Alloy 20 Instrumentation Fittings in imperial and metric sizes to ASTM B366 / ASME SB 366. Get quotes from verified suppliers on MetalMitra.
- Alloy 20 Instrumentation Fittings
- Alloy 20
- Seamless Tubing
- Compression Fittings
- Needle Valves
- Manifolds
- High Pressure
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Specifications
| Dimensions | DIN, ASTM, ASME, BS and all International Standards |
|---|---|
| Specifications | ASTM B366 / ASME SB 366 |
| Grade | Alloy 20 – UNS N08020 ) |
| Size Range | 1/8" to 2" and 2mm to 32mm tube diameter |
| Working Pressure | up to 6,000psi (based on severity of application) |
| Available Thread | NPT(ANSI B1.20.1), and ISO thread configurations (BSPT, BSPP) |
Grades & standards
- Alloy 20
Chemical composition & mechanical properties
| Ni | Cr | Mo | Cu | Nb | C | Fe |
|---|---|---|---|---|---|---|
| 32.0–38.0 | 19.0–21.0 | 2.0–3.0 | 3.0–4.0 | 8×C – 1.00 | 0.07 | balance |
Single values are maximums unless marked min. Values per ASTM B463 / B464; always confirm against the purchase specification and the mill test certificate.
Source Alloy 20 Instrumentation Fittings from verified mills, manufacturers and stockists on MetalMitra. Options span imperial and metric sizes, produced to ASTM B366 / ASME SB 366, and every order can ship with an EN 10204 3.1 certificate.
Alloy 20 Instrumentation Fittings include seamless and welded instrumentation tubes together with compression fittings, connectors and valves used to carry process fluids and signals safely to instruments.
Alloy 20 (UNS N08020) was developed specifically to stand up to sulphuric acid. Alloy 20 (UNS N08020) is a niobium-stabilized nickel-iron-chromium alloy with copper and molybdenum, developed for excellent resistance to sulphuric acid and other aggressive chemical environments.
What you can source
- Instrumentation Tubing — Seamless and welded tubes for impulse and process lines.
- Compression Fittings — Single and double ferrule tube fittings.
- Needle & Ball Valves — Isolation and flow control for instrument lines.
- Manifolds & Accessories — 2, 3 and 5-way manifolds and tube accessories.
Key properties
- Sulphuric Acid Resistance — Developed specifically for sulphuric acid service.
- Stress Corrosion Resistance — Good resistance to chloride stress corrosion cracking.
- Niobium Stabilized — Reduced risk of carbide precipitation during welding.
- Good Fabricability — Forms, machines and welds without fuss.
Applications & industries
- Chemical Processing
- Sulphuric Acid Plants
- Pharmaceutical
- Petrochemical
- Pickling Equipment
- Food Processing
- Synthetic Fibre Plants
- Heat Exchangers
- Process Piping
- Storage Tanks
- Fabrication
- General Engineering
Testing & documentation
Inspection and documentation for Alloy 20 Instrumentation Fittings follow the applicable standard plus any extra requirements in your PO.
- Dimensional inspection
- Visual & surface inspection
- Grade verification against the order
- Hydrostatic / pneumatic testing as applicable
- Eddy current testing for tubing as applicable
- Positive Material Identification (PMI)
- EN 10204 3.1 Mill Test Certificate
- Project-specific documentation on request
Why source on MetalMitra
- Checked sellers only — Every supplier profile is screened by MetalMitra before it goes live.
- Faster sourcing — Post one requirement and receive competitive offers without chasing calls.
- Paperwork sorted — MTC 3.1, test reports and TPI arranged as your project demands.
- Global logistics — Seaworthy packing and dispatch to project sites across the world.
Request pricing
Post an RFQ for Alloy 20 Instrumentation Fittings with your drawing or specification and receive quotes from verified suppliers.
Technical note: Figures shown are indicative. Final acceptance should be based on the applicable standard, approved drawings and the MTC supplied with the material.
Applications & industries
- Chemical Processing
- Sulphuric Acid Plants
- Pharmaceutical
- Petrochemical
- Pickling Equipment
- Food Processing
- Synthetic Fibre Plants
- Heat Exchangers
- Process Piping
- Storage Tanks
- Fabrication
- General Engineering
- Petrochemical & Refining
- Chemical Processing
- Pharmaceutical
- Food & Dairy
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
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