Hastelloy® B3 Plates | UNS N10675 Ni‑Mo Plates for Hydrochloric Acid, Chemical, Marine, Pharma & Power
Table of Contents:
A fertilizer complex on the west coast of India had grown used to walking past “sacrificial” acid piping and storage tanks: every turnaround revealed deep grooving, pitting and weld‑edge attack in hot hydrochloric acid and mixed reducing acids, even where 904L, duplex and earlier Ni‑Mo grades had been installed as upgrades, and the cost of unplanned plate replacements kept creeping up along with insurance audits. When the plant’s integrity and procurement teams rebuilt reactor shells, acid storage tanks and critical transfer lines in Hastelloy® B3 Plates (UNS N10675, 2.4600), they moved to a nickel‑molybdenum alloy whose datasheets describe extremely high resistance to pure hydrochloric, hydrobromic and sulfuric acids and greatly improved structural and thermal stability compared with previous B‑type alloys, with minimum tensile strength above 750 MPa, yield strength above 340 MPa, elongation above 40% and hardness below about 240 HBW; corrosion curves in boiling acetic, formic, phosphoric and sulfuric acids show average rates as low as 0.005–0.076 mm/year, and long‑term tests in boiling 45% MgCl₂ for 1008 hours reported no stress‑corrosion cracking, turning those “sacrificial” assets into long‑life, code‑compliant equipment.
Hastelloy B3 is a modern nickel‑molybdenum alloy that maintains the exceptional resistance of B‑type alloys to strong reducing acids while providing significantly better thermal stability, fabricability and stress‑corrosion‑cracking resistance than Hastelloy B2. Producer and corrosion‑materials literature note that HASTELLOY® B‑3® alloy (UNS N10675) exhibits extremely high resistance to pure hydrochloric, hydrobromic and sulfuric acids, excellent resistance to pitting corrosion, stress‑corrosion cracking and knife‑line/heat‑affected‑zone attack, and a strong tendency to remain structurally stable during welding and service in the 500–900 °C range where earlier B‑type alloys could embrittle.
For procurement heads, corrosion and process engineers, fabricators, OEMs and hardware or industrial supply stores supporting chemical, oil & gas, marine, pharma and power‑generation assets, Hastelloy B3 plates solve two chronic problems: the need to resist hydrochloric and other non‑oxidising acids at all concentrations and temperatures, and the need to avoid microstructural instability or knife‑line attack during fabrication, welding and thermal cycles. Room‑temperature data from plate and sheet sources list minimum tensile strength above 750 MPa, minimum yield strength above 340 MPa, elongation above 40% and hardness below about 240 HBW, with 6.4 mm solution‑treated plate still retaining tensile strength around 735 MPa and elongation around 65% at 650 °C, illustrating the alloy’s thermal stability in high‑temperature services.
Aurico Alloys LLP can support this demand as an affordable, authentic Hastelloy® B3 Plates supplier, manufacturer and stockist in India with exports abroad, supplying plate to UNS N10675 / DIN 2.4600 chemistry ranges in accordance with ASTM B333 / ASME SB333 and providing Mill Test Certificates, corrosion data and fabrication support for chemical processing, hydrochloric acid equipment, marine and offshore, pharma vessels and power‑generation balance‑of‑plant. This positioning matches search intent such as “Hastelloy B3 plate suppliers in Mumbai for hydrochloric acid processing equipment”, “ASTM B333 Hastelloy B3 plate stockist for chemical fertilizer plants in Maharashtra”, “Hastelloy B3 plate price in Mumbai for high‑purity chemical storage tanks”, “Industrial Hastelloy B3 plate exporters in Mumbai for offshore oil platform components”, “Custom cut Hastelloy B3 plate sizes for marine exhaust systems in India”, “ASME SB333 Hastelloy B3 plate suppliers for thermal power plants in India” and “Verified Hastelloy B3 plate exporters in India serving global chemical industries”.
High-quality Hastelloy® B3 Plates ready for industrial use.
Specification Overview
| Supplier & Role | Aurico Alloys LLP – Hastelloy B3 plate stockholders in Mumbai for oil and gas refinery piping, high‑purity tanks, marine and power projects, with MTC‑backed inventory for Indian and export markets |
|---|---|
| Alloy Description | Nickel‑molybdenum alloy with controlled chromium and iron additions, designed for superior resistance to strong reducing acids (especially hydrochloric acid) with greatly improved structural and thermal stability versus B2. |
| UNS / Werkstoff / EN | UNS N10675, DIN / Werkstoff 2.4600, sometimes referenced as NiMo30Cr in EN/ISO systems. |
| Main Plate Standards | ASTM B333 / ASME SB333 for plate and sheet, with typical requirements for tensile strength, yield strength and elongation matching B‑type Ni‑Mo alloys; associated product standards (for tubing, fittings) include ASTM B619, B622, B626 and B366 when specifying full systems. |
| Thickness Range | 4.75 mm – 150 mm |
| Service Temperature Window | Designed for use in reducing environments up to about 1000–1070 °C with improved thermal stability; like other B‑type alloys, exposure in the 500–900 °C range must be controlled to avoid formation of deleterious Ni‑Mo phases, with B3’s stability markedly better than B2. |
UNS & Equivalent Grades
| Property | Value |
|---|---|
| UNS number | N10675 |
| Werkstoff / EN number | 2.4600 |
| EN designation | NiMo29Cr |
| Density | 9.22 g/cm3 |
| Melting range | 1370-1418 °C |
| Electrical resistivity | 1.37 µΩ·m |
| Thermal conductivity | 11.2 W/m·°C |
| Coefficient of expansion (25-100 °C) | 10.6 µm/m·°C |
| Specific heat | 373 J/kg·°C |
| Dynamic modulus of elasticity | 216 GPa |
Identifiers and physical constants for Hastelloy B-3. A dash means no such designation is published for this grade.
Stock & Product Availability
As ASTM B333 Hastelloy B3 plate stockist for chemical fertilizer plants in Maharashtra and Hastelloy B3 plate suppliers in Mumbai for hydrochloric acid processing equipment, Aurico Alloys LLP can supply plate thicknesses and dimensions suited to reactors, columns, storage tanks, heat‑exchanger tube sheets and channel covers, in the 4.75–150 mm range with custom cutting for complex geometries. Typical inventory configurations support ASME SB333 design values for tensile strength (≥750 MPa), 0.2% yield strength (≥340 MPa) and elongation (≥40%) with hardness below about 240 HBW and full Mill Test Certificates documenting UNS N10675 / 2.4600 chemistry, mechanical properties and heat treatment.
This combination allows procurement teams and hardware or industrial supply stores to respond to queries such as “Hastelloy B3 plate price in Mumbai for high‑purity chemical storage tanks”, “Hastelloy B3 plate inventory in Mumbai with Mill Test Certificates (MTC)”, “Leading Hastelloy B3 alloy plate dealers for heavy industrial fabrication in Mumbai” and “Industrial Hastelloy B3 plate exporters in Mumbai for offshore oil platform components” with ready‑stock or short‑lead solutions that are traceable and globally acceptable.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 65.0 | — |
| Molybdenum (Mo) | 27.0 | 32.0 |
| Iron (Fe) | 1.0 | 3.0 |
| Chromium (Cr) | 1.0 | 3.0 |
| Nickel + Molybdenum (Ni+Mo) | 94.0 | 98.0 |
| Cobalt (Co) | — | 3.0 |
| Manganese (Mn) | — | 3.0 |
| Tungsten (W) | — | 3.0 |
| Aluminium (Al) | — | 0.50 |
| Copper (Cu) | — | 0.20 |
| Niobium (Nb) | — | 0.20 |
| Tantalum (Ta) | — | 0.20 |
| Titanium (Ti) | — | 0.20 |
| Vanadium (V) | — | 0.20 |
| Zirconium (Zr) | — | 0.10 |
| Carbon (C) | — | 0.01 |
| Silicon (Si) | — | 0.10 |
| Phosphorus (P) | — | 0.030 |
| Sulfur (S) | — | 0.010 |
Composition limits for Hastelloy B-3. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property (Room Temperature, Plate/Sheet) | Typical Value – Hastelloy B3 / UNS N10675 |
|---|---|
| Ultimate Tensile Strength | ≥750 MPa minimum for plate; data for 6.4 mm solution‑treated plate show ≈735 MPa at 650 °C, illustrating high‑temperature strength retention. |
| 0.2% Yield Strength | ≥340 MPa minimum at room temperature; around 290–315 MPa at 650 °C depending on plate thickness. |
| Elongation | ≥40% in 50 mm for plate, with solution‑treated plate showing elongations above 60% at 650 °C in some datasets. |
| Hardness | ≤240 HBW (≈HRB 100) maximum, reflecting a relatively ductile yet strong plate in the solution‑annealed condition. |
| Oxidation / Thermal Stability | Improved structural stability versus B2 in the 500–900 °C range, reducing the risk of embrittling Ni‑Mo phases and knife‑line attack during fabrication and service. |
| Corrosion Metrics (selected) | Average corrosion rates in boiling acetic acid 50% ≈0.005 mm/year, formic acid 40% ≈0.013 mm/year, phosphoric acid 55% ≈0.076 mm/year and sulfuric acid 50% ≈0.043 mm/year; 20% HCl boiling around 0.305 mm/year, reflecting exceptional overall reducing‑acid resistance. |
| Stress‑Corrosion Cracking Resistance | No cracking reported after 1008 hours in boiling 45% MgCl₂ (ASTM G36) in one test series, indicating very good SCC resistance in chloride environments. |
Applications & Benefits
Why this grade
Hastelloy B3 resists the same reducing acids as B2, but its composition was reformulated to suppress the intermetallic precipitation that embrittles B2 in the 550–900°C range. The result is far better thermal stability, so welded and formed sections keep their ductility in service. Specify B3 wherever B2 chemistry is wanted in new fabrication.
- Chemical & Fertilizer Plants: Hastelloy B3 plates are used for hydrochloric acid processing equipment, high‑purity chemical storage tanks, reactors, piping and tower internals where extremely high resistance to pure HCl, hydrobromic and sulfuric acids at all concentrations and temperatures is required and where ASTM B333 plate stockists support fertilizer plants in Maharashtra and across India.
- Pharma & High‑Purity: Corrosion resistant Hastelloy B3 plates for pharmaceutical reactor vessels in India help maintain cleanliness in high‑purity reducing‑acid media, with verified plate exporters and dealers providing ASME SB333 compliance, low carbon content and MTC traceability demanded by regulatory audits.
- Marine & Offshore: In marine environments and seawater cooling systems, Hastelloy B3 plates are used where reducing acid contamination, chlorides and temperature cycles combine, while industrial Hastelloy B3 plate exporters in Mumbai supply custom cut plate sizes for marine exhaust systems, offshore oil platform components and naval engineering where saltwater corrosion resistance and acid‑gas exposure overlap.
- Oil, Gas & Power Generation: Refineries and gas plants specify durable Hastelloy B3 plates for sour‑gas service, acid gas scrubbers and high‑temperature reducing zones, and ASME SB333 Hastelloy B3 plate suppliers support thermal power plants and HRSG units where strong reducing acids appear during cleaning, startup or upset conditions.
- General Sourcing & Export: Verified Hastelloy B3 plate exporters in India serving global chemical industries and leading Hastelloy B3 alloy plate dealers in Mumbai maintain plate inventory with Mill Test Certificates and rapid cutting, enabling fabricators and hardware/industrial supply stores to answer complex RFQs for heavy industrial fabrication with a single, trusted Ni‑Mo plate solution.
FAQ & Search Trends
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Conclusion
Hastelloy® B3 Plates from Aurico Alloys LLP, supplied to UNS N10675 / 2.4600 chemistry limits and ASTM B333 / ASME SB333 mechanical requirements, give chemical, oil & gas, marine, pharma and power‑generation users Ni‑Mo plates that combine extremely high resistance to hydrochloric and other reducing acids with improved thermal stability, excellent pitting and stress‑corrosion‑cracking resistance and fabrication‑friendly behaviour for their most critical tanks, reactors, piping, exhausts and offshore components are your highest‑risk acid and mixed chloride‑reducing environments still relying on stainless, duplex and generic nickel alloys instead of optimised Hastelloy B3 plates?