01
Hastelloy B-3 Bar and Rod
Rod to ASTM B335 from 7.94 to 88.9 mm diameter, with larger sections supplied as forged bar.
View Hastelloy B-3 Bar and Rod →Hastelloy B-3 — UNS N10675 Composition & Forms
Nickel-molybdenum grade that keeps its ductility through welding heat, for reducing-acid plant built by fabrication.
Stability Window Explained
The page sets out the chromium range that slows Ni4Mo ordering and the carbon ceiling that supports it.
Welded Condition Documented
Consequently, the quench and cooling records that keep a joint ductile travel with the heat number.
Three Routes Under One Melt
Bar, tube, and flat product trace to a single heat and ship under one documentation set.
MATERIAL OVERVIEW
About Hastelloy B-3
Hastelloy B-3 is a nickel-molybdenum alloy carrying the UNS designation N10675. Chromium between 1 and 3% slows the ordered phases that shorten the life of earlier B-type grades. Consequently, a welded vessel keeps its ductility without a post-weld anneal.
Fabricators reach this grade from three directions, and each form page carries its own ordering detail. Bar sits on the Hastelloy B-3 Bar and Rod page, tubular product on Hastelloy B-3 Pipe and Tube, and flat product on Hastelloy B-3 Plate and Sheet. Above all, one melt serves all three routes under the same certificate practice.
KEY FEATURES
Key Features of Hastelloy B-3
Hastelloy B-3 is a nickel-molybdenum alloy carrying the UNS N10675 grade, with chromium held between 1 and 3 percent. That window slows the ordered phases which embrittle earlier B-type grades, so welded fabrications keep their ductility. The chemistry still resists hydrochloric, sulfuric, and phosphoric acid wherever the stream reduces, and it still rules out oxidants. Southerly Alloy works as a professional supplier and exporter of UNS N10675 bar, tube, and flat product under ASTM B335, B622, and B333.
Hastelloy B-3
Chromium Window Effect
The 1 to 3% window slows Ni4Mo ordering, so fabricated parts keep their toughness.
01
Welded Condition Service
Moreover, carbon at 0.01% maximum lets most joints enter service as welded.
02
Hydrochloric Duty Across the Range
Concentration and temperature both sit inside the envelope while the stream reduces.
03
Sulfuric and Organic Acid Range
Consequently, non-oxidizing sulfuric, phosphoric, formic, and acetic media remain within reach.
04
Chloride Media Tolerance
A nickel-rich matrix resists cracking wherever chlorides concentrate.
05
Molybdenum and Nickel Together
Nickel plus molybdenum runs 94.0 to 98.0%, which is the pairing that resists reducing acids.
06
Oxidant-Free Service Only
Nitric acid, wet chlorine, and hypochlorite attack the metal, so those duties need a chromium-rich alloy.
07
Cold Work Sets the Strength
No aging treatment applies, so drawing and rolling set yield above the annealed floor.
08
ALLOY SELECTION
Why Choose Hastelloy B-3
Start with the fabrication route, because that is where B-3 separates itself. If the vessel is welded and cannot be re-annealed afterwards, this grade carries the margin. If it is machined from solid, the choice is narrower.
01
Stability Window
The 1 to 3% chromium range slows the ordering reaction, so heat from welding costs less ductility than it does in earlier grades.
02
Welded Fabrication
In addition, most joints hold their properties as welded, which removes a furnace cycle from the shop schedule.
03
Reducing-Acid Envelope
Molybdenum at 27.0 to 32.0% keeps hydrochloric and sulfuric acid inside the window while oxidants stay out.
04
Standard and Form Coverage
ASTM B335 covers rod, B333 flat product, and B622 seamless tube, so one chemistry reaches three routes.
PRODUCT FORMS
Available Product Forms
Three supply routes carry this grade, and each one names its own ASTM document. Consequently, the order should state the form before the size.
02
Hastelloy B-3 Pipe and Tube
Seamless tube to B622 up to 88.9 mm outside diameter, plus welded pipe to B619 and welded tube to B626.
View Hastelloy B-3 Pipe and Tube →
03
Hastelloy B-3 Plate and Sheet
Flat product to ASTM B333, from 4.76 mm plate down through light sheet and strip.
View Hastelloy B-3 Plate and Sheet →
APPLICATIONS
Engineered For Demanding Industries
Welded plant built for pure reducing acids is where the grade earns its place. Meanwhile, fabrication-heavy projects benefit most from the stability margin.
Discuss Your Application →
01
Welded Reaction Vessels
Shells and heads for hydrochloric acid service that cannot be re-annealed after welding.
02
Distillation Columns
Internals and trays in chlorinated organics service.
03
Acetic Acid Plant
Reactors and columns where the acid stream reduces.
04
Herbicide and Insecticide Units
Equipment handling hydrochloric acid as a reactant or a by-product.
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Pickling and Acid Recovery
Tank linings and immersion hardware in hydrochloric pickling lines.
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Sulfuric Acid Circuits
Exchanger parts and transfer lines at non-oxidizing concentrations.
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Pharmaceutical Reactors
Vessels for acid-bearing process streams where clean surfaces matter.
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Vacuum and Reducing Furnace Parts
Hardware exposed to hot reducing gas rather than air.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
The limits below come from ASTM B335 and B333, which share one composition table for UNS N10675. Chromium is the deliberate addition behind the grade, and nickel plus molybdenum carries the corrosion duty. The mill certificate governs final acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) | 65.0% min. |
| Molybdenum (Mo) | 27.0–32.0% |
| Chromium (Cr) | 1.0–3.0% |
| Iron (Fe) | 1.0–3.0% |
| Tungsten (W) | 3.0% max. |
| Cobalt (Co) | 3.0% max. |
| Manganese (Mn) | 3.0% max. |
| Carbon (C) | 0.01% max. |
| Silicon (Si) | 0.10% max. |
| Phosphorus (P) | 0.030% max. |
| Sulfur (S) | 0.010% max. |
| Vanadium (V) | 0.20% max. |
| Aluminum (Al) | 0.50% max. |
| Titanium (Ti) | 0.20% max. |
| Copper (Cu) | 0.20% max. |
| Columbium (Nb) | 0.20% max. |
| Tantalum (Ta) | 0.20% max. |
| Zirconium (Zr) | 0.10% max. |
| Nickel plus Molybdenum | 94.0–98.0% |
Mechanical Properties
The rod document sets one annealed condition across its whole size range, and the flat-product document matches it. As a result, the table below separates the routes rather than the grades.
| Product Form | Condition | Tensile Strength | Yield Strength, 0.2% Offset | Elongation | Hardness |
|---|---|---|---|---|---|
| Rod, ASTM B335, 7.94–88.9 mm | Solution annealed | ≥110 ksi (760 MPa) | ≥51 ksi (350 MPa) | 40% | 100 HRB max. |
| Plate, ASTM B333, 4.76–63.5 mm | Solution annealed | ≥110 ksi (760 MPa) | ≥51 ksi (350 MPa) | 40% | 100 HRB max. |
| Sheet and strip, ASTM B333, under 4.76 mm | Solution annealed | ≥110 ksi (760 MPa) | ≥51 ksi (350 MPa) | 40% | 100 HRB max. |
| Seamless tube, ASTM B622, to 88.9 mm | Solution annealed | ≥110 ksi (760 MPa) | ≥45 ksi (310 MPa) | 40% | 100 HRB max. |
The grade is not age hardenable, so cold work is the only route above those floors. Typical annealed sheet reaches about 125 ksi tensile with 53% elongation, well above the acceptance minimum.
Physical Properties
Values below are typical room-temperature figures for design work rather than acceptance criteria. In addition, the alloy stays essentially non-magnetic, which suits instrument assemblies in acid duty.
| Property | Value |
|---|---|
| Density | Approx. 9.22 g/cm³ |
| Melting range | Approx. 1370–1418 °C |
| Modulus of elasticity | Approx. 216 GPa |
| Modulus of rigidity | Approx. 83 GPa |
| Thermal conductivity at 20 °C | Approx. 11.2 W/m·K |
| Electrical resistivity at 20 °C | Approx. 1.37 µΩ·m |
| Thermal expansion, 25–100 °C | Approx. 10.6 µm/m·K |
| Magnetic behaviour | Essentially non-magnetic in the annealed condition |
| Strengthening route | Cold work only |
Standards
The forms divide between seven ASTM documents, and the ASME editions take over under pressure-code jurisdiction. Specifically, no SAE aerospace specification reaches UNS N10675. Meanwhile, the European and Chinese designations below serve cross-reference only.
| Standard | Product or Application |
|---|---|
| ASTM B335 / ASME SB335 | Nickel-molybdenum alloy rod, 7.94–88.9 mm |
| ASTM B333 / ASME SB333 | Plate, sheet, and strip |
| ASTM B622 / ASME SB622 | Seamless pipe and tube to 88.9 mm outside diameter |
| ASTM B619 / ASME SB619 | Welded pipe in Schedule 5S, 10S, 40S, and 80S and larger |
| ASTM B626 / ASME SB626 | Welded tube, 3.2–88.9 mm outside diameter |
| ASTM B564 / ASME SB564 | Nickel alloy forgings |
| ASTM B366 / ASME SB366 | Factory-made wrought fittings |
| ASTM B462 | Forged or rolled flanges and forged fittings |
| ASTM B472 | Forging billets and bars for reforging |
| DIN 17743 / 17750 / 17751 / 17752 / 17753 / 17754 | Wrought nickel alloys, flat product, tube, bar, wire, and forgings |
| ISO 6207 / 6208 / 9723 / 9724 / 9725 | Tube, flat product, bar, wire, and forgings |
| UNS N10675 | Unified Numbering System designation |
| W.Nr. 2.4600 / NiMo29 | European designation for Alloy B-3 |
| GB/T 15007 NS3203 | Chinese designation |
| SAE AMS | No aerospace specification covers this grade |
The product documents come from ASTM International, and their text settles any acceptance question.
Dimensions
Ranges below follow the scope each standard defines, and oversize bar moves to the forging document. For that reason, give the form and the ordered size on the enquiry.
| Product Form | Typical Supply Range |
|---|---|
| Rod | 7.94–88.9 mm diameter to ASTM B335 |
| Forged bar | Diameters above 88.9 mm, supplied to ASTM B564 |
| Seamless tube | Outside diameter to 88.9 mm |
| Welded pipe | Schedule 5S, 10S, 40S, and 80S to 8 in nominal and larger |
| Welded tube | Outside diameter 3.2–88.9 mm, wall 0.41–3.7 mm |
| Plate | 4.76–63.5 mm thick to ASTM B333 |
| Sheet | Under 4.76 mm thick, from 600 mm wide |
| Strip | Under 4.76 mm thick, under 600 mm wide |
Surface Finishes
Finish follows the next operation rather than a catalog default. In short, we agree it with the order so the surface suits the fabrication you have planned.
| Surface Condition | Typical Use |
|---|---|
| Solution annealed and pickled | Standard delivery for reducing-acid service |
| Hot-worked | As-rolled or as-forged surface for parts that will be machined |
| Cold drawn | Close diameter control with a brighter surface |
| Peeled | Uniform diameter with a machined skin for further turning |
| Centerless ground | Tight diameter and straightness for shafting |
| Polished | Reduced roughness for product-contact and visible parts |
| Bright annealed | Scale-free surface for instrument and clean circuits |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
FAQ
Frequently Asked Questions
Which ASTM specifications cover Hastelloy B-3?
B335 for rod, B333 for plate, sheet, and strip, and B622 for seamless tube.
Is there an AMS specification for Hastelloy B-3?
No. The SAE aerospace series stops short of UNS N10675.
What makes B-3 more stable than B-2?
Chromium between 1 and 3%, plus carbon at 0.01% maximum. Together they slow the ordered phases that embrittle the older grade.
Can Hastelloy B-3 be used as welded?
Usually yes. However, severe acid duty still calls for a solution anneal and a fast quench after welding.
How high can Hastelloy B-3 run in continuous service?
Roughly −200 to +400 °C depending on load and medium. Beyond that, verify the duty before ordering.
Which contaminants rule the grade out?
Ferric and cupric ions, wet chlorine, and hypochlorite. All of them attack the low-chromium matrix.
What is your MOQ for Hastelloy B-3?
One piece covers most stock sizes.
What are your trade terms for Hastelloy B-3?
We quote mainly on FOB terms, and EXW or CIF follow on request.
What is the lead time for Hastelloy B-3?
Stock sizes ship in 7-15 days, and made-to-order material runs about 25 days.
Do you provide EN 10204 3.1 and 3.2 certificates?
Yes. Every heat ships with an EN 10204 3.1 certificate, and we arrange 3.2 endorsement on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Give us the form, the ordered size, and the acid duty. Price, lead time, and the document set come back in a single message. Because the welding route changes what we can certify, tell us whether the part sees fabrication heat.
Trial quantities are welcome, so a single bar or one plate is enough to prove the grade before a plant-wide order.
