Material system and composition characteristics

- Core grades:

- C series: such as C-276 (Ni-Cr-Mo-W), C-22, resistant to oxidizing/reducing acid and chloride ion corrosion;

- B series: such as B-3 (Ni-Mo), focusing on resistance to non-oxidizing acids such as hydrochloric acid and sulfuric acid;

- G series: such as G-35 (Ni-Cr-Mo-Cu), resistant to phosphoric acid and fluorine-containing media corrosion.

- Composition advantages:

- C-276 contains 16% Mo + 5% W, and has outstanding resistance to wet chlorine and hypochlorite pitting corrosion;

- B-3 has a 28% Mo content and is resistant to 70% hydrochloric acid corrosion at room temperature.

Performance advantages

1. Corrosion resistance

- Strong corrosive media resistance:

- Resistance to boiling 65% nitric acid and 50% sulfuric acid corrosion rate <0.1mm/year;

- Stress corrosion cracking (SCC) resistance in seawater, salt spray and Cl⁻-containing media, pitting potential >1.2V (vs SCE).

2. Mechanical and processing properties

- High strength and toughness:

- Room temperature tensile strength ≥730MPa, elongation ≥40%, can be cold-bent;

- Excellent oxidation resistance at high temperature (500℃~1000℃), C-276 weight gain in air oxidation at 1200℃ <0.5mg/cm².

- Processing adaptability:

- Cold-rolled hardness ≤220HB, can be stamped, coiled or precision sheared, suitable for manufacturing complex thin-walled parts;

- Good weldability, can be welded by argon arc welding (TIG), no risk of intergranular corrosion after welding

Specifications and manufacturing process

1. Size range

- Thickness: 0.05mm~3mm (foil to strip);

- Width: 5mm~600mm, length is divided into coils as needed (maximum coil weight can reach 2000kg);

- Surface state: cold-rolled annealing (2B), bright annealing (BA), mirror polishing, roughness Ra≤0.8μm.

2. Production process

- Smelting: vacuum induction furnace (VIM) + electroslag remelting (ESR), control S, P impurities ≤0.01%;

- Rolling: precision rolling on multi-roll cold rolling mill, solution treatment at 1150℃~1200℃, grain refinement and stress elimination;

- Inspection: ultrasonic flaw detection (UT), intergranular corrosion test (ASTM G28), thickness tolerance control (±0.01mm).

3. Implementation standards

- American standard: ASTM B575, ASME SB-575;

- National standard: GB/T 21433 (corrosion-resistant alloy strip).

Application scenarios

1. Chemical and petrochemical

- Sealing gasket (C-276 strip): used for pipe flange sealing containing hydrochloric acid and chlorine;

- Catalyst mesh belt (C-22 strip): resistant to corrosion by strong acid catalytic reaction media;

- Bellows (B-3 strip): resistant to medium erosion in sulfuric acid alkylation units.

2. Electronics and semiconductors

- Chip packaging frame (C-276 strip): resistant to corrosion by etching solutions (such as hydrofluoric acid), stable conductivity;

- Battery electrode coating: resistant to electrolyte corrosion, improving the life of energy storage equipment.

3. Energy and Environmental Protection

- Flue Gas Desulfurization (FGD) Device Filter: Resistant to Wet SO₂+Cl⁻ Corrosion;

- Nuclear Waste Treatment Container Coating (C-276 Tape): Anti-radiation and Acidic Medium Penetration;

- Geothermal Wellhead Sealing Tape: Resistant to H₂S and CO₂ Fluids Above 200°C.

4. Precision Instruments

- Sensor Diaphragm (C-22 Tape): Maintains Dimensional Stability in Strong Acid and Alkaline Environments;

- Medical Device Components: Resistant to Body Fluid Corrosion and Meets Biocompatibility Requirements (such as Implantable Device Seals).

Product Advantages

Hastelloy Strip is characterized by "ultra-thin specifications + high-precision processing". It can replace stainless steel in extremely corrosive environments and can achieve micron-level thickness 

control through precision rolling. Its rolled form facilitates automated production and is suitable for scenes such as sealing, coating, and electronic components. It is a key basic material in the field 

of high-end corrosion resistance.