About Nickel Alloys — Inconel · Hastelloy · Monel · 904L
Nickel Alloys excel where temperatures exceed 600°C, where corrosive media (acids, alkalis, chlorides, sulphur) demand more than stainless steel can offer, and where mechanical integrity is non-negotiable. Suresh Metals stocks three major nickel alloy families: Inconel (high-temperature, oxidation-resistant), Hastelloy (exceptional aqueous corrosion resistance), and Monel (seawater and reducing acids), plus the super-austenitic 904L.
Nickel Alloy Sheets & Plates — Inconel · Hastelloy · Monel · 904L
Nickel Alloy Sheets & Plates are supplied in hot-rolled and cold-rolled conditions, annealed and pickled, conforming to ASTM specifications. Inconel 625 and Hastelloy C-276 plates are most widely used for chemical equipment, pressure vessels, and offshore applications. All material comes with full MTC including chemical and mechanical test results.
Sheet (CR)
0.3 mm to 6.0 mm
Plate (HR)
5 mm to 100 mm
Width × Length
Up to 2000 × 6000 mm
| Grade | Thickness (mm) | Width (mm) | Length (mm) | Finish |
|---|---|---|---|---|
| Inconel 600 / 625 | 0.3–100 | Up to 2000 | Up to 6000 | Annealed / Pickled |
| Inconel 800 / 825 | 0.3–100 | Up to 2000 | Up to 6000 | Annealed / Pickled |
| Hastelloy C-276 | 0.3–50 | Up to 2000 | Up to 6000 | Annealed / Pickled |
| Hastelloy C-22 | 0.3–50 | Up to 2000 | Up to 6000 | Annealed |
| Monel 400 | 0.5–50 | Up to 1500 | Up to 6000 | Annealed / Pickled |
| 904L | 0.3–60 | Up to 2000 | Up to 6000 | 2B / Annealed & Pickled |
Standards
Nickel Alloy Round Bar — Inconel · Hastelloy · Monel · 904L
Nickel Alloy Round Bars are produced by hot-rolling or forging and supplied in annealed condition, with optional straightening, turning, and grinding. Inconel 718 bars are extensively used for turbine blades and fasteners; Monel K-500 age-hardened bars provide exceptional strength in seawater service.
Diameter
3 mm to 400 mm
Length
0.5 m to 6 m
Finish
Black / Turned / Ground
| Grade | Diameter (mm) | Condition | Typical Application |
|---|---|---|---|
| Inconel 600 | 6–400 | Annealed | Furnace components, chemical processing |
| Inconel 625 | 6–300 | Annealed | Aerospace, offshore, seawater |
| Inconel 718 | 6–300 | Annealed / Aged | Gas turbines, aerospace fasteners |
| Inconel X-750 | 6–200 | Annealed / STA | Springs, bolts, turbine blades |
| Hastelloy C-276 | 6–300 | Annealed | Chemical processing, scrubbers |
| Hastelloy C-22 | 6–250 | Annealed | Multipurpose corrosion resistance |
| Monel 400 | 6–300 | Annealed | Seawater, valves, pump shafts |
| Monel K-500 | 6–200 | Aged | Propeller shafts, marine fasteners |
| 904L | 6–300 | Annealed | Acid corrosion environments |
Standards
Nickel Alloy Seamless Pipes & Tubes — Inconel · Hastelloy · Monel
Nickel Alloy Seamless Pipes & Tubes are critical in high-temperature, high-pressure services where standard stainless steels corrode or fail. Suresh Metals stocks Inconel 600, Inconel 625, and Hastelloy C-276 in the most commonly specified ASTM dimensions. Heat-exchanger and condenser tubes in Inconel 825 and Monel 400 are held in stock.
Pipe OD
6 mm to 323 mm
Wall Thickness
0.5 mm to 20 mm
Length
1 m to 6 m
| Grade | OD Range | Wall (mm) | Standard | Application |
|---|---|---|---|---|
| Inconel 600 | 6–273 | 0.8–15 | ASTM B167 | Furnace tubes, heat exchangers |
| Inconel 625 | 6–273 | 0.8–20 | ASTM B444 | Chemical processing, offshore |
| Inconel 800 | 19–273 | 1.6–15 | ASTM B407 | HX tubes, furnace tubes |
| Inconel 825 | 19–168 | 1.6–12 | ASTM B423 | Acid HX, chemical vessels |
| Hastelloy C-276 | 6–219 | 0.8–15 | ASTM B622 | Chemical, pharmaceutical |
| Hastelloy C-22 | 6–168 | 0.8–12 | ASTM B622 | Multipurpose corrosion |
| Monel 400 | 19–168 | 1.6–12 | ASTM B165 | Seawater, desalination |
Standards
Nickel Alloy Flanges — Inconel · Hastelloy · Monel · 904L
Nickel Alloy Flanges connect high-temperature, high-corrosion piping systems. All types available — Weld Neck, Slip-On, Blind, Socket Weld, Threaded, and Lap Joint — in ASME B16.5 / B16.47 dimensions. Forged to ASTM B564 (nickel alloys) and furnished annealed with RF/FF/RTJ facings.
Types
WN · SO · BL · SW · TH · LJ
Size Range
½″ – 24″ NB
Pressure Class
150# – 2500#
| Flange Type | Size Range | Pressure Class | Standard |
|---|---|---|---|
| Weld Neck (WNF) | ½″–24″ | 150#–2500# | ASME B16.5 / ASTM B564 |
| Slip-On (SOF) | ½″–24″ | 150#–600# | ASME B16.5 |
| Blind (BLF) | ½″–60″ | 150#–2500# | ASME B16.5 / B16.47 |
| Socket Weld (SWF) | ½″–4″ | 3000#–6000# | ASME B16.11 |
| Threaded (TF) | ½″–4″ | 3000#–6000# | ASME B16.11 |
| RTJ Flange | ½″–24″ | 300#–2500# | ASME B16.5 |
Standards
Nickel Alloy Pipe Fittings — Inconel · Hastelloy · Monel
Nickel Alloy Buttweld & Socket-Weld Fittings — elbows, tees, reducers, caps, and unions — complete the piping system. Supplied to ASME B16.9 dimensions with ASTM A403/B366 material conformance.
BW Fittings
½″–24″ NB
SW/Threaded
½″–4″ NB
Standards
ASME B16.9 / B16.11
| Fitting Type | Size Range | Material Standard |
|---|---|---|
| 90° Elbow LR / SR · 45° Elbow | ½″–24″ | ASTM B366 |
| Equal / Reducing Tee | ½″–24″ | ASTM B366 |
| Concentric / Eccentric Reducer | ½″–24″ | ASTM B366 |
| End Cap · Stub End | ½″–24″ | ASTM B366 |
| SW / Threaded Fittings | ½″–4″ | ASTM B564 |
Standards
Nickel Alloy Blocks & Blanks — Inconel 625 · 718 · Hastelloy · Monel
Nickel Alloy Blocks & Blanks for heavy machining of valve bodies, pump casings, and pressure vessel nozzles. Ultrasonic testing available.
Thickness
25–300 mm
Dimensions
Up to 2000 × 4000 mm
Condition
Annealed
| Grade | Thickness Range | Condition |
|---|---|---|
| Inconel 625 | 25–300 mm | Annealed |
| Hastelloy C-276 | 25–200 mm | Annealed |
| Monel 400 | 25–250 mm | Annealed |
Standards
Nickel Alloy Grade Reference — Inconel · Hastelloy · Monel · 904L
Chemical Composition — % by weight (max unless ranged)
| Alloy | Ni | Cr | Mo | Fe | Cu | Others | Key Characteristic |
|---|---|---|---|---|---|---|---|
| Inconel 600 | 72 min | 14–17 | — | 6–10 | ≤0.5 | — | Oxidation resistance to 1000°C |
| Inconel 601 | 58–63 | 21–25 | — | Bal | — | Al 1.0–1.7 | Oxidation & scaling resistance |
| Inconel 617 | 44.5 min | 20–24 | 8–10 | 3 max | — | Co 10–15, Al 0.8–1.5 | Creep strength above 900°C |
| Inconel 625 | 58 min | 20–23 | 8–10 | 5 max | — | Nb 3.15–4.15 | Outstanding corrosion + fatigue resistance |
| Inconel 718 | 50–55 | 17–21 | 2.8–3.3 | Bal | — | Nb 4.75–5.5, Al 0.2–0.8 | Aerospace; age-hardened high strength |
| Inconel 800 | 30–35 | 19–23 | — | Bal | — | Al+Ti ≥ 0.85 | Carburisation resistance to 900°C |
| Inconel 825 | 38–46 | 19.5–23.5 | 2.5–3.5 | 22 max | 1.5–3.0 | Ti 0.6–1.2 | Sulphuric/phosphoric acid service |
| Inconel X-750 | 70 min | 14–17 | — | 5–9 | — | Ti 2.25–2.75, Nb 0.7–1.2 | Springsand high-temp bolts |
| Hastelloy C-22 | Bal | 20–22.5 | 12.5–14.5 | 2–6 | — | W 2.5–3.5, Co 2.5 max | Broadest corrosion resistance |
| Hastelloy C-276 | Bal | 14.5–16.5 | 15–17 | 4–7 | — | W 3–4.5, Co 2.5 max | Widest chloride corrosion resistance |
| Monel 400 | 63–70 | — | — | 2.5 max | 28–34 | Mn 2.0 max | Seawater, reducing acids |
| Monel K-500 | 63–70 | — | — | 2 max | 27–33 | Al 2.3–3.15, Ti 0.35–0.85 | Age-hardened; high strength + corrosion |
| 904L | 23–28 | 19–23 | 4.0–5.0 | Bal | 1.0–2.0 | — | Super-austenitic; H₂SO₄ resistance |
Mechanical Properties — Annealed / Standard Condition
| Alloy | Condition | UTS (MPa) | YS (MPa) | Elong % | Hardness |
|---|---|---|---|---|---|
| Inconel 600 | Annealed | 550 | 240 | 30 | <99 HRB |
| Inconel 625 | Annealed | 827 | 414 | 30 | <100 HRB |
| Inconel 718 | Annealed | 965 | 550 | 30 | <100 HRB |
| Inconel 718 | Aged | 1240 | 1035 | 12 | 40 HRC |
| Hastelloy C-276 | Annealed | 690 | 283 | 40 | <99 HRB |
| Monel 400 | Annealed | 483 | 172 | 35 | <75 HRB |
| Monel K-500 | Aged | 1103 | 758 | 20 | 98 HRB |
| 904L | Annealed | 520 | 220 | 35 | 70 HRB max |
Grade Selection Guide
| Requirement | Recommended Alloy |
|---|---|
| Oxidation resistance up to 1000°C | Inconel 600 or 601 |
| High-temperature creep strength above 900°C | Inconel 617 or 718 |
| Best all-round corrosion resistance (acids + chlorides) | Hastelloy C-276 or C-22 |
| Seawater service, marine valves | Monel 400 |
| High-strength marine fasteners | Monel K-500 |
| Sulphuric acid / phosphoric acid HX | Inconel 825 or 904L |
| Springs, high-temp bolts | Inconel X-750 |
| Aerospace turbine components | Inconel 718 (aged) |
Why Buy Nickel Alloys from Suresh Metals?
Ready Stock — No Lead Times
All grades held in ready stock at our Mumbai facility. Same-day or next-day dispatch on standard sizes.
Mill Test Certificates (MTC)
Every consignment includes a heat-traceable MTC. NACE, PMI, third-party inspection on request.
Pan-India Delivery & Exports
Domestic delivery to any factory gate. Export to Middle East, SE Asia & Africa — sea-worthy packing, LC & TT accepted.
Cut-to-Size Processing
Plasma, waterjet, shearing, and sawing services — receive material sized to your drawing.
37+ Years of Expertise
Established 1987. Our team advises the right grade and form for your exact application.
Competitive Pricing
Direct mill sourcing and volume stock means best-in-market rates. Quote within 4 business hours.