Valve and flow control
Trim, stems, seats, sleeves and hardfaced parts in corrosive, erosive and high-pressure service.
Inconel 718Stellite 6Inconel 625Hastelloy C276
Family 01
Nickel-Based Superalloys
High strength and corrosion performance under demanding environments. For valve, oil & gas, and high-temperature applications requiring metallurgical confidence and documentation integrity.
ASTM / ASME verified
EN 10204 3.1
NACE MR0175 awareness
API 6A CRA
Key grades
Inconel 718
Inconel 625
Inconel 825
Hastelloy C276
Hastelloy X
Monel 400 / K500
Precipitation Hardenable
Inconel 718
UNS N07718
Nickel-chromium superalloy offering exceptional tensile strength, corrosion resistance, and fatigue performance. Widely specified for valve stems, oilfield CRA components, and high-pressure assemblies.
ASTM B637 (bars) · B670 (sheets)
Solution Annealed / Double Aged conditions
NACE MR0175 (hardness-controlled)
Stress rupture verification available
VIM + ESR route where specified
Solid Solution Strengthened
Inconel 625
UNS N06625
Exceptional corrosion resistance and weldability across a wide range of temperatures. Preferred for seawater service, heat exchangers, and CRA cladding applications.
ASTM B446 (bars) · B443 (sheets)
Annealed condition standard
Resistant to pitting and crevice corrosion
API 6A CRA Grade compliant (as applicable)
Corrosion Resistant
Inconel 825
UNS N08825
Nickel-iron-chromium alloy with excellent resistance to reducing and oxidizing acids. Used in chemical processing, oil & gas handling, and acidic service environments.
ASTM B425 (bars) · B424 (sheets)
Annealed condition
Resistant to H2SO4, H3PO4 environments
Chloride SCC resistant
High Molybdenum
Hastelloy C276
UNS N10276
Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in highly aggressive chemical environments. Widely used in process industry and flue gas applications.
ASTM B574 (bars) · B575 (sheets)
Solution annealed condition
Resistant to wet Cl2 and oxidizing acids
High Temperature
Hastelloy X
UNS N06002
High-temperature alloy with exceptional oxidation resistance and strength at elevated temperatures. Used in heat treating equipment, gas turbine components, and industrial furnace applications.
ASTM B435 (sheets) · B572 (bars)
Solution annealed condition
Service to ~1200°C oxidation resistance
Copper-Nickel
Monel 400 / K500
UNS N04400 / N05500
High strength and excellent corrosion resistance in seawater, brine, and hydrofluoric acid. K500 adds age-hardening for increased mechanical properties in pump shafts and valve stems.
ASTM B164 (bars) · B127 (sheets)
K500: Age hardened condition available
Seawater and HF acid service
Nickel alloy specification reference — bar product
Minimum mechanical properties per governing ASTM specification
| Grade | UNS | W. Nr. | ASTM (bar) | Condition | YS min MPa | TS min MPa | El. min % | Key chemistry (nominal wt%) |
|---|---|---|---|---|---|---|---|---|
| Inconel 718 | N07718 | 2.4668 | B637 | Sol. treated + aged | 1035 | 1275 | 12 | Ni 50–55 · Cr 17–21 · Nb+Ta 4.75–5.5 · Mo 2.8–3.3 · Ti 0.65–1.15 |
| Inconel 625 | N06625 | 2.4856 | B446 Gr. 1 | Annealed | 414 | 827 | 30 | Ni ≥58 · Cr 20–23 · Mo 8–10 · Nb+Ta 3.15–4.15 |
| Inconel 825 | N08825 | 2.4858 | B425 | Annealed | 241 | 586 | 30 | Ni 38–46 · Cr 19.5–23.5 · Mo 2.5–3.5 · Cu 1.5–3 · Ti 0.6–1.2 |
| Hastelloy C276 | N10276 | 2.4819 | B574 | Solution annealed | 283 | 690 | 40 | Ni bal. · Mo 15–17 · Cr 14.5–16.5 · W 3–4.5 · Fe 4–7 |
| Hastelloy X | N06002 | 2.4665 | B572 | Solution annealed | 240 | 655 | 35 | Ni bal. · Cr 20.5–23 · Fe 17–20 · Mo 8–10 · Co 0.5–2.5 |
| Monel 400 | N04400 | 2.4360 | B164 | Annealed | 193 | 483 | 35 | Ni ≥63 · Cu 28–34 · Fe ≤2.5 |
| Monel K500 | N05500 | 2.4375 | B865 | Age hardened | 690 | 965 | 20 | Ni ≥63 · Cu 27–33 · Al 2.3–3.15 · Ti 0.35–0.85 |
Reference only. Values are typical specification minimums for bar product in the stated condition. The governing requirements are always the ASTM/ASME edition, product form and supplementary conditions on your purchase order — verify against the EN 10204 3.1 certificate at receipt. NACE MR0175 service imposes additional hardness and condition limits (e.g. Inconel 718 at 40 HRC max).
Forms supplied: Round bars · Flat bars · Sheets · Plates · Custom profiles. Available forms subject to grade and stock confirmation. Contact us with your specific requirement.
Family 02
Cobalt-Based Alloys
Wear, erosion, and galling resistance for trim and hardfacing applications. Critical for control valve trim, pump components, and industrial wear surfaces operating under aggressive conditions.
Hardfacing grade
Erosion resistance
Galling resistance
High temperature
Key grades
Stellite Grade 6
Stellite Grade 12
Stellite Grade 21
Most Specified
Stellite Grade 6
Co-Cr-W Alloy
The most widely specified cobalt alloy for valve seat and trim applications. Excellent balance of hardness, wear resistance, and corrosion resistance across a broad temperature range.
Hardness approx. 38-43 HRC
Valve seats, stems, trims
Service to ~800°C
Available: round bars, rods, powders, overlay wire
High Hardness
Stellite Grade 12
Co-Cr-W Alloy
Higher hardness variant for applications requiring superior abrasion resistance. Used where sliding wear under high loads is the primary failure mechanism.
Hardness approx. 45-50 HRC
Abrasive and erosive wear service
Industrial pump and valve components
Corrosion Resistant
Stellite Grade 21
Co-Cr-Mo Alloy
Mo-bearing grade with enhanced corrosion resistance in acidic and caustic environments. Lower carbon content than Grade 6 — suitable for applications combining wear and chemical attack.
Improved acid corrosion resistance
Valve trims in aggressive chemical service
Available: round bars, rods, powders
Stellite grade selection reference
Nominal values — deposit hardness varies with process and dilution
| Grade | System | Hardness (typ.) | Nominal chemistry (wt%) | Primary selection driver | Typical service |
|---|---|---|---|---|---|
| Stellite 6 | Co-Cr-W | 38–43 HRC | Co bal. · Cr 28–32 · W 3.5–5.5 · C 0.9–1.4 | Balanced wear + corrosion resistance | Valve seats, stems and trim to ~800°C |
| Stellite 12 | Co-Cr-W | 45–50 HRC | Co bal. · Cr 29–31 · W 7.5–9.5 · C 1.4–1.85 | Higher hardness, abrasion resistance | Sliding wear under high load |
| Stellite 21 | Co-Cr-Mo | 28–35 HRC work-hardens in service | Co bal. · Cr 26–29 · Mo 4.5–6 · Ni 2–3 · C 0.2–0.35 | Corrosion resistance + galling resistance | Trim in acidic / caustic chemical service |
Reference only. Hardness of hardfacing deposits depends on welding process, number of layers and dilution from the substrate — specify the required deposit hardness and test location on the purchase order, and confirm against the test certificate.
Also available: Cobalt alloy round bars, rods and powders for PTA/thermal spray · Custom overlay specifications on request.
Family 03
Duplex & Super Duplex Stainless Steels
High-strength, corrosion-resistant stainless steels for aggressive oil & gas and process environments. Specification discipline is critical — ferrite balance, PREN, and heat treatment condition are non-negotiable.
Dual-phase microstructure
High PREN
Ferrite content verified
Solution annealed
Key grades
Duplex 2205
Super Duplex 2507
Zeron 100
Standard Duplex
Duplex 2205
UNS S32205 / S31803
The most widely used duplex grade — balanced austenite-ferrite microstructure offering high strength and excellent chloride corrosion resistance. Preferred for offshore, desalination, and process applications.
ASTM A182 F51 (forgings) · A240 (sheets) · A276 (bars)
PREN ≥ 35
Solution annealed + water quenched
Ferrite content 40-60% (typical)
Super Duplex
Super Duplex 2507
UNS S32750
High PREN grade for the most aggressive chloride and seawater environments. Significantly higher corrosion resistance than standard duplex, with superior mechanical properties.
ASTM A182 F53 · A240 · A276
PREN ≥ 43
Solution annealed condition
Subsea, offshore, desalination service
Super Duplex
Zeron 100
UNS S32760
High alloy super duplex with tungsten addition for enhanced pitting and crevice corrosion resistance. Used in aggressive offshore and chemical process environments.
PREN ≥ 40
W-bearing — improved pitting resistance
Solution annealed condition
Duplex & super duplex specification reference — bar product
Minimum mechanical properties per ASTM A276 / A479, solution annealed
| Grade | UNS | W. Nr. | PREN | YS min MPa | TS min MPa | El. min % | Key chemistry (nominal wt%) |
|---|---|---|---|---|---|---|---|
| Duplex 2205 | S32205 | 1.4462 | ≥35 | 450 | 655 | 25 | Cr 22–23 · Ni 4.5–6.5 · Mo 3–3.5 · N 0.14–0.20 |
| Super Duplex 2507 | S32750 | 1.4410 | ≥43 | 550 | 800 | 15 | Cr 24–26 · Ni 6–8 · Mo 3–5 · N 0.24–0.32 |
| Zeron 100 | S32760 | 1.4501 | ≥40 | 550 | 750 | 25 | Cr 24–26 · Ni 6–8 · Mo 3–4 · W 0.5–1 · Cu 0.5–1 · N 0.2–0.3 |
Reference only. PREN = %Cr + 3.3×(%Mo + 0.5×%W) + 16×%N, calculated from the actual heat chemistry on the 3.1 certificate — not from nominal values. Confirm solution-annealing condition, ferrite content (typically 40–60%) and any required corrosion testing (e.g. ASTM A923 / G48) on the purchase order.
Release checks: For duplex and super duplex grades, heat treatment condition, ferrite content and PREN calculation are confirmed before release. Incorrect condition or undocumented testing can create avoidable corrosion risk.
Supply Forms
Forms supplied
Available forms subject to grade and stock confirmation. Contact us with your specific requirement.
Application Fit
Industries mapped to material families
Applications are shown alongside product families so buyers can connect alloy selection with common service conditions and release checks.
Oil and gas equipment
Wellhead, downhole, subsea and process equipment requiring CRA selection, sour-service awareness and traceability.
Inconel 718 NACESuper Duplex 2507Monel K500
Chemical and petrochemical
Process equipment exposed to acids, caustics, chlorides and mixed chemical streams.
Hastelloy C276Inconel 825Monel 400Duplex 2205
Marine and offshore
Seawater, brine, desalination and offshore hardware where chloride corrosion resistance is central to the specification.
Super Duplex 2507Duplex 2205Zeron 100Monel 400
Power and thermal processing
Furnace hardware, heat-treatment fixtures and hot process components requiring oxidation resistance and strength retention.
Hastelloy XInconel 625Inconel 718Stellite alloys
Pumps, compressors and OEMs
Shafts, sleeves, impellers, seal faces and wear parts where corrosion resistance and mechanical stability both matter.
Inconel 718Stellite 6Super Duplex 2507Hastelloy C276
Procurement details: Lead time, MOQ, Incoterms, payment terms, TPI and vendor onboarding details are covered on the Procurement page.
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