Hastelloy C276 Products — Hastelloy C-276

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Проверено и поддерживается инженерной командой Shaanxi Qianyi Tuoda Technology Co., Ltd.

Hastelloy C276 Products — Hastelloy C-276 镍合金产品

When the medium is aggressively acidic — hydrochloric, sulfuric, or wet chlorine — and it swings between oxidising and reducing, Hastelloy C276 (UNS N10276) is the nickel-molybdenum-chromium alloy most plants reach for. Its ~16% molybdenum with chromium gives broad immunity to pitting, crevice and uniform attack across a wide acid range, and it welds without post-weld heat treatment. We stock tube, plate, bar, wire, fittings and flange in Baoji with full MTC. This guide covers what C276 beats, which ASTM fits each form, where it still fails, and how to RFQ it.

The reason a product guide beats a catalogue is simple: the seven nickel families (tube, plate, bar, wire, fittings, flange, fasteners) are not independent. A corrosive line is plate shells, tube bundles, bar-made shafts and fittings from one grade system — specifying them consistently is what keeps a plant leak-free for decades. Below, this alloy gets its own section, then the shared failure map and one selection rule. For the other alloys see our nickel alloy nickel alloy hub.

At a Glance: Hastelloy C276 Products

1. What Hastelloy C-276 镍合金产品 Actually Is (and Why Buyers Confuse It)

Hastelloy C276 is a low-carbon nickel-molybdenum-chromium-tungsten alloy (about 57% nickel, 16% molybdenum, 16% chromium, 4% tungsten). That molybdenum-chromium matrix is what makes it resist both reducing acids (hydrochloric, de-aerated sulfuric) and oxidising ones (wet chlorine, nitric-sulfuric mixes), and the low carbon avoids intergranular attack after welding. We treat C276 like the rest of the nickel family — tube, fittings and flange planned from one grade system.

2. Grade Quick-Reference — Hastelloy C276 (N10276)

For the full nickel-family picture — Inconel, Hastelloy, Monel, Incoloy, Alloy 20 side by side — see our alloy matrix alloy fabrication matrix. If you also run titanium lines, our titanium titanium guide explains where each metal owns the service.

3. How to Read a Hastelloy C276 Products RFQ

A usable quote starts with a usable request. Put these on the enquiry so we return price and lead time instead of questions:

• Grade — C276 (confirm C22 if oxidising-acid heavy).
• Spec — B622 (tube), B575 (plate), B574 (bar), B366 (fittings), B564 (flange).
• Size — OD / thickness / length / diameter, quantity.
• Condition — solution-annealed; tolerance class.
• Ends — plain, bevelled, or forged flange.
• Certificate — EN 10204 3.1 MTC with heat number.
• Service — medium, concentration, temperature, oxidising vs reducing.
• Packing — VCI, crate, port.

4. Hastelloy C276 Products Forms, Sizes & What to Specify

5. Standard & Certification You Receive

Every lot ships with an EN 10204 3.1 mill test certificate, heat-number traceable to the melt, to ASTM B575/B622/B574 as applicable. Condition is solution-annealed per spec, and PMI or UT can be added on the order. For fabrications we kit the matching fittings and flange from one shipment so grade and certificate stay matched.

6. The “One Alloy Solves Everything” Myth

C276 is not universal: it struggles in very strong oxidising media (concentrated boiling nitric) and free fluorine, and it is overkill (and expensive) for mild service where titanium or 316L suffice. For oxidising-acid-heavy duty step to Hastelloy C-22. Specify the alloy for the actual medium.

7. Where Hastelloy C276 Products DOES Fail — Limitation & Failure Conditions

C276 limits follow the chemistry: superb across most acids, weaker only in the most aggressive oxidisers and in fluoride. Read the shared high-nickel failure map, then the alloy-specific notes.

Two joint-specific notes. Pick the gasket for the actual medium, and avoid coupling the nickel alloy directly to a much nobler metal (graphite, platinum, passive titanium in oxidising service) without isolation — it can become the anode. Where the service is oxidising or mixed acid, step to Hastelloy C-276 or C-22 rather than pushing the alloy past its limit.

8. Choose by Service, Not by Habit

Choose this if:

• Hydrochloric acid (aerated or not), sulfuric broad range → C276.
• Wet chlorine, hypochlorite, mixed oxid+red → C276.
• Phosphoric, acetic, formic → C276.

Choose that if:

• Oxidising acid dominant (HNO3 + chlorine) → Hastelloy C-22.
• Seawater + high strength → Inconel 625.
• Mild, room-temperature duty → titanium / 316L.
• Fluorine / HF service → Monel 400, not C276.

9. Common Procurement Mistakes

• Using C276 in concentrated boiling nitric — C22 is better there.
• Using C276 for mild duty — wastes budget; use titanium/316L.
• Wrong filler (must be ERNiCrMo-4) — use the matched wire.
• No MTC on a pressure part — non-compliant at audit.

10. Lead Time, MOQ & Export Packing

C276 is held in Baoji across tube, plate, bar, wire, fittings and flange, cut to size and dispatched fast for standard sizes. Heavy-wall tube, large forged flange or special tempers lead a few weeks. Small MOQ applies — a single spool, one plate or a set of flanges is a normal order, and we kit the whole line from one Baoji shipment.

11. Alloy vs the Alternatives — When NOT to Specify This Alloy

12. Welding & Joining Note

These nickel alloys weld readily by GTAW / GMAW / SMAW, but the stubborn oxide must be cleaned first or fusion fails, and welding wire must be kept dry to avoid porosity. For this family specify filler ERNiCrMo-4, weldable without post-weld heat treatment; follow a qualified WPS with argon back-purge on tube and pipe, and we supply the matching wire and forming notes so the weld stays in grade. Always confirm the filler matches the base grade on the RFQ.

13. Reading the Mill Test Certificate

Every lot ships with an EN 10204 3.1 EN 10204 3.1 MTC: grade and UNS, heat number, chemistry, tensile result, and the ASTM specification. Keep the heat number — it is your traceability link from the finished part back to the melt, and it is what lets an auditor confirm the grade years later. For project work ask for PMI or UT on the order so the certificate matches the actual piece.

14. Why a Baoji Titanium-Valley Stockist

We hold nickel alloys and titanium together in Baoji Baoji, close to China’s Titanium Valley supply base, which means we can cut, forge and kit a mixed line from one shipment instead of chasing several mills. That shortens lead time from mill-weeks to days and keeps one grade logic, one certificate pack, and one point of contact for your whole order. Our nickel buying guide explains the stock-holder model for overseas buyers.

15. A 5-Minute RFQ Template

Copy this into your enquiry and fill the blanks — it returns a quote, not a guessing game:

• Product: Hastelloy C276 Products, grade ___
• Spec: ___ (ASTM / ASME)
• Size: ___ ; quantity ___
• Condition / finish: ___
• Certificate: EN 10204 3.1, UT/PMT if needed
• Service: medium ___, concentration ___, temperature ___, pressure ___
• Destination & packing: port ___, VCI / crate

Email it to [email protected] — we confirm stock and pricing within 24 hours, and can kit the whole line from one Baoji shipment so grade and certificate stay consistent end to end.

16. FAQ — Hastelloy C276 Products

When should I choose C276 over C22?

For straight reducing acid (hydrochloric, de-aerated sulfuric) C276 is comparable to C22 and often cheaper; choose C22 when the service is oxidising or a mix of oxidising and reducing acids.

Does Hastelloy C276 resist hydrochloric acid?

Yes. C276 resists HCl across a wide concentration and temperature range, including aerated conditions, which is one of its flagship services.

What ASTM applies to C276 plate versus tube?

B575 for plate and sheet, B622 for seamless tube (B619 for welded), B574 for bar, B366 for fittings and B564 for forged flange.

Why is C276 used in wet chlorine service?

Its molybdenum-chromium matrix resists wet chlorine and hypochlorite where most metals attack; it is a standard choice for scrubbers and bleach lines.

What welding filler and heat treatment?

Use ERNiCrMo-4; C276 is weldable without post-weld heat treatment because of its low carbon, but clean the oxide and keep wire dry.

What certificate comes with the order?

EN 10204 3.1 MTC, heat-number traceable to the melt, to the relevant ASTM grade; PMI/UT on request.

Do you export worldwide?

Yes. Baoji stock to global ports, with VCI protection, crating and full MTC and shipping documents.

Summary: One Rule Beats a Catalogue

If you take one thing from this guide, take this: specify the alloy for the fluid, not just the word “nickel alloy,” and treat every joint as a system. Hastelloy C276 Products is the right call for its service window — and never specify it where the limitation map says no. Send the checklist above to [email protected] or use the inquiry form — we confirm stock and pricing within 24 hours, and can kit plate, tube, bar, wire, fittings, flange and fasteners for your whole line from one Baoji shipment.