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NACE-Qualified Corrosion Alloys

Oil, Gas & Petrochemical Nickel Alloy Solutions

From 15,000 psi subsea wellheads to refinery sulfuric acid alkylation units, oil and gas operations punish materials relentlessly. Hangbo Alloy Group supplies NACE-qualified nickel alloys that resist H2S, CO2, chlorides, and sulfidation.

⚠ The Engineering Challenge

Sour gas combines H2S, CO2, chlorides, and high temperatures — a quadruple threat that cracks carbon steel in hours. Deepwater wells at 200°C and 1,000 bar. Material failures cost $10M+ per day in lost production.

Recommended Nickel Alloy Grades

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

Inconel 625
UNS N06625
Subsea wellheads, flowlines, risers, cladding. Industry standard for seawater/sour gas.
-196 to 650°C
Inconel 718
UNS N07718
Wellhead connectors, drill tools, valve stems, fasteners. Age-hardenable high-strength.
-253 to 700°C
Incoloy 825
UNS N08825
Tubing, casing, cladding, heat exchangers. Sour gas and acid resistant.
to 540°C
Hastelloy C-276
UNS N10276
Reactors, heat exchangers, scrubbers, FGD. Universal corrosion resistance.
to 1040°C
Alloy 20
UNS N08020
Sulfuric acid alkylation, pickling tanks, valve bodies. Benchmark for H2SO4.
to 425°C
Nickel 200/201
UNS N02200/N02201
Caustic soda evaporators, HF service. Pure nickel for caustic environments.
to 600°C (201)
Incoloy 945X
UNS N09945
Deep sour gas wellhead equipment. Age-hardenable SSC resistance.
to 300°C
Alloy 28
UNS N08028
OCTG for deep sour wells. PREN >40.
to 450°C

Key Applications

Standards & Specifications

NACE MR0175 / ISO 15156 API 6A API 17D API 5CT ASME B16.5 ASTM B564 ASTM B622 NORSOK M-630

Frequently Asked Questions

What nickel alloys are NACE MR0175 qualified?

Inconel 625, 718 (annealed, HRC≤40), Incoloy 825, Alloy 28, 945X, Monel 400/K-500, Hastelloy C-276, Nickel 201. Hardness limits strictly controlled.

Can you supply API 6A/17D wellhead components?

Forged Inconel 625 and 718 wellhead bodies, bonnets, connectors, seal rings. Pressure ratings 5,000-20,000 psi. PSL 1-3, PR 1-2 available.

What is the lead time for oil and gas alloys?

Standard bar/pipe: 3-4 weeks. Forged wellhead components: 6-10 weeks. Clad pipe: 8-12 weeks. Expedited for shutdowns.

Do you supply weld overlay clad pipe?

Inconel 625 and 825 weld overlay on carbon/low-alloy steel. Automated SAW or GMAW. Bond verified by UT per API 5LD.

What product forms are available?

Seamless pipe (OD 6-650mm), bar (10-500mm), plate (3-80mm), forgings (flanges, wellhead bodies), welding consumables, clad products.

How do you ensure material traceability?

3.1 or 3.2 EN 10204 MTRs with chemistry, properties, NACE hardness, NDT, heat treat. Third-party witness available.

Can you supply HPHT deepwater material?

Inconel 718 to 140 ksi YS, Alloy 945X, Inconel 625 enhanced. API 17TR8 qualified for HPHT design.

What is the MOQ?

Bar/sheet: 100 kg. Pipe: 500 kg or 6m min. Forgings: 100 kg. Welding wire: 25 kg spool. Clad plate: 1 ton.

Do you provide NORSOK M-630 material?

Inconel 625, 825, Duplex 2205 with NORSOK M-630 certificates for offshore Norwegian sector.

Can you supply welding consumables?

Bare wire and covered electrodes for Inconel 625, 718, 825, C-276, Alloy 20. ASME Section IX with PQR/WPS.

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