Inconel 625 Buyer's Guide 2026 - Grades, Welding Filler, Price & Selection Matrix | Shanghai Hangbo Alloy Group
Date: 2026年8月15日 Categories: News Views: 261
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 Should I Know Before Buying Inconel 625?
Inconel 625 (UNS N06625) is a nickel-chromium-molybdenum alloy with niobium that resists pitting, crevice corrosion, and stress-corrosion cracking in seawater, acids, and high-temperature (up to 982C) oxidizing environments. Before purchasing, know three things: (1) it is supplied in annealed (soft, formable), cold-worked (high strength), or solution-annealed (AMS 5599/5666) conditions; (2) matching filler ERNiCrMo-3 is mandatory for corrosion-matching welds; (3) price is approximately 1.5-2.5x 316L but 40-60% less than Hastelloy C-276 — and for most seawater/acetic acid service, 625 is the optimum value. Shanghai Hangbo Alloy Group supplies 625 in bars, tubes, plates, wire, and forgings.
The Inconel 625 Selection Matrix (Quick Decision Table)
| Application | 625 Annealed | 625 Cold-Worked | C-276 | Better Choice |
|---|---|---|---|---|
| Seawater heat exchangers | ✔ | ✔ | ✔ | 625 (value) |
| Acetic acid, 100C | ✔ | ✔ | ✔ | 625 |
| Wet H₂S sour gas | Limited | Limited | ✔ | C-276 |
| High-temp (600-980C) oxidation | ✔ | ✔ | ✔ | 625 (cost) |
| Hot concentrated HCl | ✘ | ✘ | ✔ | C-276 |
| Subsea cladding | ✔ | ✔ | ✔ | 625 (weldability) |
| Springs (high strength) | ✘ | ✔ | ✘ | 625 CW |
Inconel 625 Product Forms & Standards
| Product Form | ASTM/AMS | Size Range |
|---|---|---|
| Round Bar | ASTM B446 / AMS 5666 | Ø6-500 mm |
| Seamless Tube | ASTM B444 / B704 | OD 6-219 mm |
| Plate & Sheet | ASTM B443 / AMS 5599 | 0.5-100 mm |
| Welded Pipe | ASTM B705 | OD to 1219 mm |
| Wire & Filler | AWS A5.14 ERNiCrMo-3 | 0.05-10 mm |
| Forgings | ASTM B564 | Discs, rings, flanges |
Key Chemistry (wt.%): Ni 58 min, Cr 20-23, Mo 8-10, Nb+Ta 3.15-4.15, Fe 5 max.
Welding Inconel 625: The Filler Rule
Critical rule: Use ERNiCrMo-3 (AWS A5.14) for GTAW/GMAW or ENiCrMo-3 for SMAW. Never use 316L or 309 filler — the weld will pit in service.
| Parameter | Recommendation |
|---|---|
| Filler | ERNiCrMo-3 (625-class) |
| Preheat | None required |
| Interpass | <= 100C (keep cool) |
| Heat input | 1.0-2.0 kJ/mm max |
| Shielding | Ar or Ar+He (GTAW) |
| Post-weld HT | None required (annealed) |
Cold-worked (high-strength) 625: Do NOT weld without re-annealing — HAZ will lose strength. Re-anneal at 871-982C after welding.
Price Guide (2026, EXW Shanghai)
| Form | Indicative Price |
|---|---|
| Round Bar Ø25-100 mm | \$32-48/kg |
| Seamless Tube OD 25×2.11 mm | \$45-65/kg |
| Plate 6-25 mm | \$35-55/kg |
| Wire Ø1.6-3.2 mm | \$40-60/kg |
Pricing drivers: LME nickel price (~50% of alloy), cold pilgering passes for tube, and VIM melting requirement for premium grades. Shanghai Hangbo provides LME-indexed quotations within 2 business hours.
Heat Treatment & Condition Guide
| Condition | Treatment | Tensile (MPa) |
|---|---|---|
| Annealed (standard) | 871-982C / WQ or AC | >= 827 |
| Solution Annealed (AMS) | 1093C / WQ | >= 827 |
| Cold-Worked (high strength) | CW + optional age | 1100-1380 |
Why Buy From Shanghai Hangbo?
- In-stock inventory of bars/tubes/plates in all conditions.
- EN 10204 3.1 MTC with full OES chemistry per heat.
- PMI verified on every piece.
- SGS/TUV/BV third-party inspection available.
- 40+ countries shipped via FOB/CIF/DAP.
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
