/>
Alloy Family Index

Hastelloy Alloys: Grades, Properties & Applications

Hastelloy is a family of nickel-based corrosion-resistant alloys (Ni-Cr-Mo, Ni-Mo and Ni-Cr-Mo-Cu) designed for aggressive chemical process environments.

Quick Answer

What are Hastelloy alloys?

Hastelloy is a family of nickel-based corrosion-resistant alloys (Ni-Cr-Mo, Ni-Mo and Ni-Cr-Mo-Cu) designed for aggressive chemical process environments. This index lists 17 technical articles covering composition, mechanical properties, temperature limits, corrosion behaviour and welding practice for each grade.

What is Hastelloy?

Hastelloy is a family of nickel-based corrosion-resistant alloys (Ni-Cr-Mo, Ni-Mo and Ni-Cr-Mo-Cu) designed for aggressive chemical process environments. Hangbo Alloy Group stocks and supplies these grades in round bar, seamless tube, plate, sheet, precision strip, forging, wire and machined-part forms, with mill test certificates to EN 10204 3.1 / 3.2.

Which Hastelloy grades are covered?

GradeUNSTypeSummary
Hastelloy B-2: Hydrochloric Acid Resistance & Chemical ProcessingUNS N10665Grade guideComplete technical guide to Hastelloy B-2 (UNS N10665 / W.Nr. 2.4617). Nickel-molybdenum alloy with exceptional resistance to hydrochloric acid at...
Hastelloy B-3: Hydrochloric Acid Resistance & Chemical ProcessingUNS N10675Grade guideComplete technical guide to Hastelloy B-3 (UNS N10675 / W.Nr. 2.4600). Nickel-molybdenum alloy chemical composition, mechanical properties.
Hastelloy C-2000: Versatile Corrosion Resistance & Chemical Process EquipmentUNS N06200Grade guideComplete technical guide to Hastelloy C-2000 (UNS N06200 / W.Nr. 2.4675) — nickel-chromium-molybdenum-copper alloy with superior versatility in both.
Hastelloy C-22: Complete Properties & Application GuideUNS N06022Grade guideComplete technical guide to Hastelloy C-22 (UNS N06022 / W.Nr. 2.4602). Chemical composition, mechanical properties, corrosion resistance, and...
Hastelloy C-276: Chemical Composition, Properties & Corrosion ResistanceUNS N10276Grade guideComplete technical guide to Hastelloy C-276 (UNS N10276 / W.Nr. 2.4819). Chemical composition, mechanical properties.
Hastelloy C-4: The Most Microstructurally Stable Ni-Cr-Mo Alloy for Chemical ProcessingUNS N06455Grade guideComplete technical guide to Hastelloy C-4 (UNS N06455 / W.Nr. 2.4610). The most thermally stable C-series alloy with no W, ultra-low C/Si/Fe.
Hastelloy G-3 (UNS N06985 / W.Nr 2.4619): Ni-Cr-Mo-Cu Alloy for Chemical ProcessingUNS N06985Grade guideComplete technical guide to Hastelloy G-3 (UNS N06985 / W.Nr 2.4619) — a nickel-chromium-molybdenum-copper corrosion-resistant alloy for wet...
Hastelloy G-30: Phosphoric Acid Resistance & Fertilizer IndustryUNS N06030Grade guideComplete technical guide to Hastelloy G-30 (UNS N06030 / W.Nr. 2.4603). High-chromium nickel-iron-molybdenum-copper alloy with outstanding resistance...
Hastelloy G-35: Wet Process Phosphoric Acid Resistance & Fertilizer IndustryUNS N06035Grade guideComplete technical guide to Hastelloy G-35 (UNS N06035 / W.Nr. 2.4643). The premium 33% chromium nickel alloy engineered for wet process phosphoric...
Hastelloy N: The Ultimate Molten Salt Reactor AlloyUNS N10003Grade guideComplete technical guide to Hastelloy N (UNS N10003 / W.Nr. 2.4610). The only nickel-molybdenum-chromium alloy engineered for extreme molten fluoride...
Hastelloy X: Complete Properties & Application GuideUNS N06002Grade guideComplete technical guide to Hastelloy X (UNS N06002 / W.Nr. 2.4665). Chemical composition, mechanical properties, corrosion resistance, and...
C-2000 (ERNiCrMo-17) Welding Wire GuideUNS N06200Filler metalTechnical guide to C-2000 (ERNiCrMo-17 / UNS N06200) welding wire. Composition, welding parameters, applications, and specifications.
Hastelloy B-2 (ERNiMo-7) Welding Wire GuideUNS N10665Filler metalTechnical guide to Hastelloy B-2 (ERNiMo-7 / UNS N10665) welding wire. Composition, welding parameters, applications, and specifications.
Hastelloy C-276 vs C-22 vs C-2000: Which C-Type Alloy Fits Your ProcessUNS N10276ComparisonHastelloy C-276 vs C-22 vs C-2000 compared: composition, corrosion by environment, weldability, strength and a which-to-buy decision guide with UNS...
Hastelloy C-276 vs Hastelloy C-22: Corrosion Resistance, Welding & Chemical ApplicationsUNS N10276ComparisonDetailed comparison of Hastelloy C-276 (UNS N10276) and Hastelloy C-22 (UNS N06022): chemical composition, crevice corrosion resistance (CCT).
Hastelloy C-276 vs Inconel 625: Corrosion Resistance ComparisonUNS N10276ComparisonDetailed technical comparison of Hastelloy C-276 (UNS N10276, ASTM B575) vs Inconel 625 (UNS N06625, ASTM B443) — chemical composition.
Hastelloy C-4 (ERNiCrMo-7) Welding Wire GuideUNS N06455Filler metalTechnical guide to Hastelloy C-4 (ERNiCrMo-7 / UNS N06455) welding wire. Composition, welding parameters, applications, and specifications.

Which product forms are available?

Round bars · Seamless tubes · Plates & sheets · Precision strips · Forgings & rings · Welding wire. Not every grade is stocked in every form — cast superalloys, for example, are supplied as master alloy ingots and investment castings rather than wrought bar. Contact us for current stock and size ranges.

Which standards apply?

Supplied to ASTM, ASME, AMS, DIN/W.Nr., EN, GB and GOST specifications. The individual grade articles list the applicable standard numbers for each product form.

Frequently asked questions about Hastelloy

What is Hastelloy?

Hastelloy is a family of nickel-based corrosion-resistant alloys covering Ni-Mo (B series), Ni-Cr-Mo (C series) and Ni-Cr-Mo-Cu (G series) compositions.

Which Hastelloy resists hydrochloric acid best?

Hastelloy B-2 and B-3 (about 28% molybdenum) are the reference grades for hydrochloric acid across the full concentration and temperature range.

What is the difference between Hastelloy C-276 and C-22?

C-22 has higher chromium and lower iron than C-276, giving better resistance to oxidizing media and pitting, while C-276 remains the more widely stocked general-purpose grade.

Which Hastelloy is most microstructurally stable?

Hastelloy C-4 is stabilised with titanium and is the most resistant to grain-boundary precipitation during welding and high-temperature exposure.

Which Hastelloy for phosphoric acid?

Hastelloy G-30 and G-35 are developed specifically for wet-process phosphoric acid and fertilizer service.

Other alloy families

Inconel · Monel · Incoloy · Pure Nickel · Copper-Nickel · Cast Superalloys — see the full family index.

Need Hastelloy material?

Send your grade, specification, dimensions and quantity for a quotation. WhatsApp +86 13611656360 or email hangbo@nickel-alloy.com.

← Back to Knowledge Center