B3 Hastelloy® Alloy Round Bar | Advanced Resistance to Mixed Acids & High-Temperature Corrosion

✓ Hybrid Acid Dominance: Resists 20% HCl + 5% HNO₃ at 90°C (194°F) with **<0.03mm/year corrosion rate** – industry-leading performance in mixed acid environments.

✓ Thermal Stability: Maintains structural integrity from **-50°C to 450°C (-58°F to 842°F)** under rapid thermal cycling.

✓ Fabrication-Friendly: Ultra-low carbon (0.01% max) minimizes carbide precipitation during welding.

✓ Precision Machining: Hot-rolled and cold-drawn bars with **±0.5% diameter tolerance** and Ra ≤0.8μm surface finish for CNC applications.

B3 Hastelloy® Alloy Round Bar (UNS N10675)

Engineered to dominate the most aggressive mixed acid and high-temperature environments, B3 Hastelloy® alloy round bar combines a nickel-molybdenum-chromium-tungsten matrix (Ni-65%, Mo-28.5%, Cr-1.8%, W-1.5%) to deliver unmatched resistance to hydrochloric acid (HCl), sulfuric acid (H₂SO₄), and oxidizing acid mixtures. Certified to ASTM B574, ASME SB-574, and NACE MR0175, this alloy outperforms B2 Hastelloy in thermal stability and localized corrosion resistance, offering 3x the lifespan of 316L in chemical processing, pharmaceutical, and metal pickling industries.

Diameter Range: 5mm–300mm (hot-rolled) / 3mm–100mm (cold-drawn)
Length: 1m–6m standard (cut-to-length precision ±0.5mm)
Surface Finishes: Pickled & Passivated, Polished (Ra ≤0.6μm), Electropolished (Ra ≤0.2μm)
Mechanical Properties: Yield Strength ≥350 MPa | Tensile Strength ≥700 MPa | Elongation ≥40% | Hardness ≤220 HBW

Parameter Category	Value/Description
Material Standard	ASTM B335 (Hot/Cold-Finished Bars), ASME SB335, EN 2.4600
Chemical Composition (%)	Ni ≥65, Mo 27–32, Fe 1.0–3.0, Cr 1.0–3.0, Co ≤3.0, C ≤0.01, Mn ≤3.0, Si ≤0.10, S ≤0.01, Al ≤0.50, Ti ≤0.20
Tensile Strength (MPa)	≥760 (Annealed)
Yield Strength (MPa)	≥350 (Annealed)
Elongation (%)	≥40 (in 50mm gauge length)
Hardness	Brinell (HBW): ≤230; Rockwell (HRB): ≤99 (Annealed)
Density (g/cm³)	9.22
Melting Range (°C)	1330–1380
Thermal Conductivity (W/m·K)	10.1 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	11.6 (20–100°C)
Electrical Resistivity (Ω·m)	1.37 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	210
Magnetic Permeability	Non-magnetic
Corrosion Resistance	Superior resistance to hydrochloric acid (HCl), sulfuric acid (H₂SO₄), phosphoric acid (H₃PO₄), and reducing environments. Improved resistance to intergranular corrosion compared to B-2. Avoid oxidizing media (e.g., HNO₃).
Heat Treatment	Solution Annealing: 1150–1200°C followed by rapid cooling (water quench).
Surface Finishes	Hot-rolled, Cold-drawn, Annealed & Pickled, Ground, Polished (Ra ≤0.8μm).
Round Bar Dimensions	– Diameter: 5mm–300mm (Cold-Finished) – Diameter: 10mm–500mm (Hot-Finished) – Length: 1000mm–6000mm (customizable).
Key Applications	Hydrochloric acid reactors, sulfuric acid processing pipelines, nuclear fuel reprocessing, chemical plants, and pickling equipment.

B3 Hastelloy® Alloy Round Bar (UNS N10675) Applications

Industry	Critical Components	B3 Round Bar Advantage
Chemical Processing	Mixed-acid reactors, HCl recovery systems	0.025mm/year corrosion rate in 30% HCl + 2% HNO₃ at 100°C.
Pharmaceutical	High-purity solvent distillation columns	Complies with FDA CFR 211.65 and EU GMP Annex 1.
Metal Pickling	Titanium/zirconium pickling baths	Resists 10% HF + 15% HNO₃ at 90°C (194°F).
Pollution Control	Flue gas desulfurization (FGD) scrubbers	Immune to 15% HCl + 5% HF at 80°C (176°F).

B3 Hastelloy® Alloy Round Bar (UNS N10675) Product Packaging

B3 Hastelloy® Alloy Round Bar (UNS N10675) deliver unmatched resistance to hydrochloric acid, chlorine gas, and extreme thermal cycling (up to 1,200°C). To preserve dimensional precision and metallurgical stability during global transit, we deploy aerospace-grade packaging systems and intelligent logistics protocols certified to NACE MR0175, AMS 5759, and EN 10088-3 standards.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。