Nickel Alloy Alloy 30
UNS N06030 · EN 2.4603 · also Hastelloy G-30
Alloy 30 (N06030 / 2.4603, Hastelloy G-30) is a Ni-Cr-Mo-Fe corrosion alloy developed for phosphoric acid and mixed-acid environments that contain both oxidizing and reducing species.
Reference datasheet — Alloy 30 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the SA condition
Alloy 30 tempers and conditions
Alloy 30 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished and annealed | Choose for large-diameter bar, rings and forged valve/pump bodies where hot working precedes the final anneal. | 310 | 680 | 52 | 9 HRC | 1.5 % IACS |
SADefault Solution annealed | Standard stocked condition for plate, sheet, tube, pipe and forgings; maximum corrosion resistance and ductility. | 320 | 690 | 58 | 170 HB | — |
As-welded deposit | Condition of fabricated vessels welded with matching G-30 filler and put into service without post-weld solution annealing. | 420 | 700 | 35 | 14 HRC | 1.4 % IACS |
Cold worked | Pick when higher yield strength, tighter tolerance and better surface finish are needed and full annealed corrosion performance is not critical. | 620 | 860 | 28 | 25 HRC | — |
What is Alloy 30?
Alloy 30 (N06030 / 2.4603, Hastelloy G-30) is a Ni-Cr-Mo-Fe corrosion alloy developed for phosphoric acid and mixed-acid environments that contain both oxidizing and reducing species. Solution-annealed material gives 320 MPa yield, 690 MPa tensile strength, 58 % elongation and about 170 HB, and is used as plate, sheet, welded and seamless tube, and bar for wet-process equipment. Maximum service temperature on file is 675 °C and machinability is low (score 25) because the alloy is gummy and work-hardens quickly. Where chloride pitting and crevice corrosion dominate rather than phosphoric acid, Alloy 59 (N06059) is the nearer choice. Alloy 30 has a density of 8.22 g/cm³ (0.297 lb/in³), lighter than 60% of nickel alloy grades. It melts at 1,290°C (2,354 °F). Alloy 30 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 58% and the elastic modulus is 200 GPa (29 Msi).
What is Alloy 30 used for?
- phosphoric acid production
- fertilizer plants
- pickling equipment
Advantages
- Ductile — tolerates forming and impact — 58%, better than 96% of nickel alloy grades
- Forms and bends easily — 75/100, better than 82% of nickel alloy grades
- Good corrosion resistance — 88/100, better than 81% of nickel alloy grades
Alloy 30 properties
Typical room-temperature values for Alloy 30-SA; bars are the position among nickel alloy grades.
Physical3
Alloy 30 has a density of 8.22 g/cm³ (0.297 lb/in³), lighter than 60% of nickel alloy grades. It melts at 1,290°C (2,354 °F).
Mechanical13
Alloy 30 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 58% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
Alloy 30 is rated for continuous service to 675°C (1,247 °F). It conducts heat at 10.1 W/m·K (5.84 BTU/hr·ft·°F), worse than 84% of nickel alloy grades. Thermal expansion is 12.8 µm/m·K (7.11 µin/in·°F).
Electrical3
Alloy 30 conducts electricity at 1.5 % IACS, better than 51% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 81% of nickel alloy grades.
Sustainability4
Producing a kilogram of Alloy 30 takes about 140 MJ of energy and emits 13 kg of CO₂ — less than 81% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Alloy 30's machinability is poor (25/100, better than 76% of nickel alloy grades); weldability very good (80/100); formability very good (75/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Alloy 30 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Alloy 30
Is Alloy 30 easy to machine?
Work-hardening and gummy: use rigid setups, positive-rake carbide, heavy constant feed, slow speeds (~15–25 m/min carbide turning) and copious coolant; avoid dwelling in the cut.
Can Alloy 30 be welded?
Readily welded by GTAW/GMAW/SMAW with matching G-30 filler; keep heat input and interpass temperature low, no preheat, and clean oxides between passes — post-weld solution anneal only if maximum corrosion resistance is needed.
Can Alloy 30 be formed, bent or molded?
Annealed sheet cold forms and deep draws well but needs roughly double the force of austenitic stainless; intermediate solution anneals for heavy reductions, hot work in the 950–1200 °C range.
Alloy 30 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cr | 28 – 31.5 | 30 |
| Fe | 13 – 17 | 15 |
| Mo | 4 – 6 | 5 |
| W | 1.5 – 4 | 2.5 |
| Cu | 1 – 2.4 | 1.8 |
| Co | ≤ 5 | |
| Nb+Tacolumbium plus tantalum | 0.3 – 1.5 | 0.8 |
| Mn | ≤ 1.5 | |
| Si | ≤ 0.8 | |
| C | ≤ 0.03 | |
| P | ≤ 0.04 | |
| S | ≤ 0.02 | |
| Nibalance, typically 40–45 % | balance |
What surface finishes work on Alloy 30?
Not anodizable; pickle in nitric-hydrofluoric or grind/blast to remove heat tint and embedded iron, then passivate for best acid-service performance; takes a good mechanical polish.
Surface treatments FabDigit runs on nickel alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Alloy 30 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N06030
- EN / DIN / Werkstoff-Nr.
- 2.4603
- Trade names
- Hastelloy G-30
How much does Alloy 30 cost?
Alloy 30 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Alloy 30 — frequently asked
What is Alloy 30 used for?
Alloy 30 is typically used for phosphoric acid production, fertilizer plants and pickling equipment. In short: phosphoric acid specialist; handles mixed oxidizing-reducing acids; weldable with matching filler.
What is the yield strength of Alloy 30?
Alloy 30 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 690 MPa (100 ksi) — weaker than 69% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Alloy 30 easy to machine?
Not especially — machinability is rated poor (25/100, better than 76% of nickel alloy grades). Work-hardening and gummy: use rigid setups, positive-rake carbide, heavy constant feed, slow speeds (~15–25 m/min carbide turning) and copious coolant; avoid dwelling in the cut.
Can Alloy 30 be welded?
Yes — weldability is rated very good (80/100). Readily welded by GTAW/GMAW/SMAW with matching G-30 filler; keep heat input and interpass temperature low, no preheat, and clean oxides between passes — post-weld solution anneal only if maximum corrosion resistance is needed.
What surface finishes work on Alloy 30?
Not anodizable; pickle in nitric-hydrofluoric or grind/blast to remove heat tint and embedded iron, then passivate for best acid-service performance; takes a good mechanical polish.
Can Alloy 30 be formed, bent or molded?
Annealed sheet cold forms and deep draws well but needs roughly double the force of austenitic stainless; intermediate solution anneals for heavy reductions, hot work in the 950–1200 °C range.
What is the maximum service temperature of Alloy 30?
Alloy 30 is rated for continuous use to about 675°C (1,247 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Alloy 30-SA and Alloy 30-CW?
SA is the default condition — standard stocked condition for plate, sheet, tube, pipe and forgings; maximum corrosion resistance and ductility. CW: pick when higher yield strength, tighter tolerance and better surface finish are needed and full annealed corrosion performance is not critical. Yield strength is 320 MPa in SA versus 620 MPa in CW.
How much does Alloy 30 cost?
Alloy 30 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B582 — Ni-Cr-Fe-Mo-Cu Alloy Plate, Sheet and Strip — ASTM International (2019)
- ASTM B581/B622/B619 — Ni-alloy rod, seamless pipe and welded pipe — ASTM International (2020)
- HASTELLOY G-30 alloy principal features and properties — Haynes International (2020)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys (Ni-base corrosion alloys) — ASM International (1990)
- VdTÜV/DIN material sheet 2.4603 (NiCr30FeMo) — DIN/VdTÜV (2015)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.