alloy 718 bar, inconel 718 bars, 718 round bar, 718 inconel round bar | Precipitation-hardened, highest strength of the family | N07718 | 2.4668 |
| Inconel X750, x750 bar | Precipitation-hardened, spring and relaxation resistance | N07750 | 2.4669 |
| “Inconel 825” | Really Incoloy 825, an iron-nickel-chromium alloy; see below | N08825 | 2.4858 |
Inconel 625 round bar (UNS N06625)
Alloy 625 gets its strength from molybdenum and niobium in solid solution, not from ageing, so it stays tough and weldable. It resists pitting, crevice attack and chloride cracking, which is why alloy 625 round bar is the usual pick for seawater, offshore, flue-gas and chemical service. It is the most searched grade in our list, and for good reason: it balances strength, corrosion resistance and fabrication better than any other grade in the family.
Inconel 718 round bar (UNS N07718)
When strength is the priority, alloy 718 bar is the answer. It is precipitation-hardened, so after solution treatment and double ageing an inconel 718 rod reaches about 1,240 MPa tensile, far above 625. It performs well to about 650–700 °C and is used for turbine parts, oil-field tools, aerospace fasteners and sour-service hardware. It can be supplied solution-treated (softer, easier to machine) or aged, and the condition should always be stated on the order.
Inconel 600 round bar (UNS N06600)
Alloy 600 resists oxidation to very high temperatures, is immune to chloride stress-corrosion cracking and copes with caustic and many reducing media. It is a solid-solution alloy with moderate strength, and cannot be hardened by heat treatment. Typical uses include furnace parts, heat-treatment fixtures, nuclear and chemical equipment.
Inconel 601 round bar (UNS N06601)
The added aluminium in alloy 601 gives outstanding scaling resistance to about 1,150 °C. Choose it for burners, radiant tubes, muffles and furnace hardware.
Inconel X750 round bar (UNS N07750)
X750 is a precipitation-hardened alloy prized for high strength combined with good relaxation resistance, so it is often used for springs, bolts, turbine blades and gas-turbine hardware. If your enquiry is for Inconel X750 bar stock or an x750 bar, tell us the specification and heat-treatment condition. Availability depends on stock [confirm].
Inconel 825 round bar
Many buyers type “inconel 825 round bar”, but 825 is an Incoloy alloy. It is excellent in sulphuric and phosphoric acid service. If that is what you need, see our Incoloy 825 round bars and Incoloy 800/800H/800HT round bars.
| Property / use | 600 | 601 | 625 | 718 | X750 |
|---|---|---|---|---|---|
| Strengthening | Solid solution | Solid solution | Solid solution (Mo, Nb) | Precipitation hardened | Precipitation hardened |
| Best for | Oxidation, caustic, chloride SCC | Extreme oxidation and scaling | Seawater, chlorides, fatigue, weldability | Highest strength, turbines, oil & gas | High strength with relaxation resistance |
| Avoid when | High strength needed | High strength needed; sulphur gases | Highest strength needed | Welding after ageing; long use above about 700 °C | Welded, corrosive wet service |
| Bar standard | ASTM B166 | ASTM B166 | ASTM B446 / B166 | ASTM B637 | ASTM B637 |
| Machinability | Fair | Fair | Fair, work-hardens | Best solution-treated; aged is hard | Best solution-treated |
Highest strength: 718 (or X750 for relaxation resistance). Corrosion plus toughness and weldability: 625. Extreme heat and scaling in furnaces: 601, then 600. If you are unsure, send temperature, media, load, and target part, and we will help you pick before you order.
Technical data
Inconel Round Bar Chemical Composition
| Element (%) | 600 | 601 | 625 | 718 | X750 |
|---|---|---|---|---|---|
| Nickel | 72.0 min | 58.0 – 63.0 | 58.0 min | 50.0 – 55.0 | 70.0 min |
| Chromium | 14.0 – 17.0 | 21.0 – 25.0 | 20.0 – 23.0 | 17.0 – 21.0 | 14.0 – 17.0 |
| Iron | 6.0 – 10.0 | Balance | 5.0 max | Balance | 5.0 – 9.0 |
| Molybdenum | – | – | 8.0 – 10.0 | 2.8 – 3.3 | – |
| Niobium (+Ta) | – | – | 3.15 – 4.15 | 4.75 – 5.50 | 0.70 – 1.20 |
| Titanium | – | – | 0.40 max | 0.65 – 1.15 | 2.25 – 2.75 |
| Aluminium | – | 1.0 – 1.7 | 0.40 max | 0.20 – 0.80 | 0.40 – 1.00 |
| Carbon | 0.15 max | 0.10 max | 0.10 max | 0.08 max | 0.08 max |
| Manganese | 1.0 max | 1.0 max | 0.50 max | 0.35 max | 1.0 max |
| Silicon | 0.50 max | 0.50 max | 0.50 max | 0.35 max | 0.50 max |
| Copper | 0.50 max | 1.0 max | – | 0.30 max | 0.50 max |
| Sulphur | 0.015 max | 0.015 max | 0.015 max | 0.015 max | 0.010 max |
Inconel Round Bar Mechanical Properties
| Typical property | 600 | 601 | 625 | 718 (aged) | X750 (aged) |
|---|---|---|---|---|---|
| Density | 8.47 g/cm³ | 8.11 g/cm³ | 8.44 g/cm³ | 8.19 g/cm³ | 8.28 g/cm³ |
| Melting range | 1354 – 1413 °C | 1360 – 1411 °C | 1290 – 1350 °C | 1260 – 1336 °C | 1393 – 1427 °C |
| Tensile strength (min.) | 550 MPa (80 ksi) | 550 MPa (80 ksi) | 690 – 827 MPa (100 – 120 ksi) | 1240 MPa (180 ksi) | About 1,100 MPa, condition-dependent |
| Yield, 0.2% (min.) | 240 MPa (35 ksi) | 205 MPa (30 ksi) | 276 – 414 MPa (40 – 60 ksi) | 1030 MPa (150 ksi) | About 700 – 800 MPa, condition-dependent |
| Elongation (min.) | 30% | 30% | 30% | 12% | About 20% |
| Approx. max. service temp. (oxidation) | About 1090 °C | About 1150 °C | About 980 °C | About 700 °C (strength-limited) | About 980 °C (strength to about 700 °C) |
| Low-temperature use | Good to −196 °C | Good | Good to −196 °C | Good to −250 °C | Good |
Values are typical minimums for annealed bar (600, 601, 625) and aged bar to ASTM B637 (718). 625 shows a range because ASTM B446 has an annealed grade and a solution-annealed grade. X750 figures depend heavily on heat treatment, so the values are indicative only. Your MTC gives the real figures, and design should use those.
Inconel Round Bar Specification
| Parameter | Details |
|---|---|
| Grades | Inconel 600, 601, 625, 718, X750; Incoloy 825 and 800 series on request |
| Standards | ASTM B166 / ASME SB166 (600, 601, 625 and others), ASTM B446 / ASME SB446 (625), ASTM B637 / ASME SB637 (718, X750); AMS 5665, 5666, 5662/5663, 5667 on request [confirm] |
| Forms | Round, hex, square, flat, forged bar, rings and blanks |
| Diameter | Ø 6 mm to Ø 300 mm typical; larger by forging [confirm] |
| Length | 1 to 6 m random, or cut to length |
| Condition | Hot-finished, annealed, solution-treated, aged (718, X750), cold-drawn |
| Surface finish | Black (hot-finished), pickled, rough turned, peeled, cold-drawn, centreless ground, polished |
| Tolerance | To standard, or ISO h9 – h11 for drawn and turned bar; ground bar tighter [confirm] |
| Certificates | EN 10204 3.1 MTC; 3.2 on request; raw-material certificate |
| Testing | PMI, chemical, mechanical, hardness, ultrasonic (UT) on request |
| Packing | Bundled, wrapped, wooden cases or crates, marked with grade and heat number |
Inconel Round Bar Size and Weight Tables
Nickel alloys are denser than steel, so weight charts based on 7.85 density understate bar weight by 5–8%. The tables below use real densities.
Round Bar Weight per Metre (kg/m)
| Diameter (mm) | Inconel 600 | Inconel 601 | Inconel 625 | Inconel 718 | Inconel X750 |
|---|---|---|---|---|---|
| 10 | 0.67 | 0.64 | 0.66 | 0.64 | 0.65 |
| 12 | 0.96 | 0.92 | 0.95 | 0.93 | 0.94 |
| 16 | 1.70 | 1.63 | 1.70 | 1.65 | 1.66 |
| 20 | 2.66 | 2.55 | 2.65 | 2.57 | 2.60 |
| 25 | 4.16 | 3.98 | 4.14 | 4.02 | 4.06 |
| 32 | 6.81 | 6.52 | 6.79 | 6.59 | 6.66 |
| 40 | 10.64 | 10.19 | 10.61 | 10.29 | 10.40 |
| 50 | 16.63 | 15.92 | 16.57 | 16.08 | 16.26 |
| 63 | 26.40 | 25.28 | 26.31 | 25.53 | 25.81 |
| 80 | 42.57 | 40.77 | 42.42 | 41.17 | 41.62 |
| 100 | 66.52 | 63.70 | 66.29 | 64.32 | 65.03 |
| 125 | 103.94 | 99.52 | 103.57 | 100.51 | 101.61 |
| 150 | 149.68 | 143.32 | 149.15 | 144.73 | 146.32 |
| 200 | 266.09 | 254.78 | 265.15 | 257.30 | 260.12 |
Formula: weight (kg/m) = d² × 0.006652 (600), 0.006370 (601), 0.006629 (625), 0.006433 (718) or 0.006503 (X750), with diameter d in mm. Worked example: a 50 mm bar of 625 weighs 50 × 50 × 0.006629 ≈ 16.57 kg per metre. Add 2–3 mm to the diameter for peeling or turning allowance when you buy bar to machine.
Hex Bar Weight per Metre (kg/m, 625 and 718)
| Across flats (mm) | Inconel 625 | Inconel 718 | Inconel 600 |
|---|---|---|---|
| 13 | 1.24 | 1.20 | 1.24 |
| 17 | 2.11 | 2.05 | 2.12 |
| 19 | 2.64 | 2.56 | 2.65 |
| 24 | 4.21 | 4.09 | 4.22 |
| 30 | 6.58 | 6.38 | 6.60 |
| 36 | 9.47 | 9.19 | 9.51 |
| 46 | 15.47 | 15.01 | 15.52 |
| 55 | 22.11 | 21.45 | 22.19 |
Quick Formulas for Other Shapes
- Hex bar: kg/m = 0.866 × AF² × density ÷ 1000 (AF in mm, density in g/cm³)
- Square bar: kg/m = side² × density ÷ 1000
- Flat bar: kg/m = width × thickness × density ÷ 1000
Example, 625 flat bar 50 × 10 mm: 50 × 10 × 8.44 ÷ 1000 = 4.22 kg/m.
Conditions, Finishes and Tolerances
| Finish / condition | Code | Typical use | Indicative tolerance [confirm before quoting] |
|---|---|---|---|
| Hot-finished, black | HF | Heavy sections, forging stock | Per standard, wider |
| Hot-rolled, annealed, pickled | HRAP | General machining stock | Per standard |
| Rough turned / peeled | RT / P | Removes surface defects | About h12 – h13 |
| Cold-drawn | CD | Smaller diameters, bright surface | h9 – h11 |
| Centreless ground | CG | Precision shafts, pins | h8 – h9 |
| Polished | – | Appearance, sealing surfaces | h8 – h11 |
Supply States
- Annealed (ANN): standard for 600, 601 and 625. Soft and ductile.
- Solution-treated: best for machining 718 or X750 before ageing.
- Precipitation-hardened / aged (PH): 718 and X750 in final strength condition.
- Hardened and tempered (H&T): used loosely by some sellers; always confirm exactly which condition you want, including hardness range.
Typical hardness: annealed 600, 601 and 625 bar usually sits in the mid-80s to mid-90s HRB. Aged 718 is typically in the range of about 36–44 HRC. These are indicators only, and acceptance is by the standard and your MTC. For sour service, hardness for 718 is limited under NACE MR0175 / ISO 15156, so state that requirement up front.
Heat Treatment, Machining and Welding Guidance
| Grade | Typical treatment |
|---|---|
| 600, 601, 625 | Annealed by the mill. Cannot be hardened by heat treatment; hardening comes only from cold work. |
| 718 | Solution treat at about 950–980 °C, then age: 720 °C for 8 hours, furnace cool to 620 °C, hold to a total of 18 hours, air cool. Follow the specification you are ordering to. |
| X750 | Solution treated, then aged per ASTM B637 or AMS 5667 to the required condition. |
Machining
- Nickel alloys work-harden fast. Keep the tool cutting, use sharp carbide tools, positive rake and a rigid setup.
- Use heavy feeds and steady depth of cut instead of light passes that rub.
- Use plenty of flood coolant, free of sulphur and chlorine.
- Rough-machine 718 and X750 in solution-treated condition, then age, then finish-machine, so distortion is controlled.
Welding
- 600, 601 and 625 weld well by GTAW, GMAW and SMAW, with matching filler such as ERNiCr-3 or ERNiCrMo-3 (625).
- 718 can be welded in solution-treated condition and then aged, but strain-age cracking is a risk. Aged 718 should not be welded without a procedure.
- Clean thoroughly. Sulphur, lead and low-melting contaminants cause cracking.
- Qualify procedures to ASME Section IX.
Inconel vs Other Alloy Round Bars
| Alloy bar | Strong at | Weak at | Relative cost |
|---|---|---|---|
| Inconel 625 / 718 / 600 / 601 / X750 | High-temperature strength, oxidation and chloride resistance | Higher cost than stainless steel | $$$ |
| Hastelloy C276 / C22 / B2 | Hot acids, wet chlorine, HCl (B2) | Highest cost; lower strength annealed | $$$$ |
| Monel 400 / K500 | Hydrofluoric acid, seawater; K500 is high strength | Oxidising acids; lower temperature limit | $$$ |
| Incoloy 825 / 800 series | Acid service (825), carburising and creep (800H/HT) | Lower strength than 718 | $$ |
| Nickel 200/201 | Caustic soda, food and electronics | Sulphur-bearing atmospheres | $$$ |
| Titanium Gr 5 / Gr 2 | Seawater, weight saving | Reducing acids, high temperature in air | $$$ |
| Super duplex / duplex | Chloride SCC, strength at moderate temperature | Above about 300 °C | $$ |
| 904L, 317L, 347H | Moderate corrosion or heat, lower cost | Severe chlorides, very high temperature | $ – $$ |
| Copper-nickel 90/10 | Seawater piping and marine | Strength and temperature | $$ |
Browse the special alloy round bar range or the materials guide for more side-by-side data. If a cheaper bar meets your specification, we will tell you.
Inconel Round Bar Applications
| Industry | Where Inconel round bar is used | Preferred grade |
|---|---|---|
| Power generation | Turbine shafts, casing studs, boiler and steam-line hardware | 718, 625, 600 |
| Aerospace and defence | Engine parts, exhaust systems, fasteners | 718, 625, X750 |
| Oil & gas | Wellhead, valve stems, downhole tools, sour-service parts | 718, 625 |
| Chemical & petrochemical | Reformer parts, reactor internals, heat-exchanger hardware | 625, 600, 601 |
| Heat treatment and furnaces | Fixtures, rollers, burners, radiant tube fittings | 601, 600 |
| Marine and desalination | Shafts, pump parts, offshore bolting | 625 |
| Nuclear | Steam-generator and reactor hardware | 600, 690 on request |
| Springs and fasteners | Bolts, studs, springs, pins | 718, X750, 625 |
Many of these bars end up as bolting. Our Inconel fasteners pages cover 600, 601, 625 and 718 bolts, studs and nuts, ready to install.
Quality Assurance and Testing
| Step | What happens |
|---|---|
| 1. Requirement review | Grade, condition, diameter, length, standard and certificates confirmed with you |
| 2. Mill sourcing | Bar from approved mills, with heat number and MTC |
| 3. Incoming inspection | Dimensions, straightness, surface and marking checked against the MTC |
| 4. PMI check | XRF positive material identification of every bar or bundle |
| 5. Cutting and finishing | Sawn to length, ends deburred, marked with grade and heat number |
| 6. Final inspection | Documents reviewed, tags checked, sizes re-measured |
| 7. Packing and dispatch | Bundled, capped or wrapped, cased and shipped with certificates |
Tests Available on Request
- Chemical analysis and PMI
- Tensile, yield, elongation and hardness
- Ultrasonic testing (UT) of bar
- Grain size and microstructure
- Intergranular corrosion testing where specified
- Stress-rupture or creep testing (718) where specified
- Third-party inspection by an agency of your choice
Standards and Certifications
| Standard / certificate | What it covers |
|---|---|
| ASTM B166 / ASME SB166 | Nickel-chromium-iron alloy (UNS N06600, N06601, N06690 and others) rod, bar and wire |
| ASTM B446 / ASME SB446 | Nickel-chromium-molybdenum-columbium (UNS N06625) rod and bar |
| ASTM B637 / ASME SB637 | Precipitation-hardening nickel alloy bars, forgings and stock for high-temperature service (UNS N07718, N07750) |
| ASTM B425 / ASME SB425 | Incoloy 825 (UNS N08825) rod and bar |
| ASTM B408 / ASME SB408 | Incoloy 800 / 800H / 800HT rod and bar |
| AMS 5665, 5666, 5662/5663, 5667 | Aerospace bar specifications for 600, 625, 718 and X750 [confirm before listing] |
| NACE MR0175 / ISO 15156 | Materials for sour service; limits for 718 [check current revision] |
| EN 10204 3.1 / 3.2 | Mill test certificate; 3.2 with independent inspection |
| ISO 9001 [confirm details] | Quality management |
Inconel® is a registered trademark of Special Metals Corporation. Aashish Metals supplies to the equivalent UNS and ASTM specifications.
Inconel Round Bar Price and Bar Stock: What Drives It
If you searched for inconel 718 round bar price or inconel bar stock price, you probably want a figure. We do not publish one because nickel, chromium, molybdenum and niobium move often, and a price without grade, condition, diameter and length is meaningless. (Some sites publish a stock-price list with no units or grades, which we think is worse than none.) Here is what shapes your quote:
| Price factor | Why it matters |
|---|---|
| Grade | 718, X750 and 625 cost more than 600 or 601 because of niobium, titanium and molybdenum |
| Diameter and length | Larger diameters and full lengths use more nickel and are priced per kg |
| Condition | Aged, cold-drawn, peeled, ground or polished bar costs more than hot-finished |
| Standard | AMS aerospace specs and extra tests add cost |
| Quantity | Full bars and larger lots cost less per kg than cut pieces |
| Cutting | Sawing and small pieces increase the cost per kg |
| Certification | 3.2 and additional tests such as UT or stress-rupture add cost |
| Nickel and alloy metals market | Base prices move with LME nickel and alloying elements |
| Destination | Freight, export packing and Incoterms |
For a quick, accurate quote, send: grade, standard, condition, diameter or size, length, quantity, certificates and delivery location.
Ordering, Delivery and Documents
| Topic | Details [confirm all before publishing] |
|---|---|
| Minimum order | Single bars and cut pieces supported; contact us |
| Availability | Stock sizes ship quickly; forged or special sizes are quoted per job |
| Packing | Bundled, wrapped, cased or crated; marked with grade, heat number and size |
| Port of dispatch | Mumbai / Nhava Sheva |
| Payment | LC, TT and other agreed terms |
| Documents | Commercial invoice, packing list, MTC, certificate of origin; inspection reports on request |
| HS code | Confirm with your customs broker, since classification depends on shape, alloy and destination |
| Export | We ship across India and worldwide |
Why Buy from Aashish Metals
- Traceable material. Heat number, MTC and PMI on every lot.
- One supplier from bar to finished joint. Round bar, sheets and plates, pipes and tubes and finished fasteners in matching alloys.
- Straight technical advice. We flag condition, hardness and welding issues before you order.
- Cut to length. Order what you need, and reduce offcut waste.
- Wide alloy range. Compare Inconel with Hastelloy, Monel, Incoloy, titanium and duplex through one contact.
- Custom work. Forging, peeling, grinding and heat treatment to drawing or specification [confirm in-house vs partner].
Read more about Aashish Metals, browse our technical blog, explore nickel alloy products or contact our team. Looking for a specific grade? Go directly to Inconel 625 round bars, 718, 600 or 601.
FAQs about Inconel Round Bar
It is machined into shafts, studs, bolts, valve stems, flange blanks, springs and furnace parts wherever stainless steel would lose strength or corrode. Power, aerospace, oil and gas, chemical, marine and heat-treatment plants are the main users.
625 is solid-solution strengthened, so it is tough, weldable and highly corrosion resistant. 718 is precipitation-hardened and much stronger (about 1,240 MPa tensile when aged), but best up to about 650–700 °C and harder to weld and machine once aged. Choose 625 for corrosion, 718 for strength.
For oxidation and scaling, 601 leads (about 1,150 °C), followed by 600 (about 1,090 °C). 600 is preferred where caustic or chloride cracking resistance is needed. Neither is a high-strength bar. For strength at temperature, look at 718 or X750.
ASME SB 166 is the specification for nickel-chromium-iron alloy rod, bar and wire (including UNS N06600 and N06601). ASME SB 446 covers alloy 625 (UNS N06625) rod and bar. They are the ASME versions of ASTM B166 and B446. 718 and X750 bar are supplied to ASTM B637 / ASME SB 637.
Order solution-treated if you will machine before ageing, or aged if you need final strength now. Always state the condition, hardness range and any NACE MR0175 requirement. When in doubt, ask us before ordering.
825 is technically Incoloy 825 (UNS N08825), not Inconel, and it is supplied to ASTM B425. It is a strong choice for sulphuric and phosphoric acid service, and we supply it alongside Inconel bars.
Use kg per metre = d² × 0.006629 for 625, × 0.006652 for 600, × 0.006370 for 601, × 0.006433 for 718 and × 0.006503 for X750, with d in millimetres. Steel formulas underestimate weight because nickel alloys are denser.
Need Inconel round bar cut to size, with the right paperwork?
Tell us the grade, diameter, length and quantity, or send your drawing. We will reply with a clear quote and the right certificates, and an engineer can help you choose between 600, 601, 625, 718 and X750.
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