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Ultimate Corrosion Resistance

Chemical Processing Nickel Alloy Solutions

Chemical plants run reactions that dissolve steel like sugar in water. From 98% sulfuric acid to molten caustic at 500°C, Hangbo Alloy Group supplies the nickel alloys that keep reactors intact, heat exchangers leak-free, and production running 24/7.

⚠ The Engineering Challenge

Chemical processing involves the most aggressive corrosion environments. Sulfuric acid at 150°C, HCl with chlorides, caustic concentration, mixed oxidizing/reducing acids — each demands a specific alloy. Wrong selection leads to failure within weeks.

Recommended Nickel Alloy Grades

Click any grade for complete technical data, properties, and specifications

Hastelloy C-276
UNS N10276
Universal corrosion resistance — reactors, heat exchangers, scrubbers, ducting.
to 1040°C
Hastelloy B-3
UNS N10675
HCl at all concentrations/temperatures. Superior to C-276 in pure HCl.
to 760°C
Hastelloy C-22
UNS N06022
FGD, chlorination, waste incineration. Outperforms C-276 in oxidizing chlorides.
to 1040°C
Alloy 20
UNS N08020
H2SO4 storage, pickling, plating, pharma reactors. Industry standard for sulfuric.
to 425°C
Incoloy 825
UNS N08825
Phosphoric acid evaporators, H2SO4 piping, pickling. Cost-effective moderate service.
to 540°C
Hastelloy C-2000
UNS N06200
Mixed acid, fine chemical reactors. Added copper for oxidizing+reducing media.
to 1040°C
Alloy 28
UNS N08028
Phosphoric acid production, fertilizer plants. High Cr for oxidizing acids.
to 450°C
Nickel 200/201
UNS N02200/N02201
Caustic soda evaporation, HF, chlorine generation. Pure nickel for caustic.
to 600°C (201)

Key Applications

Standards & Specifications

ASTM B619/B626 ASTM B564 ASTM B575 ASME B16.5 ASME Section VIII ASME Section IX NACE MR0175 SEMI F57

Frequently Asked Questions

Which alloy is best for sulfuric acid?

Alloy 20 for concentrated H2SO4 (70-98%) at moderate temps. Hastelloy C-276 for dilute or contaminated H2SO4. B-3 or D-205 for boiling concentrated H2SO4. Contact us for specific conditions.

What alloy for hydrochloric acid?

Hastelloy B-3 for HCl at all concentrations to boiling. C-276 or C-2000 for contaminated HCl with oxidizing species. Nickel 200 for very dilute HCl at ambient.

Can you supply ASME Section VIII certified material?

All plate, bar, pipe, forgings with ASME Section II certification. UG-84 impact data, UCS-66 exemption curves, stress values for code stamping.

Difference between C-276 and C-22?

C-22: higher Cr (22% vs 16%), lower Mo (13% vs 16%) — better in oxidizing chlorides (FGD, incineration). C-276: better in reducing acids. C-2000: adds Cu for broadest resistance.

Can you supply welded pipe and fittings?

Welded pipe (B619) and tube (B626) in C-276, B-3, C-22, C-2000, Alloy 20, 825. Fittings per B16.9, flanges per B16.5. Full solution anneal, 100% radiography.

What is the lead time?

Standard plate/sheet/bar: 2-4 weeks. Welded pipe: 4-6 weeks. Forged fittings: 4-8 weeks. Specialty grades: 6-10 weeks. Expedited for shutdowns.

Do you provide WPS/PQR?

Welding consumables with ASME IX qualified WPS/PQR. Pre-qualified procedures for C-276, B-3, C-22, Alloy 20, 825. PWHT parameters available.

What product forms are available?

Plate (1-80mm), sheet (0.5-3mm), bar (6-300mm), welded & seamless pipe (6-650mm), fittings (1/2-24" NB), flanges (150-1500#), forgings, consumables.

Can you supply semiconductor-grade material?

Electropolished C-22 and C-274 tubing for UHP chemical distribution in semiconductor fabs. SEMI F57 certified. Ra <0.25 µm, cleanroom packaging.

How do you verify corrosion resistance?

ASTM G28 Method A/B data on every heat for C-276, B-3, C-22. Custom immersion testing in client process media. Pitting/crevice per ASTM G48.

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Email: hangbo@nickel-alloy.com  |  Tel/WhatsApp: +86-136-1165-6360