Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer and global supplier of Hastelloy B-3 (UNS N10675), supplying high-purity round bars, seamless tubes, and forged plates to the chemical processing, pharmaceutical, and acid recovery industries worldwide.

Quick Answer: What Is Hastelloy B-3? Hastelloy B-3 (UNS N10675, W.Nr. 2.4600) is an advanced nickel-molybdenum alloy designed for extreme resistance to hydrochloric acid (HCl) and other strongly reducing chemicals. As the successor to Hastelloy B-2, it offers the same industry-leading corrosion resistance but with significantly improved thermal stability. This prevents the formation of brittle phases during welding and heat treatment, making it much easier to fabricate and safer for critical chemical reactors.

Key standards: ASTM B335 (bar), ASTM B622 (tube), ASTM B333 (plate), ASTM B564 (forgings).

Why Engineers Choose Hastelloy B-3

Advantage Detail
HCl Mastery Unmatched resistance to hydrochloric acid at all concentrations and temperatures
Superior Thermal Stability Resists embrittlement during welding and heat treatment compared to B-2
Reducing Acid Resistance Exceptional in pure sulfuric, phosphoric, and organic acids
Ductility Excellence Maintains high mechanical integrity after complex fabrication
Pitting Resistance Highly resistant to chloride-induced stress-corrosion cracking

Shanghai Hangbo Alloy Group: Product Forms & Manufacturing Process

Hastelloy B-3 Round Bars & Forgings Manufacturing route: VIM → ESR → Precision Forging (20T) → Solution Annealing → Peeling / Grinding.

  • Diameter range: 8 mm – 500 mm
  • QC: 100% Ultrasonic Testing (UT), Spectral analysis for precise Ni-Mo balance.

Hastelloy B-3 Seamless Tubes & Pipes Manufacturing route: VIM/ESR Billet → Hot Extrusion → Cold Drawing → Solution Annealing → NDT.

  • OD range: 6 mm – 219 mm | Wall: 0.5 mm – 20 mm
  • Testing: 100% Hydrostatic + Eddy Current (ECT) testing.

Hastelloy B-3 Plates & Sheets Manufacturing route: VIM/ESR Ingot → Hot Rolling → Cold Rolling → Solution Annealing → Leveling.

  • Thickness: 0.5 mm – 80 mm | Width: up to 2,000 mm

Chemical Composition (ASTM B335 / ASME SB335)

 

Ni Mo Fe Cr C Si Mn Co Al Ti W Cu P S V Ta Zr
≥ 65.0 27.0-32.0 1.0-3.0 1.0-3.0 ≤ 0.01 ≤ 0.10 ≤ 3.0 ≤ 3.0 ≤ 0.5 ≤ 0.2 ≤ 3.0 ≤ 0.2 ≤ 0.03 ≤ 0.01 ≤ 0.2 ≤ 0.2 ≤ 0.1

Mechanical & Physical Properties (Annealed)

  • Density: 9.22 g/cm³
  • Melting Range: 1370 – 1418°C (2500 – 2585°F)
  • Tensile Strength: ≥ 760 MPa (110 ksi)
  • Yield Strength (0.2%): ≥ 310 MPa (45 ksi)
  • Elongation: ≥ 40%

Typical Applications by Industry

  • Chemical Processing: Heat exchangers, pressure vessels, and piping systems handling HCl.
  • Pharmaceutical: Distillation columns and reactors for acidic synthesis.
  • Acid Recovery: Systems for the regeneration of strong reducing acids.

Frequently Asked Questions (FAQ)

How is Hastelloy B-3 different from B-2?

B-3 provides the same corrosion resistance as B-2 but has much better thermal stability. It is less likely to become brittle during welding or when exposed to intermediate temperatures during fabrication.

Does Shanghai Hangbo provide technical support for welding B-3?

 Yes. We provide guidance on heat input and filler metal selection to ensure the weld zone maintains the same high corrosion resistance as the base metal.

Contact Shanghai Hangbo Alloy Group

Website: www.nickel-alloy.com

Email: hangbo@nickel-alloy.com

WhatsApp / Phone: +86 15821512599


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