Valve Material Reference
ASTM A494 M35-1 Valve
Cast Monel M35-1 (Nickel-Copper Alloy)ASTM A494 Grade M35-1 is the cast nickel-copper alloy (Monel) used for valve bodies and pressure-retaining castings in hydrofluoric acid (HF), saltwater, and reducing acid applications.
Form
Cast
Max Temp
+482°C (+900°F)
Min Temp
−73°C (−100°F)
Category
Nickel Alloy
What is ASTM A494 M35-1?
ASTM A494 M35-1 (Cast Monel M35-1 (Nickel-Copper Alloy)) is a nickel alloy valve material. ASTM A494 Grade M35-1 is the cast nickel-copper alloy (Monel) used for valve bodies and pressure-retaining castings in hydrofluoric acid (HF), saltwater, and reducing acid applications. Temperature range: −73°C to +482°C (−100°F to +900°F).
- Form:
- cast
- Max Temp:
- +482°C (+900°F)
- Min Temp:
- −73°C (−100°F)
Chemical Composition - ASTM A494 M35-1
Temperature Range
−73°C to +482°C (−100°F to +900°F)
Maximum Temperature
+482°C (+900°F)
Minimum Temperature
−73°C (−100°F)
Vajra Industrial Solutions manufactures and supplies valves in ASTM A494 M35-1 (Cast Monel M35-1 (Nickel-Copper Alloy)) for hf alkylation (stratco / equistar process) - monel m35-1 is mandatory for valve bodies, stems, and trim in contact with hf, with EN 10204 3.1 material traceability on every order.
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Equivalent Grades - ASTM A494 M35-1
| Standard | Equivalent Grade |
|---|---|
| ASTM | A494 M35-1 (cast) / B164 Monel 400 (wrought bar) |
| UNS | N04500 (approximate cast equivalent) |
| Tradename | Monel M35-1 (Huntington / Special Metals) |
Suitable Services
HF alkylation (STRATCO / Equistar process) - Monel M35-1 is mandatory for valve bodies, stems, and trim in contact with HF
Offshore seawater cooling - saltwater corrosion resistance, better than duplex in low-velocity seawater
Hydrochloric acid service - reducing acid below oxidising threshold
Sodium hydroxide (caustic) service - superior to stainless in hot concentrated caustic
Brine and salt processing - evaporators, crystallisers, valve isolation
Not Suitable For
Oxidising acids (nitric acid, hot concentrated H₂SO₄) - Hastelloy C-276 preferred
High-temperature above 482°C - mechanical strength falls; use Inconel 625 or 718
Aerated HF - can cause stress corrosion cracking; specific deaeration may be required
Valve Body Applications
HF alkylation unit valve bodies - hydrofluoric acid at all concentrations (key refinery material)
Seawater service valve bodies - offshore platforms, marine ballast, cooling water
Reducing acid valve bodies - sulfuric, hydrochloric (below aeration threshold)
Caustic (NaOH) service valve bodies - where chloride contamination is present
Trim Applications
Seat rings and plug trim for corrosion-resistant valve trim in HF service
Stems and packing glands in Monel ball and gate valves
Typical Valve Types in ASTM A494 M35-1
Ball valves
Gate valves
Globe valves
Check valves
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Need ASTM A494 M35-1 Valves?
We supply ASTM A494 M35-1 (Cast Monel M35-1 (Nickel-Copper Alloy)) valves with full certification documentation — EN 10204 3.1/3.2 MTCs and hydrotest certs as standard.