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Nickel Alloy Grade Data Sheet

Hastelloy B-3

Hastelloy B-3 is commonly specified for chemical processing equipment exposed to hydrochloric acid, hydrobromic acid, sulfuric acid and other strongly reducing media. The alloy combines excellent resistance to reducing acids with substantially improved thermal and structural stability compared with earlier B-type alloys. It is supplied in plate, sheet, strip, bar, pipe, tube, wire, forging and fitting forms for reactors, pressure vessels, heat exchangers, piping systems, pumps, valves and acid-processing equipment.

 

 

 

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Material Overview

Hastelloy B-3 material profile

A concise grade introduction for buyers who need to confirm composition, properties, standards, available forms and suitable applications before sending an inquiry.

Engineering profile

Hastelloy B-3 is commonly specified for chemical processing equipment exposed to hydrochloric acid, hydrobromic acid, sulfuric acid and other strongly reducing media. The alloy combines excellent resistance to reducing acids with substantially improved thermal and structural stability compared with earlier B-type alloys. It is supplied in plate, sheet, strip, bar, pipe, tube, wire, forging and fitting forms for reactors, pressure vessels, heat exchangers, piping systems, pumps, valves and acid-processing equipment.

 

 

 

Hastelloy B-3

Technical data on this page is for material selection reference. Final acceptance values should be confirmed by the purchase standard, heat treatment condition, product form, size and material test certificate.

Chemical Composition

Hastelloy B-3 composition range

The following table shows common limiting composition values for Alloy 625 / UNS N06625. Actual product chemistry is reported by heat on the material test certificate.

Element Symbol Typical Requirement Role in Alloy B-3
Nickel Ni 65.0 min Forms the corrosion-resistant matrix and provides resistance to reducing acids and chloride stress corrosion cracking.
Molybdenum Mo 27.0-32.0 Provides excellent resistance to hydrochloric acid, sulfuric acid, pitting and localized corrosion.
Iron Fe 1.0-3.0 Carefully controlled to improve structural stability while maintaining resistance to reducing media.
Chromium Cr 1.0-3.0 Controlled addition that improves thermal stability without changing the alloy’s reducing-acid service focus.
Tungsten W 3.0 max Supports resistance to localized corrosion and contributes to the alloy’s metallurgical balance.
Manganese Mn 3.0 max Controlled alloying and processing element.
Cobalt Co 3.0 max Controlled residual and alloying element.
Carbon C 0.01 max Kept very low to limit harmful grain-boundary precipitation and preserve corrosion resistance after welding.
Silicon Si 0.10 max Strictly controlled to improve thermal stability and reduce formation of undesirable intermetallic phases.
Aluminum Al 0.50 max Controlled minor element affecting deoxidation and metallurgical stability.
Titanium Ti 0.20 max Controlled minor element used to maintain the intended microstructural balance.
Niobium Nb 0.20 max Controlled residual element.
Vanadium V 0.20 max Controlled residual element.
Copper Cu 0.20 max Controlled residual element affecting corrosion behavior.
Phosphorus P 0.030 max Controlled impurity for grain-boundary integrity and fabrication performance.
Sulfur S 0.010 max Controlled impurity affecting hot workability and weld quality.

 

 

 

Physical Properties

Key physical and thermal data

These values help customers compare density, thermal behavior, magnetic response and conductivity during early material selection.

Property Metric Value Imperial / Notes Condition
Density 9.22 g/cm3 0.333 lb/in3 Room temperature
Melting Range 1370-1418 °C 2500-2585 °F Typical range
Specific Heat 373 J/kg·°C 0.089 Btu/lb·°F Room temperature
Thermal Conductivity 11.2 W/m·°C 78 Btu·in/ft2·h·°F Room temperature
Electrical Resistivity 137 µΩ·cm 53.8 µΩ·in Room temperature
Dynamic Modulus of Elasticity Approx. 216 GPa Approx. 31.4 x 103 ksi Mill annealed, room temperature
Mean Thermal Expansion Approx. 10.6 x 10-6/°C Approx. 5.7 x 10-6/°F 25-100 °C

 

 

 

Mechanical Properties

Room-temperature mechanical properties

Mechanical properties vary with product form, size, processing route and heat treatment. The table below summarizes commonly referenced nominal values for material selection.

Product Form / Condition Tensile Strength Yield Strength, 0.2% Elongation Hardness
Sheet – mill annealed, typical Approx. 862 MPa Approx. 421 MPa Approx. 53% Approx. 93 HRBW
Plate – mill annealed, typical Approx. 883 MPa Approx. 400 MPa Approx. 58% Approx. 95 HRBW
Plate, sheet and strip – specification minimum 760 MPa min 350 MPa min 40% min 100 HRB max
Rod and bar – mill annealed 760 MPa min 350 MPa min 40% min 100 HRB max
Seamless pipe and tube – mill annealed 760 MPa min 350 MPa min 40% min By specification
Welded pipe and tube – mill annealed 760 MPa min 350 MPa min 40% min By specification
Forgings – mill annealed 760 MPa min 350 MPa min 40% min By specification

 

 

 

For pressure equipment, aerospace parts or project-specific acceptance, use the minimum requirements in the specified ASTM, ASME, AMS, EN or customer drawing rather than nominal values.

Standards & Specifications

Common Hastelloy B-3 standards by product form

YSN128 can quote Alloy 625 products according to ASTM, ASME, AMS, EN, DIN, ISO or customer drawing requirements. Certificate scope can be matched to the purchase order.

Product Form Common Standards Typical Supply Item Certificate / Inspection
Plate, Sheet and Strip ASTM B333 / ASME SB333 Hot rolled plate, cold rolled sheet, strip, coil and cut blanks EN10204 3.1, chemical analysis and mechanical test
Billet, Rod and Bar ASTM B335 / ASME SB335, ASTM B472 Billet, round bar, rod and machined bar MTC, PMI, dimensional inspection and UT when required
Seamless Pipe and Tube ASTM B622 / ASME SB622 Seamless pipe, process tube and heat exchanger tube Hydrostatic test, eddy current test, PMI and MTC
Welded Pipe ASTM B619 / ASME SB619 Longitudinally welded pipe and large-diameter fabricated pipe Radiographic or penetrant testing, hydrotest and MTC
Welded Tube ASTM B626 / ASME SB626 Welded heat exchanger, condenser and process tube Hydrotest, pneumatic or eddy current test and MTC
Forgings and Flanges ASTM B564 / ASME SB564, ASTM B462 / ASME SB462 Rings, discs, blocks, shafts and forged flanges Heat-treatment record, UT, PMI and dimensional inspection
Fittings ASTM B366 / ASME SB366, ASTM B462 / ASME SB462 Elbows, tees, reducers, caps and drawing-based fittings PMI, dimensional inspection, NDT and MTC
Welding Products AWS A5.14 ERNiMo-10, AWS A5.11 ENiMo-10 Matching welding wire, welding rod and covered electrodes Mill certificate, controlled chemistry and dimensional inspection

 

 

 

Available Product Forms

Hastelloy B-3 supply range

Review available product forms, size ranges, standards and delivery options for this alloy.

Form Common Size Range Delivery Condition Typical Applications Page Link
Pipe & Tube OD 6-1219 mm, wall thickness or schedule to specification Seamless or welded, mill annealed, descaled and pickled Reducing-acid piping, reactors, heat exchangers and chemical process systems View Pipe & Tube
Round Bar Diameter 3-600 mm, custom cut lengths available Hot rolled, forged, mill annealed, peeled, ground or polished Pump shafts, valve stems, fasteners and machined chemical-process components View Round Bar
Sheet & Plate Thickness 0.5-100 mm, custom widths and lengths Hot rolled or cold rolled, mill annealed, descaled and pickled Reaction vessels, pressure vessels, tanks, heat exchangers and acid-processing equipment View Sheet & Plate
Strip & Foil Thickness 0.02-3 mm, slit widths and coil dimensions to specification Cold rolled, mill annealed, pickled or bright finished Corrosion-resistant seals, diaphragms, gaskets and formed process components View Strip & Foil
Wire Diameter 0.1-12 mm, coil, spool or straight-length supply Cold drawn, mill annealed, bright or pickled Springs, screens, mesh, formed components and fastener production View Wire
Fasteners Standard and custom bolts, nuts, screws, studs and washers from M3 to M100 Mill annealed, machined, rolled thread or custom finished Acid-processing vessels, pumps, valves, piping systems and chemical plants View Fasteners
Fittings NPS 1/2-48 in, ASME, EN and custom drawing dimensions Seamless, welded or fabricated, mill annealed and pickled Reducing-acid process piping, reactors, transfer lines and heat exchangers View Fittings
Flanges NPS 1/2-48 in, ASME B16.5, ASME B16.47, EN or custom specifications Forged or cut from plate, mill annealed, machined and inspected Chemical process piping, pressure vessels, valves and acid-transfer systems View Flanges
Forgings Rings, discs, blocks, shafts and drawing-based components to project dimensions Forged, mill annealed, rough machined or finish machined Pump and valve parts, pressure components, agitator shafts and heavy-duty process equipment View Forgings
Welding Wire Diameter 0.8-4.7 mm, spool, coil or straight welding rod Clean bright finish, precision drawn and controlled chemistry Joining Alloy B-3, acid-equipment repair and corrosion-resistant overlay View Welding Wire

 

 

 

Material Selection Guide

When to consider Hastelloy B-3

This guide helps buyers connect service conditions with the typical advantage of Alloy 625. Final selection should consider medium concentration, temperature, pressure, fabrication, availability and budget.

Service Requirement Why Alloy B-3 Helps Common Product Form Buyer Note
Hydrochloric acid service High nickel and molybdenum contents provide exceptional resistance to pure hydrochloric acid across a broad range of concentrations and temperatures. Pipe, tube, plate, fittings, flanges and valve components Confirm acid concentration, temperature, pressure and oxidizing contamination.
Hydrobromic acid service Alloy B-3 provides excellent resistance to hydrobromic acid and other strongly reducing halide environments. Pipe, tube, plate and fabricated vessels Check concentration, temperature, aeration and process impurities.
Sulfuric acid in reducing conditions The nickel-molybdenum composition provides strong resistance over a broad range of sulfuric acid concentrations. Plate, pipe, tube, bar and reactors Review temperature and the presence of ferric ions or other oxidizers.
Improved stability during fabrication Its controlled molybdenum, chromium, iron and minor-element balance delays formation of harmful intermetallic phases compared with Alloy B-2. Plate, sheet, pipe, tube and forgings Qualified forming, welding and heat-treatment procedures are still required.
Chloride stress corrosion cracking The nickel-rich matrix provides excellent resistance to chloride-induced stress corrosion cracking. Pipe, tube, plate, fasteners and fabricated assemblies Evaluate stress, crevices, deposits, temperature and complete process chemistry.
Welded reducing-acid equipment Matching B-3 weld metal retains strong resistance to hydrochloric and sulfuric acids in the as-welded condition. Plate, sheet, pipe, tube and fittings Use ERNiMo-10 or ENiMo-10 filler and control joint cleanliness and heat input.
Strongly oxidizing environments Alloy B-3 is optimized for reducing acids and is generally not the preferred material for strongly oxidizing chemicals. Material selection must be reviewed Check for ferric ions, cupric ions, free chlorine, oxygen and other oxidizing contaminants.

 

 

 

Why Choose Us

Supply and quality support for Hastelloy B-3

For ranking traffic, buyers need more than a data sheet. This section gives clear trust signals for procurement, engineering and quality teams.

STASTM / ASME / AMS / EN

Quotation can be matched to project standards and product form specifications.

MTEN10204 3.1 MTC

Heat number, chemistry, mechanical properties and inspection records can be supplied.

QCPMI & Inspection

PMI, UT, dimensional inspection, visual inspection and packing check are available.

CSCustom Size

Cutting, machining allowance, rough machining and drawing-based supply can be arranged.

EPExport Packing

Wooden case, bundle, waterproof protection and international shipping documents.

RFFast Technical Reply

Send grade, size, standard, quantity and destination for a practical quotation route.

Related Nickel Alloys

Compare nearby grades and product forms

Explore related grades and product forms for comparison.

FAQ

Hastelloy B-3 questions from buyers

Find practical answers about procurement, standards, fabrication and industrial applications.

Hastelloy B-3 is mainly used for reactors, pressure vessels, heat exchangers, process piping, pumps, valves and other equipment exposed to hydrochloric acid, hydrobromic acid, sulfuric acid and strongly reducing chemical environments.

Yes. UNS N10675 is the standardized UNS designation for Hastelloy B-3. The alloy may also be identified as Alloy B-3, Nickel Alloy B-3, W.Nr. 2.4600 or NiMo29Cr.

Its high nickel and molybdenum content provides exceptional resistance to pure hydrochloric acid across a broad range of concentrations and temperatures. Actual suitability should still be checked against contaminants and complete process conditions.

Both alloys are designed for strongly reducing acids. Hastelloy B-3 has a modified molybdenum, chromium, iron and minor-element balance that provides substantially improved thermal and structural stability during fabrication, welding and service.

Alloy B-3 is intended primarily for reducing media. Ferric salts, cupric salts, free chlorine and other oxidizing contaminants can increase corrosion, so it is generally not the first choice for strongly oxidizing environments.

YSN128 can quote plate, sheet, strip, round bar, rod, wire, seamless or welded pipe and tube, forgings, flanges, fittings, fasteners and matching welding products. Custom dimensions, cutting and drawing-based components can be discussed.

Common standards include ASTM B333 for plate, sheet and strip, ASTM B335 for rod and bar, ASTM B622 for seamless pipe and tube, ASTM B619 for welded pipe, ASTM B626 for welded tube, ASTM B564 and ASTM B462 for forgings, and ASTM B366 for fittings.

Yes. Alloy B-3 can be welded by GTAW, GMAW and shielded metal arc processes using qualified procedures. Matching filler metals include AWS A5.14 ERNiMo-10 welding wire and AWS A5.11 ENiMo-10 covered electrodes.

Hot-formed components should normally be solution annealed to restore optimum corrosion resistance and ductility. Solution annealing is also recommended before further welding or fabrication when cold deformation exceeds approximately 7%.

Please send the grade or UNS number, product form, dimensions, quantity, applicable standard, delivery condition, certificate requirements and destination. For corrosion review, include the chemical composition, concentration, temperature, pressure and possible oxidizing contaminants.

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