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Nickel Alloy Grade Data Sheet

Hastelloy G-30

Hastelloy G-30 is a high-chromium nickel-iron alloy developed for resistance to strongly oxidizing acids, chloride-containing media and complex mixed-acid environments. Its chromium, molybdenum, tungsten and copper additions provide particularly strong performance in wet-process phosphoric acid, nitric acid, sulfuric acid mixtures and contaminated chemical streams. Alloy G-30 is commonly specified for fertilizer production, acid processing, pickling equipment, flue-gas scrubbers, heat exchangers and other severe chemical-processing systems.

 

 

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Material Overview

Hastelloy G-30 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 G-30 is a high-chromium nickel-iron alloy developed for resistance to strongly oxidizing acids, chloride-containing media and complex mixed-acid environments. Its chromium, molybdenum, tungsten and copper additions provide particularly strong performance in wet-process phosphoric acid, nitric acid, sulfuric acid mixtures and contaminated chemical streams. Alloy G-30 is commonly specified for fertilizer production, acid processing, pickling equipment, flue-gas scrubbers, heat exchangers and other severe chemical-processing systems.

 

 

Hastelloy G-30

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 G-30 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 G-30
Nickel Ni Balance Forms the corrosion-resistant alloy base and provides metallurgical stability.
Chromium Cr 28.0-31.5 Provides strong resistance to oxidizing acids and supports formation of a protective passive film.
Iron Fe 13.0-17.0 Balances the alloy matrix and contributes to performance in oxidizing acid environments.
Molybdenum Mo 4.0-6.0 Improves resistance to reducing acids, pitting and crevice corrosion.
Tungsten W 1.5-4.0 Supports localized-corrosion resistance and solid-solution strengthening.
Cobalt Co 5.0 max Controlled alloying and residual element.
Copper Cu 1.0-2.4 Improves resistance to sulfuric acid and selected reducing chemical environments.
Niobium + Tantalum Nb + Ta 0.30-1.50 Contributes to alloy stability and resistance in complex corrosive media.
Manganese Mn 1.50 max Controlled minor alloying and deoxidizing element.
Silicon Si 0.80 max Controlled minor element and deoxidizer.
Carbon C 0.03 max Restricted to support weldability and resistance to intergranular corrosion.
Phosphorus P 0.040 max Controlled impurity for consistent fabrication and corrosion performance.
Sulfur S 0.020 max Restricted impurity for improved 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 8.22 g/cm3 0.297 lb/in3 Room temperature
Melting Range 1370-1400 °C 2498-2552 °F Typical range
Specific Heat Approx. 414 J/kg·°C Approx. 0.099 Btu/lb·°F Approx. 20 °C
Thermal Conductivity Approx. 11.0 W/m·°C Approx. 76 Btu·in/ft2·h·°F Approx. 20 °C
Electrical Resistivity Approx. 128 µΩ·cm Approx. 770 ohm-cmil/ft Approx. 20 °C
Modulus of Elasticity Approx. 196 GPa Approx. 28.4 x 103 ksi Annealed, room temperature
Mean Thermal Expansion Approx. 12.4 µm/m·°C Approx. 6.9 µin/in·°F 20-100 °C
Magnetic Permeability Approx. 1.001 Essentially non-magnetic Annealed, room temperature

 

 

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
Plate, sheet and strip – solution annealed 690 MPa min 310 MPa min 40% min By specification
Rod and bar – solution annealed 690 MPa min 310 MPa min 40% min By specification
Rod and bar – cold worked 800-1100 MPa 550-900 MPa 15-30% Condition dependent
Seamless pipe and tube – solution annealed 690 MPa min 310 MPa min 40% min By specification
Wire – annealed 690-900 MPa 310-500 MPa 30-45% By size and condition
Forgings and rings – solution annealed 690 MPa min 310 MPa min 30% 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 G-30 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, Strip ASTM B582 / ASME SB582 Hot rolled plate, cold rolled sheet, strip and cut blanks EN10204 3.1, chemical analysis and mechanical testing
Rod and Bar ASTM B581 / ASME SB581 Round bar, rod, machined bar and cut lengths MTC, PMI, tensile testing and dimensional inspection
Seamless Pipe & Tube ASTM B622 / ASME SB622 Seamless pipe, process tube and heat-exchanger tube Hydrostatic test, eddy-current test and MTC
Welded Pipe ASTM B619 / ASME SB619 Longitudinally welded pipe and fabricated process piping Radiographic or ultrasonic inspection, hydrotest and MTC
Welded Tube ASTM B626 / ASME SB626 Welded process tube and heat-exchanger tube Eddy-current test, hydrostatic or pneumatic test and MTC
Forgings and Flanges ASTM B462 / ASME SB462 Rings, discs, blocks, flanges and custom forgings Heat-treatment record, ultrasonic testing, PMI and MTC
Fittings ASTM B366 / ASME SB366 Elbows, tees, reducers, caps and drawing-based fittings PMI, dimensional inspection, penetrant testing and MTC
Welding Products AWS A5.14 ERNiCrMo-11, AWS A5.11 ENiCrMo-11 Matching welding wire, bare electrodes and covered electrodes Chemical analysis, mill certificate and dimensional inspection

 

 

Available Product Forms

Hastelloy G-30 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 6-762 mm, wall thickness or schedule to specification Seamless or welded, solution annealed, pickled or bright annealed Phosphoric acid plants, fertilizer equipment, heat exchangers and acid piping View Pipe & Tube
Round Bar Diameter 3-500 mm, custom cut lengths available Hot rolled, forged, solution annealed, peeled or polished Valve components, pump shafts, fasteners and machined acid-service parts View Round Bar
Sheet & Plate Thickness 0.5-150 mm, custom widths and lengths Hot rolled, cold rolled, solution annealed, pickled or polished Acid tanks, process vessels, scrubbers, ducting and fabricated equipment View Sheet & Plate
Strip & Foil Thickness 0.02-5 mm, precision slit widths available Cold rolled, solution annealed, bright finished or coil supplied Corrosion-resistant seals, liners, diaphragms and precision formed parts View Strip & Foil
Wire Diameter 0.1-20 mm, coil, spool or straight-length supply Cold drawn, solution annealed, bright or pickled Wire forms, mesh, demister pads and welding-product manufacture View Wire
Fasteners Standard and custom bolts, nuts, screws, studs and washers Solution annealed, machined, rolled thread or custom finished Fertilizer plants, acid-processing equipment and flue-gas scrubbers View Fasteners
Fittings ASME, ANSI, EN and custom drawing dimensions Seamless, welded, formed or machined, solution annealed Phosphoric acid piping, mixed-acid systems and chemical process lines View Fittings
Flanges ASME B16.5, ASME B16.47, EN and custom large-diameter designs Forged, solution annealed, machined and inspected Acid piping, process vessels, scrubbers and fertilizer production systems View Flanges
Forgings Rings, discs, blocks and shafts up to 2000 mm or drawing requirements Open-die or closed-die forged, solution annealed and machined Pump components, valve bodies, pressure parts and custom chemical equipment View Forgings
Welding Wire Diameter 0.8-4.0 mm, spool, coil or straight length Precision drawn, clean bright finish and controlled chemistry Joining Alloy G-30, chemical equipment fabrication and corrosion-resistant overlay View Welding Wire

 

 

Material Selection Guide

When to consider Hastelloy G-30

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 G-30 Helps Common Product Form Buyer Note
Wet-process phosphoric acid High chromium, molybdenum, tungsten and copper contents provide resistance to contaminated phosphoric acid. Plate, pipe, tube, fittings and process vessels Specify acid concentration, temperature, chloride content and other impurities.
Oxidizing mixed-acid service The high chromium content provides strong resistance to nitric acid and mixed oxidizing environments. Pipe, tube, plate, fittings and heat exchangers Provide the complete acid composition and maximum operating temperature.
Fertilizer production Alloy G-30 resists many corrosive streams found in phosphoric acid and fertilizer processing. Plate, pipe, tube, pumps, valves and fabricated assemblies Review process-stage chemistry because conditions vary throughout the plant.
Chloride-contaminated acids Molybdenum and tungsten improve resistance to pitting and crevice corrosion in complex acid streams. Pipe, tube, sheet, plate and fittings Check chloride concentration, temperature, aeration and crevice geometry.
Flue-gas scrubbing systems The alloy provides resistance to oxidizing condensates containing chlorides and acidic contaminants. Plate, sheet, pipe, ducting and scrubber components Confirm condensate chemistry, dew-point conditions and erosion risk.
Welded chemical equipment Low carbon content and matching filler metals support corrosion-resistant welded fabrication. Plate, sheet, pipe, tube and welding wire Control cleanliness, heat input, interpass temperature and final inspection.

 

 

Why Choose Us

Supply and quality support for Hastelloy G-30

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.

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FAQ

Hastelloy G-30 questions from buyers

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

Hastelloy G-30 is mainly used for wet-process phosphoric acid production, fertilizer plants, mixed-acid processing, pickling systems, flue-gas scrubbers, heat exchangers and chemical process equipment.

Yes. UNS N06030 is the standardized UNS designation for Hastelloy G-30. The alloy may also be identified as Alloy G-30, Nickel Alloy G-30, W.Nr. 2.4603 or NiCr30FeMo.

Its high chromium content provides resistance to oxidizing contaminants, while molybdenum, tungsten and copper improve performance in reducing components and chloride-contaminated wet-process phosphoric acid.

YSN128 can quote plate, sheet, strip, round bar, rod, wire, seamless pipe, welded pipe, tube, forgings, flanges, fittings, fasteners and welding wire. Cutting, forming, machining and drawing-based production can also be discussed.

Common specifications include ASTM B582 for plate and sheet, ASTM B581 for rod and bar, ASTM B622 for seamless pipe and tube, ASTM B619 for welded pipe, ASTM B626 for welded tube, ASTM B462 for forgings and ASTM B366 for fittings.

Yes. Alloy G-30 has good weldability when clean joint preparation and suitable nickel-alloy procedures are used. Matching filler metals such as ERNiCrMo-11 may be specified according to the approved welding procedure.

Alloy G-30 provides useful resistance to selected sulfuric acid conditions, particularly in mixed or contaminated process streams. Suitability depends on concentration, temperature, aeration and impurities, so the complete operating chemistry should be reviewed.

Please send the product form, dimensions, quantity, applicable ASTM or ASME standard, delivery condition, inspection requirements, destination and service temperature. Process chemistry, acid concentration and contaminant levels should also be provided when corrosion suitability must be reviewed.

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