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Hastelloy is a trademarked name for a group of corrosion-resistant metal alloys primarily composed of nickel, often combined with molybdenum, chromium, iron, and other elements. These alloys are widely used in harsh environments where resistance to acids, oxidizing agents, and stress corrosion cracking is essential. In sanitary applications such as pharmaceuticals, food processing, and biotechnology, where purity and corrosion resistance are critical, various Hastelloy grades — including C22, C2000, B2, and B3 — are favored materials.
Hastelloy C22 (UNS N06022) is an extremely versatile alloy known for its exceptional resistance to oxidizing and reducing agents, making it ideal for demanding sanitary environments. It performs well in aggressive media, including chlorides, wet chlorine gas, formic and acetic acids, and ferric and cupric chlorides. Its wide corrosion resistance profile makes it a go-to choice in clean-in-place (CIP) systems and sterile processing lines, where both safety and long-term integrity are crucial.
C2000 (UNS N06200) builds upon the C22 base with the addition of copper, providing superior resistance to sulfuric acid and other strongly reducing environments. C2000 also maintains good resistance to oxidizing environments, making it well-suited for sanitary systems where frequent exposure to sterilizing chemicals or acidic cleaning agents occurs. Its balance of strength and corrosion resistance makes it popular in equipment like reactor vessels, piping, and sanitary fittings.
Hastelloy B2 (UNS N10665) and B3 (UNS N10675) are specially designed to handle strongly reducing media, particularly hydrochloric acid in various concentrations and temperatures. These alloys are less resistant to oxidizing environments compared to C-series alloys, but they excel in niche sanitary processing applications where reducing acids dominate. B3 offers improved thermal stability over B2, which is beneficial in sterilization cycles involving high temperatures. However, due to their sensitivity to oxidizers, they require careful handling and specification.
Specification of Hastelloy C22 C2000 B2 B3 Sanitary
| Alloy | Designation / Origin | Key Alloying Elements (wt %) | Physical & Mechanical Highlights |
|---|---|---|---|
| C‑22 | UNS N06022; W. Nr. 2.4602 | Ni: Balance; Cr: 20–22.5; Mo: 12.5–14.5; W: 2.5–3.5; Fe: 2–6; Co ≤2.5; C ≤0.015; Si ≤0.08; Mn ≤0.5; V ≤0.35; P ≤0.02; S ≤0.02 | Density ~8.69 g/cm³; Melting ~1399 °C; Tensile 690–800 MPa; Yield ~310–407 MPa; Elongation ~57%; Excellent corrosion resistance (oxidizing/reducing media, pitting, weld HAZ) |
| C‑2000 | (Less commonly covered) | Approx: Ni base; Cr ~23; Mo ~16; Cu ~1.6; Co ~2; Si ≤0.08; C ≤0.01 | Enhanced corrosion resistance particularly to sulfuric acid and ferric environments (due to copper addition); otherwise similar mechanical behavior to C‑22. |
| B‑2 | (Hastelloy B‑2) | Ni: ~ Balance to 100%; Mo ~28; Cr ~1; Co ~1; Fe ~2; Mn ~1; C ~0.01 | Known for strong resistance to non-oxidizing acids (e.g., HCl, H₂SO₄) thanks to high Mo content. |
| B‑3 | (Hastelloy B‑3) | Ni: ≥65; Mo ~28.5; Cr ~1.5; Co ≤3; Fe ≤1.5; Mn ≤3; C ≤0.01; Al ~0.5; Ti ~0.2 | Improved weld HAZ resistance due to ultra-low carbon; also specialized for severe reducing environments. |
Sanitary stainless steel refers to stainless steel grades designed specifically for hygiene-sensitive industries like food processing, pharmaceuticals, and biotechnology. These steels typically feature smooth finishes, excellent corrosion resistance, and easy cleaning capabilities. Commonly used grades include 304 and 316 stainless steel, which prevent contamination and withstand frequent washdowns, ensuring product safety and regulatory compliance in sanitary environments.
Chemical Composition of Hastelloy C22 C2000 B2 B3 Sanitary
| Alloy | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P | Others (notable) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C‑22 | ≤ 0.010 % | ≤ 0.50 % | ≤ 0.08 % | ≤ 0.02 % | ≤ 2.50 % | ≥ 50.015 % | 20.00–22.50 % | 2.00–6.00 % | 12.50–14.50 % | ≤ 0.02 % | – |
| C‑2000 | ≤ 0.01 % | ≤ 1.0 % | ≤ 0.08 % | – | ≤ 2.5 % | Remainder | 14.5–16.5 % | 4.0–7.0 % | 15.0–17.0 % | ≤ 0.04 % | Copper ~1.6 % (added for acid resistance) |
| B‑2 | ≤ 0.02 % | ≤ 1.0 % | ≤ 0.1 % | ≤ 0.03 % | ≤ 1.0 % | Balance | ≤ 1.0 % | ≤ 2.0 % | 26–30 % | ≤ 0.04 % | |
| B‑3 | — | ≈ 28.5 % | ≈ 1.5 % | ≈ 1.5 % | ≤ 3.0 % | ≤ 3.0 % | ≤ 0.01 % | ≤ 0.5 |
With a proven track record as a Hastelloy C22 C2000 B2 B3 Sanitary exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 202 tubing worldwide.
Specification of Hastelloy C22 C2000 B2 B3 Sanitary
| Alloy | Designation / Origin | Key Alloying Elements (wt %) | Physical & Mechanical Highlights |
|---|---|---|---|
| C‑22 | UNS N06022; W. Nr. 2.4602 | Ni: Balance; Cr: 20–22.5; Mo: 12.5–14.5; W: 2.5–3.5; Fe: 2–6; Co ≤2.5; C ≤0.015; Si ≤0.08; Mn ≤0.5; V ≤0.35; P ≤0.02; S ≤0.02 | Density ~8.69 g/cm³; Melting ~1399 °C; Tensile 690–800 MPa; Yield ~310–407 MPa; Elongation ~57%; Excellent corrosion resistance (oxidizing/reducing media, pitting, weld HAZ) |
| C‑2000 | (Less commonly covered) | Approx: Ni base; Cr ~23; Mo ~16; Cu ~1.6; Co ~2; Si ≤0.08; C ≤0.01 | Enhanced corrosion resistance particularly to sulfuric acid and ferric environments (due to copper addition); otherwise similar mechanical behavior to C‑22. |
| B‑2 | (Hastelloy B‑2) | Ni: ~ Balance to 100%; Mo ~28; Cr ~1; Co ~1; Fe ~2; Mn ~1; C ~0.01 | Known for strong resistance to non-oxidizing acids (e.g., HCl, H₂SO₄) thanks to high Mo content. |
| B‑3 | (Hastelloy B‑3) | Ni: ≥65; Mo ~28.5; Cr ~1.5; Co ≤3; Fe ≤1.5; Mn ≤3; C ≤0.01; Al ~0.5; Ti ~0.2 | Improved weld HAZ resistance due to ultra-low carbon; also specialized for severe reducing environments. |
🏭 Industry & Application
- ✅ Hastelloy C22 C2000 B2 B3 Sanitary for Medical Industry
- ✅ Hastelloy C22 C2000 B2 B3 Sanitary for Chemical Processing
- ✅ Hastelloy C22 C2000 B2 B3 Sanitary Sanitary Lines
- ✅ Hastelloy C22 C2000 B2 B3 Sanitary for Gas & Liquid Flow
- ✅ Hastelloy C22 C2000 B2 B3 Sanitary for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:Are these Hastelloy alloys suitable for sanitary (hygienic) applications?
Exceptional corrosion resistance Cleanability (smooth surface finish achievable) Weldability with minimal contamination risk Resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC)
Q2:Which alloy is most commonly used in hygienic systems?
Outperforms C‑276 and 316L in aggressive environments Resistant to both oxidizing (e.g., nitric, bleach) and reducing (e.g., hydrochloric, sulfuric) environments Maintains integrity in clean-in-place (CIP) and steam-in-place (SIP) cycles
Q3:Can these alloys be electropolished for ultra-clean surfaces?
Micro-smoothness Corrosion resistance Biofilm resistance Sterilizability.
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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