UNS N10675(Hastelloy B-3)
Generic Name & Other Designation
Hastelloy B-3, Alloy B-3, W.Nr. 2.4600,High-Molybdenum Nickel Alloy,NiMo29Cr, NiMo30Cr
Standard Specifications: ASTM B333, ASTM B335, ASTM B622, ASME SB-333,ASTM B564
Product Overview
UNS N10675 (Alloy B-3) is a nickel-molybdenum alloy engineered specifically to handle aggressive reducing acids, particularly hydrochloric, hydrobromic, and sulfuric acids. Building upon the legacy of Alloy B-2, UNS N10675 features structural improvements that enhance thermal stability and ease of fabrication, reducing sensitivity to intermediate temperature embrittlement.
It is a vital material in chemical synthesis loops where pure reducing conditions prevail and iron/copper contamination is controlled.
Key Highlights
✅ Hydrochloric Acid Specialist: Exceptional resistance to pure hydrochloric acid at all concentrations and temperatures.
✅ Enhanced Thermal Stability: Superior microstructural stability compared to legacy Alloy B-2.
✅ Stress Corrosion Defense: Immune to chloride-induced stress corrosion cracking under extreme loads.
✅ Fabrication Friendly: Resists the formation of detrimental intermetallic phases during thermal processing.
Chemical Composition & Physical Properties
1. Chemical Composition (wt%)
Element | Ni | Mo | Cr | Fe | W | Co | Mn | Al | Ti | Si | C | P | S |
Min (%) | 65.0 | 27.0 | 1.0 | 1.0 | — | — | — | — | — | — | — | — | — |
Max (%) | Bal. | 32.0 | 3.0 | 3.0 | 3.0 | 0.20 | 3.0 | 0.50 | 0.20 | 0.10 | 0.010 | 0.030 | 0.010 |
(Note: Composition strictly complies with ASTM B333/B335 specifications for low-carbon Ni-Mo B-3 superalloy.)
2. Physical & Mechanical Properties
Parameter | Value / Standard (Solution Annealed State) |
Density | 9.22 g/cm³ (0.333 lb/in³) |
Melting Range | 1370°C – 1418°C (2500°F – 2585°F) |
Tensile Strength (Rm) | ≥ 760 MPa (110 ksi) |
Yield Strength (0.2%, Rp0.2) | ≥ 350 MPa (51 ksi) |
Elongation (A5) | ≥ 40% |
Hardness Range | ≤ 230 HBW |
Available Forms
BELNADE supplies UNS N10675 in standard mill product forms with full quality certification:
Plates, Sheets & Coils: ASTM B333 / ASME SB-333; Cold-rolled thin sheets and heavy reactor wall plates.
Round Bars & Rod Stock: ASTM B335 / ASME SB-335; Forged and hot-rolled round bars, valve stems, and precision shafts.
Seamless & Welded Piping / Tubing: ASTM B622 / B619 / B626; Seamless process pipes and heat exchanger/reboiler tubes.
Forged Flanges & Fittings: ASTM B564 / ANSI B16.5; Custom forged weld neck flanges, blind flanges, elbows, and reducers.
Welding Consumables: Matching Alloy B-3 filler metals (AWS A5.14 ERNiMo-10 wire / AWS A5.11 ENiMo-10 coated electrodes).
Typical Application Scenarios
Acid Processing: Hydrochloric acid production, alkylation units, pickling lines.
Chemical Synthesis: Acetic acid production, herbicide synthesis, catalyst recovery.
Petrochemical Refining: Isomerization units, organic chemical distillation towers.
Quality Assurance & Testing
Mechanical testing for tensile, yield, and elongation properties per ASTM E8.
Chemical purity analysis and grain boundary evaluation.
Complete documentation provided with EN 10204 3.1 Material Test Reports.
Supplier Information (BELNADE)
As a specialist supplier, BELNADE provides UNS N10675 products engineered for severe reducing environments. BELNADE offers global export logistics, custom cut-to-size services, and technical support.
Get in Touch with BELNADE for Quotes and Technical Inquiries
📧 Email: info@belnade-material.com
🌐 Website: www.belnade-material.com
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