Incoloy 825 Procurement Whitepaper
Date: 2026年9月16日 Categories: News Views: 373
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 Incoloy 825?
Incoloy 825 (UNS N08825) is a titanium-stabilized nickel-iron-chromium alloy used for sulfuric and phosphoric acid service. Its most frequent substitutes are 904L and 316L — both are cheaper and visually similar. What separates 825 is its copper (1.5-3.0%) plus titanium (0.6-1.2%) addition on a high-nickel base (~42%). A PMI reading that shows copper and titanium confirms 825; stainless substitutes show neither. This whitepaper gives 5 checks.
Why Incoloy 825 Is Substituted
- Price gap: 825 costs 3-5x 316L and about 1.5x 904L.
- Visual identity: Bright, non-magnetic, standard mill finishes.
- Specification drift: Buyers ordering "825 equivalent" may receive a lesser grade.
- Ti is rarely checked: Titanium stabilization is 825's signature, yet many inspections skip it.
The 5 Checks (Do These Before Payment)
| Check | What It Proves | Method / Threshold |
|---|---|---|
| 1. PMI for Cu + Ti | Chemistry = N08825 | Cu 1.5-3.0%, Ti 0.6-1.2% |
| 2. Nickel content | Correct alloy family | Ni 38-46% |
| 3. MTC + heat number | Traceability | EN 10204 3.1 + mill heat number, ASTM B424/B425 |
| 4. Condition check | Annealed delivery | 150-200 HB typical |
| 5. Third-party inspection | Independence | SGS/BV/TUV witness PMI + certificate review |
Common Substitution Scenarios
| "Incoloy 825" Delivered | PMI Signature | Detection |
|---|---|---|
| 904L (N08904) | Cu 1-2%, no Ti | No titanium → reject |
| 316L (S31603) | Ni ~12%, no Cu/Ti | Ni too low → reject |
| 800H (N08810) | No Cu, no Mo | No Cu/Ti → reject |
| 20Cb-3 (N08020) | Nb present, Cu 3-4% | Nb + different balance → reject |
Specification Reference
| Form | Standard |
|---|---|
| Plate/Sheet/Strip | ASTM B424 |
| Bar & Rod | ASTM B425 |
| Tube | ASTM B423 |
| Annealing | 930-1000C |
Price Reference (2026, EXW)
| Form | Fair Price |
|---|---|
| Plate | \$22-34/kg |
| Round Bar | \$20-32/kg |
| Tube | \$28-42/kg |
| Below \$16/kg | Suspicious — likely 316L/904L |
FAQ
Q1: How do I verify Incoloy 825?
PMI showing Cu 1.5-3.0% and Ti 0.6-1.2% with Ni 38-46%, plus EN 10204 3.1 MTC.
Q2: Can 904L be sold as Incoloy 825?
They are close in copper content, but 904L has no titanium — that is the giveaway.
Q3: Why is titanium added to 825?
Ti stabilizes carbon, preventing sensitization and intergranular corrosion after welding.
Q4: What standard applies to plate?
ASTM B424 / ASME SB424.
Q5: What hardness should annealed 825 have?
Typically 150-200 HB.
Q6: Which acids does 825 resist?
Sulfuric and phosphoric acid, plus many oxidizing/reducing mixed acid environments.
Q7: What does Shanghai Hangbo provide?
Incoloy 825 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
