High-Performance Alloys
High-Performance Alloys : Specifications | Grades & Standards | Equivalent Grades | Chemical Composition | Mechanical Properties | FAQ
Durable High-Performance Alloy Fittings & Flanges for aerospace, chemical, petrochemical, and marine industries. Manufactured in Seamless, Welded, and Forged designs, compliant with ANSI, DIN, BS, and EN standards. Delivered to UK, Qatar, Egypt, and Thailand.
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. specializes in delivering advanced high-performance alloys engineered for the most demanding industrial environments. Our portfolio includes Inconel, Incoloy, Monel, Nimonic, and other superalloys, crafted into pipe fittings, flanges, and custom forged components. Our products cater to aerospace, power generation, chemical processing, and marine industries.
With a commitment to precision and reliability, we manufacture seamless, welded, and forged alloy components in compliance with global standards, including ASTM, ASME, DIN, BS, and EN. Backed by stringent quality checks and technical expertise, we provide high-performance alloy solutions that combine durability, corrosion resistance, and mechanical strength. We serve clients across the UK, Qatar, Egypt, Thailand, Vietnam, and other international markets.
High-performance alloys, including nickel-based superalloys such as Inconel, Incoloy, Monel, and Nimonic, are specifically engineered for extreme operating conditions involving high temperatures, aggressive chemical environments, and elevated mechanical stresses. These alloys offer exceptional corrosion resistance against both oxidizing and reducing agents, along with excellent creep and fatigue strength, and maintain superior thermal stability up to 1000°C and beyond, depending on the specific grade.
These alloys are manufactured in seamless, welded, and forged forms, strictly adhering to international standards including ASTM, ASME, DIN, BS, and EN. Typical applications span gas turbines, boiler components, chemical reactors, furnace systems, offshore and marine piping, and aerospace components. Their chemical composition is characterized by high nickel content, often alloyed with chromium, cobalt, molybdenum, titanium, and aluminum to enhance both mechanical performance and corrosion resistance.
High-performance alloys - Specifications
Superalloys pipe fittings & flanges – Grades & Standards
| Material Category | Grade | Standards (ASTM / ASME) | Typical Use / Application |
|---|---|---|---|
| Nickel Alloy | Inconel 600 (UNS N06600) |
ASTM B366 / SB366 (Buttweld Fittings) ASTM B564 / SB564 (Forged Fittings & Flanges) |
High-temperature oxidation & corrosion resistance, furnace components, heat exchangers, chemical processing |
| Nickel Alloy | Inconel 625 (UNS N06625) |
ASTM B366 / SB366 (Buttweld Fittings) ASTM B564 / SB564 (Forged Fittings & Flanges) |
Chemical reactors, marine applications, aerospace components, high-temperature piping systems |
| Nickel Alloy | Inconel 718 (UNS N07718) |
ASTM B366 / B564 (Buttweld & Forged Fittings) |
Turbine blades, aerospace components, high-strength structural applications at elevated temperatures |
| Nickel Alloy | Inconel X750 (UNS N07750) |
ASTM B366 / B564 (Buttweld & Forged Fittings) |
Gas turbines, aerospace springs, high-temperature mechanical components |
| Nickel Alloy | Incoloy 800 / 800H / 800HT (UNS N08800 / N08810 / N08811) |
ASTM B366 / B564 (Buttweld & Forged Fittings) |
Boilers, heat exchangers, chemical reactors, high-temperature piping |
| Nickel Alloy | Incoloy 825 (UNS N08825) |
ASTM BASTM SB366 / B564 (Buttweld & Forged Fittings) |
Acidic chemical processing, offshore piping, petrochemical reactors, marine applications |
| Nickel Alloy | Incoloy 925 (UNS N09925) |
ASTM B366 / B564 (Buttweld & Forged Fittings) |
Marine & offshore piping, corrosion-resistant equipment, chemical and seawater applications |
| Nickel Alloy | Monel 400 (UNS N04400) |
ASTM B366 / SB366 (Buttweld Fittings) ASTM B564 / SB564 (Forged Fittings & Flanges) |
Marine & seawater systems, heat exchangers, desalination plants, petroleum refining, chemical processing, pump & valve components exposed to brine |
| Nickel Alloy | Monel K500 (UNS N05500) |
ASTM B366 / SB366 (Buttweld Fittings) ASTM B564 / SB564 (Forged Fittings & Flanges) |
High-pressure & high-strength applications, offshore oil & gas, subsea tools, pump shafts, turbine blades, sour gas service, and components requiring superior mechanical strength with corrosion resistance |
| Nickel Alloy | Nimonic 75 / 80A | ASTM B366 / B564 (Buttweld & Forged Fittings) |
Gas turbines, high-temperature furnace components, aerospace components, high-strength piping and heat-resistant assemblies |
High-temperature resistant alloys - Equivalent Grades
| Alloy / Material | UNS | ASTM / ASME | EN / DIN |
JIS | Other / Werkstoff |
|---|---|---|---|---|---|
| Inconel 600 | N06600 | B127, B163, B168, B444 | 2.4816 | SUS660 | 1.4876 |
| Inconel 625 | N06625 | B443, B444, B564 | 2.4856 | SUS6625 | 1.4980 |
| Inconel 718 | N07718 | B637, B564 | 2.4668 | SUS7718 | 1.4563 |
| Inconel X750 | N07750 | B637, B564 | 2.4669 | SUS7750 | 1.4542 |
| Incoloy 800 / 800H / 800HT |
N08800 / N08810 / N08811 |
B409, B444, B564 | 1.4876 / 1.4958 / 1.4959 |
SUS800 / SUS800H / SUS800HT |
– |
| Incoloy 825 | N08825 | B409, B444, B564 | 2.4858 | SUS8825 | – |
| Incoloy 925 | N09925 | B409, B444, B564 | 2.4857 | SUS8925 | – |
| Monel 400 | N04400 | B127, B164, B366, B564 | 2.4360 | SUS4400 | 2.4360 |
| Monel K500 | N05500 | B127, B164, B366, B564 | 2.4375 | SUS4500 | 2.4375 |
| Nimonic 75 | – | B637, B564 | – | – | – |
| Nimonic 80A | – | B637, B564 | – | – | – |
Corrosion-resistant nickel alloys - Chemical Composition
| Alloy / Grade | Ni (%) | Cr (%) | Fe (%) | Mo (%) | Co (%) | Ti (%) | Al (%) | Other Elements (%) |
|---|---|---|---|---|---|---|---|---|
| Inconel 600 | 72 min | 14–17 | Balance | 0–1 | – | – | – | C 0.15 max, Mn 1 max, Si 0.5 max |
| Inconel 625 | 58 min | 20–23 | 5 max | 8–10 | – | – | – | C 0.10 max, Mn 0.50 max, Si 0.50 max |
| Inconel 718 | 50–55 | 17–21 | 18 max | 2.8–3.3 | 0.65–1.15 | 0.2–0.8 | 0.2–0.8 | C 0.08 max, Mn 0.35 max, Si 0.35 max |
| Inconel X750 | 70 min | 14–17 | Balance | 0–1 | 4.75–5.5 | 0.2–0.8 | 0.25–0.65 | C 0.15 max, Mn 1 max, Si 0.5 max |
| Incoloy 800H | 30–35 | 19–23 | Balance | 0–1 | – | – | – | C 0.06–0.10, Mn 1 max, Si 0.5 max |
| Incoloy 825 | 38–46 | 19.5–23.5 | 39.5 min | 2.5–3.5 | – | – | – | C 0.05 max, Mn 1 max, Si 0.5 max |
| Incoloy 925 | 42–47 | 19.5–23.5 | Balance | 2–3 | 1–2 | – | – | C 0.05 max, Mn 1 max, Si 0.5 max |
| Monel 400 | 63 min | 2 max | 28–34 | – | – | – | – | C 0.3 max, Mn 2 max, Si 0.5 max |
| Monel K500 | 63 min | 2 max | 28–34 | – | 0.5–1.5 | 0.3–0.7 | – | C 0.3 max, Mn 2 max, Si 0.5 max |
| Nimonic 75 | 75–80 | 20–22 | 0.5 max | 1 max | – | 0.7–1.2 | – | C 0.10 max, Mn 0.5 max, Si 0.5 max |
| Nimonic 80A | 77–80 | 19–22 | 0.5 max | 1 max | – | 0.5–1.0 | – | C 0.10 max, Mn 0.5 max, Si 0.5 max |
High-performance alloys - Mechanical Properties
| Alloy / Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Creep Resistance |
|---|---|---|---|---|---|
| Inconel 600 | 515–827 | 170–310 | 30–40 | 150–220 | Good up to 800°C |
| Inconel 625 | 827 | 414 | 30 | 200–250 | Excellent up to 980°C |
| Inconel 718 | 1240 | 1030 | 12 | 321 | Excellent up to 700°C |
| Inconel X750 | 930–965 | 550–620 | 15 | 250–290 | Very good up to 700°C |
| Incoloy 800H | 585 | 275 | 40 | 160–200 | Good up to 1093°C |
| Incoloy 825 | 585 | 275 | 40 | 160–200 | Excellent corrosion resistance |
| Incoloy 925 | 550–600 | 275–310 | 35–40 | 160–200 | Good high-temperature strength |
| Monel 400 | 550 | 240 | 35 | 150 | Good up to 540°C |
| Monel K500 | 690–827 | 414–550 | 20–35 | 200–250 | Good up to 540°C |
| Nimonic 75 | 900 | 550 | 15 | 250 | Excellent up to 980°C |
| Nimonic 80A | 950 | 600 | 15 | 260 | Excellent up to 1000°C |
How are High-Performance Alloys classified?
Nickel-based superalloys: Inconel, Nimonic, Monel – high strength, corrosion, and oxidation resistance.
Cobalt-based alloys: Excellent wear resistance and high-temperature performance.
Iron-based superalloys: Less common, used in certain chemical and high-temperature applications.
Classification is usually based on base metal, alloying elements, and intended operating conditions.
How do these alloys compare to stainless steel in performance?
Higher corrosion and oxidation resistance under extreme conditions.
Greater creep and fatigue resistance at elevated temperatures.
Can handle more aggressive chemical and marine environments.
Retain mechanical properties at temperatures where stainless steels would soften or fail.
What makes High-Performance Alloys resistant to corrosion and oxidation?
High nickel and chromium content forms a passive oxide layer on the surface, preventing further oxidation.
Molybdenum, cobalt, and titanium enhance resistance to reducing and oxidizing chemicals, acids, and seawater.
Special heat treatments and controlled alloying minimize susceptibility to stress corrosion cracking.
These alloys are particularly effective in aerospace, marine, and chemical environments where conventional materials fail.