Hastelloy G-30 (UNS N06030) – Supplier of Round Bars, Seamless Tubes & Plates | Shanghai Hangbo Alloy Group
Date: 2026年7月12日 Categories: News Views: 266
By Shanghai Hangbo Alloy Group Co., Ltd. | ISO 9001:2015 Certified | Est. 2012 | Shanghai, China
Quick Answer: What Is Hastelloy G-30?
Hastelloy G-30 (UNS N06030 / W.Nr. 2.4603) is a high-chromium nickel-base superalloy specifically engineered for superior resistance to "wet process" phosphoric acid and other highly oxidizing acid environments. Containing approximately 30% chromium, it outperforms almost all other nickel- and iron-base alloys in commercial phosphoric acid services. Shanghai Hangbo Alloy Group supplies Hastelloy G-30 in precision round bars, seamless tubes, and plates, providing critical reliability for fertilizer production, nuclear fuel reprocessing, and chemical processing plants worldwide.
Key Properties at a Glance
| Property | Value |
|---|---|
| UNS Number | N06030 |
| Density | 8.22 g/cm³ (0.297 lb/in³) |
| Melting Range | 1330 – 1370 °C (2425 – 2500 °F) |
| Max Service Temp. | 427 °C (800 °F) for structural strength |
| Tensile Strength (RT) | ≥ 690 MPa (100 ksi) |
| Yield Strength (RT) | ≥ 283 MPa (41 ksi) |
| Elongation (RT) | ≥ 40% |
| Thermal Conductivity | 10.2 W/m·K (at 100°C) |
| Key Standards | ASTM B581, ASTM B582, ASTM B622 |
Product Overview
Hastelloy G-30 (UNS N06030), also known as Alloy G-30, is a unique metallurgical solution for the most aggressive oxidizing acids. Its high chromium content (28-31.5%) makes it virtually immune to the corrosive effects of nitric acid and provides exceptional resistance to phosphoric acid contaminated with fluorides and chlorides. Additionally, the alloy's iron and molybdenum additions ensure stability in mixed acid environments. Because it resists the formation of grain-boundary precipitates during welding, Hastelloy G-30 is typically used in the as-welded condition, offering significant cost savings in fabrication.
Top three properties:
- Unrivaled Phosphoric Acid Resistance: Specifically designed for wet-process P2O5 environments.
- Exceptional Oxidizing Acid Stability: Outstanding performance in nitric acid and ferric chlorides.
- Excellent Weldability: Low carbon and optimized chemistry prevent sensitization in the heat-affected zone.
Shanghai Hangbo Alloy Group Co., Ltd. (est. 2012) is a premier manufacturer and supplier of Hastelloy G-30. Operating from our Shanghai, China headquarters, we provide high-purity G-30 materials to major chemical and fertilizer producers in over 32 countries. Our ISO 9001:2015 certification and rigorous quality protocols ensure that every round bar, tube, and plate meets the demanding safety standards of the nuclear and chemical sectors.
Related grades: Hastelloy C-276 · Hastelloy G-35 · Inconel 690 · Hastelloy C-22
Executive Standards
| Product Form | ASTM | ASME | EN / W.Nr. | DIN |
|---|---|---|---|---|
| Round Bar / Forging | ASTM B581 / B564 | ASME SB-581 | 2.4603 | DIN 17752 |
| Seamless Tube / Pipe | ASTM B622 | ASME SB-622 | 2.4603 | DIN 17751 |
| Sheet / Plate / Strip | ASTM B582 | ASME SB-582 | 2.4603 | DIN 17750 |
| Wire | ASTM B581 | — | 2.4603 | — |
Chemical Composition (wt.% per ASTM B581)
100% OES verified on every heat at Shanghai Hangbo Alloy Group.
| Element | Ni | Cr | Fe | Mo | W | Co | Cu | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Bal. | 28.0 | 13.0 | 4.0 | 1.5 | — | 1.0 | — | — | — | — | — |
| Max | — | 31.5 | 17.0 | 6.0 | 4.0 | 5.0 | 2.4 | 0.03 | 1.5 | 0.80 | 0.04 | 0.02 |
Mechanical & Physical Properties
Room-Temperature Properties (Annealed)
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥ 690 MPa (100 ksi) | ASTM B581 |
| Yield Strength (0.2%) | ≥ 283 MPa (41 ksi) | ASTM B581 |
| Elongation | ≥ 40% | ASTM B581 |
| Hardness | ≤ 100 HRB | — |
| Density | 8.22 g/cm³ | — |
| Melting Range | 1330–1370 °C | — |
| Thermal Conductivity | 10.2 W/m·K at 100°C | — |
| Specific Heat | 450 J/kg·K | — |
High-Temperature Strength Retention
| Temp (°C) | Tensile Str. (MPa) | Yield Str. (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 760 | 360 | 50 |
| 200 | 680 | 300 | 52 |
| 400 | 610 | 260 | 55 |
| 600 | 550 | 220 | 58 |
Heat Treatment
Hastelloy G-30 is used in the solution-annealed condition to provide maximum corrosion resistance and structural uniformity.
- Solution Annealing Temperature: 1121°C – 1177°C (2050°F – 2150°F).
- Soaking Time: 30 to 60 minutes per inch of thickness.
- Cooling Method: Rapid air cool or water quench. Rapid cooling is essential to prevent the precipitation of secondary phases at the grain boundaries, which can reduce ductility and increase corrosion rates in nitric acid.
- Grain Size Control: Shanghai Hangbo utilizes precise thermal cycles to ensure an ASTM grain size of No. 5 or finer, ensuring optimum toughness and uniform corrosion response across the material surface.
- Microstructural Effect: Produces a stable, single-phase FCC matrix with all primary alloying elements (Cr, Mo, W) in solid solution.
How Shanghai Hangbo Produces Hastelloy G-30
1. Round Bars & Forgings
- Refined Melting: Vacuum Induction Melting (VIM) followed by Electroslag Remelting (ESR) for ultra-low carbon (≤0.03%) and precise Chromium-Iron balance.
- Forging: Precision hot forging in the 1000–1200°C window to refine the dendritic structure and ensure isotropic properties.
- Annealing: Computer-monitored solution annealing at 1150°C followed by high-pressure water quenching.
- Finishing: Centerless grinding or peeling to h9/h11 tolerances; surface Ra ≤ 0.8 µm.
2. Seamless Tubes & Pipes
- Extrusion: High-purity ESR billets hot-extruded at 1100°C to form mother tubes.
- Cold Processing: Precision multi-pass cold drawing or pilgering to reach final dimensions (OD 6mm–219mm).
- Hydrogen Annealing: Solution annealing in a protective hydrogen atmosphere for a bright, passive surface.
- NDT Verification: 100% Eddy Current and Hydrostatic testing to ensure integrity in acid gas environments.
3. Plates, Sheets & Strips
- Rolling: Hot rolling of slabs followed by precision cold rolling for smooth finish.
- Surface Quality: Solution annealing followed by specialized chemical pickling or bright annealing.
- Flatness: Levelling to ≤ 3 mm/m flatness for precision vessel construction.
- Cutting: Custom cut-to-size using waterjet or laser cutting to prevent sensitization of the edges.
Industry Applications
| Industry | Typical Component | Why Hastelloy G-30? |
|---|---|---|
| Fertilizer Production | Phosphoric acid evaporators, agitators | Best-in-class resistance to wet-process P2O5. |
| Nuclear Fuel Reprocessing | Dissolvers, heating coils, vessels | Outstanding resistance to concentrated nitric acid. |
| Chemical Processing | Mixed-acid piping, pickling tanks | Resists nitric, sulfuric, and hydrochloric acid blends. |
| Mining | Autoclaves for gold and base metal recovery | Durable in high-pressure oxidizing acid leaching. |
| Waste Treatment | Hazardous waste incinerator components | Exceptional stability in mixed corrosive gases. |
| Agrochemicals | Pesticide manufacturing equipment | Handles aggressive chloride-contaminated acids. |
Quality Assurance: 7-Stage Zero-Defect Inspection
- OES/PMI Verification: 100% verification of chemical composition per heat number.
- Hardness Testing: Verification of solution-annealed state (≤ 100 HRB) across the section.
- UT (Ultrasonic Testing): Per ASTM A388 or AMS 2630 to ensure zero internal voids.
- Corrosion Resistance Test: Periodic verification via G48 pitting tests or nitric acid immersion tests.
- Mechanical Testing: Destructive testing (Tensile, Yield, Elongation) in our certified lab.
- Grain Size Inspection: Per ASTM E112 to ensure No. 5 or finer.
- Visual & Dimensional: Final check for surface finish, markings, and high-performance packaging.
Deliverables: ISO 9001:2015 certificate, EN 10204 3.1 MTC, and SGS/BV/TÜV reports on request.
Frequently Asked Questions
Q1: What is Hastelloy G-30 used for?
Hastelloy G-30 is primarily used for components in highly oxidizing acid environments, such as wet-process phosphoric acid evaporators, nitric acid dissolvers in nuclear fuel reprocessing, and pickling equipment in the chemical industry.
Q2: What is the density of Hastelloy G-30?
The density of Hastelloy G-30 is 8.22 g/cm³ (0.297 lb/in³).
Q3: What is the maximum service temperature of Hastelloy G-30?
For structural or pressure vessel applications, it is typically used up to 427°C (800°F). It can withstand higher temperatures for oxidation resistance alone, but its primary value is aqueous corrosion resistance.
Q4: What is the melting point of Hastelloy G-30?
Hastelloy G-30 has a melting range of 1330°C to 1370°C (2425°F to 2500°F).
Q5: What is the tensile strength of Hastelloy G-30?
In the solution-annealed condition, Hastelloy G-30 provides a minimum room-temperature tensile strength of ≥ 690 MPa (100 ksi).
Q6: What is the yield strength of Hastelloy G-30?
The yield strength (0.2% offset) of annealed Hastelloy G-30 is typically ≥ 283 MPa (41 ksi) at room temperature.
Q7: What is the elongation of Hastelloy G-30?
Hastelloy G-30 offers excellent ductility, with a typical elongation of ≥ 40% in the annealed condition.
Q8: What are the full mechanical properties of Hastelloy G-30?
Hastelloy G-30 is characterized by its versatile strength (690 MPa UTS), reliable yield (283 MPa), and high elongation (40%), combined with the industry's best resistance to oxidizing acid mixtures.
Q9: What heat treatment does Hastelloy G-30 require?
It requires solution annealing at 1121°C – 1177°C followed by a rapid air cool or water quench.
Q10: What is the solution annealing temperature for Hastelloy G-30?
The standard solution annealing temperature range is 1121°C to 1177°C (2050°F to 2150°F).
Q11: How does Hastelloy G-30 compare to Hastelloy C-276?
Hastelloy G-30 is significantly superior to C-276 in wet-process phosphoric acid and concentrated nitric acid due to its much higher chromium content (30% vs 16%). C-276 is generally better for reducing environments like hydrochloric acid.
Q12: What is the price of Hastelloy G-30 per kg?
Pricing is influenced by the current nickel and chromium market prices. Please contact Shanghai Hangbo Alloy Group at hangbo@nickel-alloy.com for a real-time competitive quote.
Q13: Is Hastelloy G-30 weldable?
Yes, Hastelloy G-30 has excellent weldability. Its low carbon content and stable chemistry prevent carbide precipitation during welding, allowing its use in the as-welded condition. Matching filler wire is recommended.
Q14: What product forms does Shanghai Hangbo supply?
We supply Hastelloy G-30 in round bars (6mm–400mm), seamless tubes, plates, sheets, and wire.
Q15: Does Shanghai Hangbo ship internationally?
Yes. We export to over 32 countries with full customs support and door-to-door delivery options (DDP/DAP).
Q16: Why is G-30 better than stainless steel for phosphoric acid?
G-30 contains 30% chromium and significant molybdenum, providing a passive film that is far more stable in phosphoric acid contaminated with fluorides and chlorides than any standard stainless steel.
Q17: Is Hastelloy G-30 magnetic?
No, Hastelloy G-30 is a non-magnetic superalloy.
Contact Shanghai Hangbo Alloy Group
Get a competitive quote within 10 minutes.
| Channel | Details |
|---|---|
| Website | www.nickel-alloy.com |
| specialalloy001@gmail.com | |
| Email 2 | hangbo@nickel-alloy.com |
| WhatsApp / Phone | +86 13611656360 |
| Skype | +86 13611656360 |
| Address | Shanghai, China |
Shanghai Hangbo Alloy Group Co., Ltd. — Your Specialist Partner for Phosphoric & Nitric Acid Resistance.
