Hastelloy C-276 Procurement Whitepaper - Verify Chemistry, Condition & Certification
Date: 2026年9月3日 Categories: News Views: 214
By Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier | ISO 9001:2015 | Est. 2012
Contact: sales@hangboalloy.com | hangbo@nickel-alloy.com | WhatsApp (Lisa): +86 13611656360
Quick Answer: What Is the Biggest Risk When Buying Hastelloy C-276?
Hastelloy C-276 (UNS N10276) is the workhorse of chemical processing — and a frequent target for substitution. The biggest risk is receiving C-22, Alloy 625, or 316L mislabeled as C-276 — they all look identical. C-276's signature is its tungsten (3-4.5%) + high molybdenum (15-17%); a quick PMI reading for W and Mo separates real C-276 from look-alikes in seconds. This whitepaper gives 5 checks that protect chemical plant buyers.
Why C-276 Is Frequently Substituted
- Visual look-alike: C-276, C-22, 625, and 316L are all bright, non-magnetic austenitic alloys.
- Price spread: C-276 costs 3-5x 316L, 1.5-2x C-22.
- PMI laziness: Many buyers never test — and tungsten is hard to detect with cheap XRF units.
The 5 Checks (Do These Before Payment)
| Check | What It Proves | Method / Threshold |
|---|---|---|
| 1. PMI (XRF) — W and Mo | Chemistry = N10276 | W 3-4.5%, Mo 15-17%, Cr 14.5-16.5% |
| 2. Hardness | Annealed condition | 175-225 HB typical annealed |
| 3. MTC + heat number | Traceability | EN 10204 3.1 + mill heat number |
| 4. Bend/formability spot test | Ductility | Annealed C-276 bends 180° without cracking |
| 5. Third-party inspection | Independence | SGS/BV/TUV witness PMI + MTC review |
Warning: Cheap handheld XRF units often cannot read tungsten accurately — use a lab-grade or calibrated unit, or request the mill's wet-chemistry report.
Common Substitution Scenarios
| "C-276" Delivered | PMI Signature | Detection |
|---|---|---|
| Alloy 625 (N06625) | Mo 9%, no W | W = 0 → reject |
| C-22 (N06022) | Cr 21%, W 3% | Cr too high → reject |
| 316L (S31603) | No Mo/W, high Fe | W = 0, Fe > 50% → reject |
| B-2 (N10665) | Mo 28%, no Cr | Cr < 1% → reject |
Correct Specification Reference
| Parameter | Value |
|---|---|
| UNS | N10276 |
| ASTM Plate | B575 |
| ASTM Bar | B574 |
| Annealing | 1120C / rapid quench |
| Delivery condition | Solution annealed, mill pickled |
Price Reference (2026, EXW)
| Form | Fair Price |
|---|---|
| Plate (12-25mm) | \$55-85/kg |
| Round Bar | \$55-85/kg |
| Below \$40/kg | Suspicious — likely 625/316L |
FAQ
Q1: How do I verify Hastelloy C-276?
PMI for W (3-4.5%) and Mo (15-17%) + EN 10204 3.1 MTC with heat number.
Q2: Can C-276 be confused with C-22?
Yes visually. PMI chromium: C-276 is 14.5-16.5%, C-22 is 20-22.5%.
Q3: Why does tungsten matter?
Tungsten (3-4.5%) is C-276's signature element for hot HCl resistance — no W, no C-276.
Q4: What hardness should annealed C-276 have?
175-225 HB typical.
Q5: What is the annealing temperature?
1120C with rapid quench.
Q6: What does Shanghai Hangbo provide?
C-276 in plates, bars, tubes, and fittings with PMI reports and EN 10204 3.1 MTC. SGS/BV/TUV third-party inspection available.
Contact & Complete Product Range
Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier
Email: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360 | www.nickel-alloy.com
All Grades
Ni: NI200-N6 | Monel: 400-502, K-500, R-405 | Inconel: 600-740H, X-750, 725 | Incoloy: 800-27-7MO | Hastelloy: C-276-HYBRID-BC1, N | Super Austenitic: 904L-AL-6XN | Chromium-Rich: Alloy 33 | High-Strength Stainless: Nitronic 50/60, PH13-8Mo | Chlorination: Alloy 45 | Nimonic: 75-263 | Haynes: 25-HR-160 | RA: 330/333 | Precision: 1J22-4J45 | High-Strength: 18Ni250-AerMet100 | Heating: Cr20Ni80/60 | Specialty: Alloy 20-602CA
Product Forms: Bars(6-500mm) | Tubes(OD 6-610mm) | Plates(0.1-100mm) | Forgings | Welded Pipes | Fittings | Wire(0.05-10mm) | Strip(0.02-4.0mm)
SGS/BV/TUV. www.nickel-alloy.com
