Hastelloy C-22 (UNS N06022) is one of the most oxidation-resistant grades in the Ni-Cr-Mo-W family with 20–22.5% chromium. It performs exceptionally in mixed oxidising/reducing acids, against localised corrosion and at elevated temperature, suiting processes where chemistry fluctuates.
As a manufacturer and global exporter of special alloys since 2012, Shanghai Hangbo Alloy Group Co., Ltd. supplies Hastelloy C-22 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), precision strip (0.02–3.0 mm, ±0.005 mm tolerance), welding wire & coils (1.0–5.0 mm), forgings & rolled rings (up to 7500 kg, 3500 mm OD), flanges & pipe fittings (Class 150–2500, DN15–DN1200) — all with EN 10204 3.1 certified material test reports.
Hastelloy C-22 Chemical Composition (wt%)
| Element | Content (wt%) | Element | Content (wt%) |
|---|---|---|---|
| Ni (镍) | Balance | Co (钴) | ≤ 2.50 |
| Cr (铬) | 20.0–22.5 | V (钒) | ≤ 0.35 |
| Mo (钼) | 12.5–14.5 | C (碳) | ≤ 0.015 |
| W (钨) | 2.5–3.5 | Si (硅) | ≤ 0.08 |
| Fe (铁) | 2.0–6.0 | Mn (锰) | ≤ 0.50 |
Hastelloy C-22 Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength (Rm) | ≥ 690 MPa |
| Yield strength (Rp0.2) | ≥ 310 MPa |
| Elongation (A) | ≥ 45 % |
| Hardness | ≤ 200 HB |
| Density | 8.69 g/cm³ |
| Melting range | 1357–1399 °C |
| Thermal conductivity | 10.1 W/m·K |
| Young's modulus | 206 GPa |
| Max service temperature | 1035 °C |
Key Advantages
- Higher chromium than C-276 gives better oxidising and mixed-acid resistance
- PREN around 65 — extremely high pitting and crevice resistance
- Good thermal stability; resists harmful phase precipitation after welding or hot forming
- Handles wet chlorine, chlorine dioxide and oxidising salt solutions
Relevant Standards
- ASTM B574
- ASTM B575
- ASTM B622
- ASTM B564
- NACE MR0175 / ISO 15156
- UNS N06022
Typical Applications
- FGD systems and flue-gas scrubbers
- Mixed acid (nitric/hydrofluoric) pickling lines
- Nuclear waste treatment and fuel reprocessing
- Agrochemical and fine-chemical reactors
- Pharmaceutical equipment and clean piping
Why Buy from Hangbo Alloy?
- Factory-direct manufacturer — founded 2012, headquartered in Shanghai Qingpu
- Full product range — bar, plate, sheet, strip, tube, forging, welding wire, flanges and machined parts
- Certified quality — ISO 9001:2015, GB/T 19001-2016, GJB 9001C-2017, EN 10204 3.1 mill test certificates with third-party inspection (SGS / BV / TUV) available on request
- Complete mill documentation — chemical analysis, mechanical test, ultrasonic test (UT), hardness and grain-size reports with every shipment
Contact Us — Shanghai Hangbo Alloy Group Co., Ltd.
Shanghai Hangbo Alloy Group Co., Ltd.
📍 No. 388 Songhuang Road, Qingpu District, Shanghai, China
📞 Tel / WhatsApp: +86 15618279078
✉️ Email: demi@nickel-alloy.com
🕒 Available 24 hours a day, 7 days a week — enquiries answered around the clock.
Send your drawing or enquiry (grade, form, size, quantity, standard) for a same-day quotation.
Frequently asked questions
What is the PREN of Hastelloy C-22?
Using PREN = %Cr + 3.3×(%Mo + 0.5×%W) + 16×%N with Cr 21%, Mo 13% and W 3% gives roughly 21 + 3.3×14.5 ≈ 69. With the simplified formula, engineering values land around 64–69 — comfortably above Inconel 625 (about 51) and comparable to or slightly above C-276.
What forms and sizes are available?
We supply Hastelloy C-22 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), precision strip (0.02–3.0 mm, ±0.005 mm tolerance), welding wire & coils (1.0–5.0 mm), forgings & rolled rings (up to 7500 kg, 3500 mm OD), flanges & pipe fittings (Class 150–2500, DN15–DN1200). Custom lengths, tolerances and machining to drawing are available on request.
What is the MOQ and lead time?
MOQ is flexible — trial orders from a single piece are welcome. Stock sizes ship in 3–7 days; custom forgings and machined parts typically 15–35 days depending on quantity and process.
Can you provide third-party inspection and shipping to my port?
Yes. SGS / BV / TUV or your nominated inspector can witness all tests before shipment. Full export documentation is provided, and we ship worldwide by sea or air on FOB, CIF or DDP terms.