Hastelloy G-30: The Phosphoric Acid-Resistant Superalloy Guide
Wet-process phosphoric acid — the acid used to make DAP, MAP, and TSP fertilizers — is one of the most corrosive environments in the chemical industry. Hastelloy G-30 (UNS N06030) was developed specifically for this service. This guide covers the chemistry, ASTM B575 specification, G-30 vs C276 comparison, and the practical service limits in 28–54% P₂O₅ wet-process acid with chlorides and fluorides.
Table of Contents
- Why Phosphoric Acid Eats Metal
- Hastelloy G-30: Designed for Wet-Process H₃PO₄
- Chemical Composition (UNS N06030)
- ASTM B575 / B622 / B626 Product Forms
- G-30 vs C276: Head-to-Head
- G-30 vs Alloy 20: When to Switch
- G-30 vs G-35: The New Generation
- Corrosion Data in Wet-Process Acid
- Applications in Phosphate Fertilizer Plants
Why Phosphoric Acid Eats Metal
Phosphoric acid is unique in its corrosivity because the industrial product is not the pure reagent-grade H₃PO₄ you can buy from a lab supplier. Wet-process phosphoric acid (WPA) — produced by digesting phosphate rock with sulfuric acid — contains a long list of contaminants that make it far more aggressive than pure H₃PO₄:
- Free sulfuric acid (1–4% H₂SO₄): the digestion acid that was not fully consumed.
- Fluorides (1–3% F⁻ as HF, H₂SiF₆, fluorosilicates): from the fluorapatite mineral in the rock.
- Chlorides (0.1–1% Cl⁻): from the rock and from the sulfuric acid.
- Suspended solids (gypsum, silica, undigested rock): 10–30% by weight: high-velocity erosion.
- Aluminum, iron, magnesium, sodium, potassium, uranium: from the rock, present as dissolved ions.
The result is an acid that is hot (60–110°C), concentrated (28–54% P₂O₅), aerated, chloride- and fluoride-bearing, with high solids content. 316L stainless fails in months. 904L fails in 1–2 years. Alloy 20 lasts 5–10 years. Hastelloy G-30 typically delivers 15+ years of service life in the most aggressive positions in a DAP/MAP plant.
Hastelloy G-30: Designed for Wet-Process H₃PO₄
G-30 (UNS N06030) was developed by Haynes International in the 1980s specifically as an upgrade to G-3 (UNS N06985) for the phosphate fertilizer industry. The alloy is a Ni-Fe-Cr-Mo-Cu-W alloy with the right balance of Cr (for oxidizing-acid resistance), Mo (for reducing-acid resistance), and Cu (for sulfuric acid resistance) — without the tungsten content of C276 that makes welding more difficult.
G-30 Design Priorities
Optimize for: 30–55% H₃PO₄, 60–110°C, with 1–3% F⁻ and 0.1–1% Cl⁻, plus 1–4% residual H₂SO₄ and entrained solids.
Original Application
Phosphoric acid evaporators, agitator shafts, attack tank piping, filter underflow piping, and the 28% → 54% P₂O₅ concentration train.
Best Today
Replacement of Alloy 20 and C276 in WPA service. Welded construction with ERNiCrMo-11 or matching G-30 filler.
Chemical Composition (UNS N06030)
| Element | G-30 (N06030) | Function |
|---|---|---|
| Nickel (Ni) | 43.0 min (typically 50–55) | Austenite stability, SCC resistance |
| Chromium (Cr) | 28.0 – 31.5 | Oxidizing acid resistance (key) |
| Iron (Fe) | 13.0 – 17.0 | — |
| Molybdenum (Mo) | 4.0 – 6.0 | Reducing acid + Cl⁻ resistance |
| Tungsten (W) | 1.5 – 4.0 | Additional pitting resistance |
| Copper (Cu) | 1.0 – 2.4 | H₂SO₄ resistance (key) |
| Niobium (Nb) | 0.30 – 1.50 | Carbide stabilization |
| Carbon (C) | 0.03 max | — |
| Mn / Si / S / P | ≤ 1.5 / ≤ 0.8 / ≤ 0.02 / ≤ 0.04 | Residual limits |
| PREN (typical) | ~45 | — |
Three features stand out: 30% Cr (very high — gives the alloy resistance to oxidizing conditions like concentrated HNO₃ and F⁻-rich acid), 2% Cu (resistance to H₂SO₄ in the digestion acid), and 5% Mo + 2.5% W (resistance to Cl⁻ and reducing acid).
ASTM B575 / B622 / B626 Product Forms
| Product Form | ASTM Specification | Typical Sizes |
|---|---|---|
| Plate, sheet, strip | B575 | 0.5 to 50 mm thick |
| Seamless pipe & tube | B622 | 1/2″ to 12″ NPS |
| Welded pipe & tube | B626, B619 | 1/2″ to 48″ NPS |
| Bar | B581 (or B574 for round bar) | 6 to 300 mm round |
| Forgings & fittings | B462, B366 | 1/2″ to 24″ NPS, 150#–600# |
ASME “SB” versions are required for Section VIII pressure-vessel service. Welding electrode per SFA-5.11 is ENiCrMo-11; per SFA-5.14 is ERNiCrMo-11. Both are available from Special Metals, Haynes, and select European mills.
G-30 vs C276: Head-to-Head
| Property | G-30 (N06030) | C276 (N10276) |
|---|---|---|
| Ni content | ~53% | ~57% |
| Cr content | 30% (high) | 15.5% (lower) |
| Mo content | 5% | 16% (high) |
| W content | 2.5% | 3.5% |
| Cu content | 2% (deliberate) | < 0.5% |
| PREN | ~45 | ~45 |
| Best at: | Oxidizing acid, F⁻, H₂SO₄ + HNO₃ mix | Reducing acid, hot HCl, severe Cl⁻ |
| Weldability | Good — better than C276 | Good — but prone to HAZ cracking if contaminated |
| Cost (relative) | 1.0× (baseline) | 1.1–1.2× |
Where G-30 wins
- Wet-process phosphoric acid (any concentration, any temperature, with F⁻ + Cl⁻)
- Concentrated HNO₃ + HF pickling (semiconductor, stainless)
- Sulfuric + nitric mixed acid (metal finishing)
- Phosphate fertilizer evaporator tubes
Where C276 wins
- Hot concentrated HCl (any concentration above 10%)
- Wet FGD scrubber with reducing-acid conditions
- Severe chloride with no oxidizer
- Any environment where the Cr is consumed and only Mo+W can save you
G-30 vs Alloy 20: When to Switch
Alloy 20 (UNS N08020) is the previous-generation WPA material. The upgrade rule of thumb:
| Service | Alloy 20 | G-30 |
|---|---|---|
| Filter acid (28% P₂O₅, 75°C, with F⁻ + gypsum) | 1.0–1.5 mm/yr | 0.1–0.3 mm/yr |
| Evaporator inlet (40% P₂O₅, 90°C) | 1.5–2.5 mm/yr | 0.2–0.5 mm/yr |
| Evaporator outlet (54% P₂O₅, 110°C) | > 3 mm/yr (fail) | 0.5–1.0 mm/yr (acceptable) |
| Product acid storage (54% P₂O₅, 50°C) | 0.5–1.0 mm/yr | < 0.2 mm/yr |
G-30 vs G-35: The New Generation
Hastelloy G-35 (UNS N06035) is the latest-generation upgrade to G-30, with even higher Cr (33%) and lower Fe (≤ 2%) to handle the new “cleaner acid” WPA chemistries used in high-purity phosphate applications (lithium-iron-phosphate batteries, food-grade phosphates).
| Property | G-30 | G-35 |
|---|---|---|
| Cr | 30% | 33% |
| Mo | 5% | 8% |
| Fe | 15% | ≤ 2% |
| WPA service life (years) | 10–15 | 15–25 |
| Best for | Standard WPA, evaporator | High-purity, hot concentrated WPA, FGD + Cl⁻ |
| Indicative price (USD/kg) | ~$40 | ~$55 |
For new DAP/MAP plant construction, G-35 is the modern standard. For repair and replacement of existing G-30 equipment, G-30 remains cost-effective and readily available.
Corrosion Data in Wet-Process Acid
| Acid Composition | Temperature | Alloy 20 | C276 | G-30 | G-35 |
|---|---|---|---|---|---|
| 28% P₂O₅, 2% H₂SO₄, 1% F⁻ | 75°C | 0.8 mm/y | 0.3 mm/y | 0.15 mm/y | 0.10 mm/y |
| 40% P₂O₅, 1% H₂SO₄, 0.5% F⁻ | 90°C | 2.0 mm/y | 0.5 mm/y | 0.25 mm/y | 0.15 mm/y |
| 54% P₂O₅, 0.5% H₂SO₄, 0.2% F⁻ | 110°C | 3.5 mm/y (fail) | 0.7 mm/y | 0.4 mm/y | 0.25 mm/y |
| 30% P₂O₅ + 5% HNO₃, 50°C | — | 1.5 mm/y | 2.0 mm/y (C276 is reduced in oxidizing) | 0.3 mm/y | 0.2 mm/y |
Applications in Phosphate Fertilizer Plants
Attack Tank Agitators & Shafts
Mixing phosphate rock with sulfuric acid. The most aggressive position in the plant — 80°C, 30% solids, fluoride + chloride. G-30 last 10+ years vs Alloy 20’s 2–3 years.
Filter Acid Piping
From the horizontal belt filter to the evaporator. 28% P₂O₅ at 70°C with gypsum slurry. G-30 is the global standard; some plants use rubber-lined carbon steel as a lower-cost alternative.
Evaporator Tube Bundles
Multiple-effect evaporator concentrating 28% → 54% P₂O₅. Tubes see increasing temperature and acid concentration as they climb the effects. G-30 tube life: 12–18 years.
Clarifier & Thickener Internals
Rakes, drive shafts, feed wells. G-30 castings (CW-2M equivalent) are available for thickener drive mechanisms.
Product Acid Storage Tanks
54% P₂O₅ merchant-grade acid at ambient. G-30 or rubber-lined CS; Alloy 20 is marginal at this concentration.
DAP / MAP Reactor Internals
Phosphoric acid + ammonia reaction. Corrosive slurry at 80–100°C. G-30 reactor internals; in some positions, glass-lined CS is used.
Detailed Corrosion Rates: G-30 in the Full WPA Process Stream
The wet-process phosphoric acid (WPA) plant contains multiple unit operations, each with its own corrosive fingerprint. A single alloy rarely covers the entire plant — G-30 is specified for the most aggressive sections and a less expensive alloy (Alloy 20, 904L, or 316L) for the rest:
| Plant Location | Corrosive Species | T (°C) | G-30 Rate (mm/y) | C276 Rate (mm/y) | Recommendation |
|---|---|---|---|---|---|
| Phosphate rock slurry piping | H₃PO₄ + H₂SO₄ + solid rock fines (abrasive) | 40–60 | < 0.05 | < 0.05 | Both OK; Alloy 20 cheaper choice |
| Reaction (attack) tank — vapor space | HF + SiF₄ vapor; no liquid contact | 75–85 | 0.02 | < 0.02 | G-30 preferred (cheaper than C276) |
| Reaction tank — submerged | 30% P₂O₅ + 3% H₂SO₄ + 1.5% F⁻ + 1% Cl⁻ + gypsum solids | 75–85 | 0.08 | 0.05 | G-30 sufficient; C276 overkill |
| Filter acid — filtrate side | 28% P₂O₅ + 2% H₂SO₄ + 0.5% F⁻ + 0.5% Cl⁻ | 60–70 | 0.05 | < 0.05 | Alloy 20 for piping; G-30 for critical areas |
| Filter acid — under gypsum cake (crevice) | Same as above + stagnant conditions | 60–70 | 0.15 | 0.08 | G-30 minimum; crevice risk is real |
| Evaporator — first effect tubes (forced circulation) | 40% P₂O₅ at ~105°C + F⁻ + Cl⁻ + gypsum scale | 105–115 | 0.25 | 0.12 | G-30 or C276 mandatory. Alloy 20 fails above 80°C here |
| Evaporator — second effect (lower T) | 45% P₂O₅ at ~85°C | 85 | 0.12 | 0.06 | G-30 acceptable; C276 preferred for long life |
| Concentrated acid storage tank (54% P₂O₅) | 54% P₂O₅ + residual F⁻ + Cl⁻; stagnant | 40–50 | 0.03 | 0.02 | 316L + rubber lining is standard. G-30 / C276 for unlined option |
| Fluosilicic acid recovery condenser | 18–22% H₂SiF₆ (from scrubber water) + 1% H₂SO₄ | 50–70 | 0.06 | < 0.05 | G-30 best balance of cost/resistance |
Fabrication of Hastelloy G-30: Welding, Forming & Machining Guide
G-30 is a fully austenitic solid-solution alloy, which makes it fundamentally easier to weld than precipitation-hardenable or duplex grades — but it has its own specific requirements:
Welding
- Processes: GTAW (TIG) preferred for root passes and thin sections; GMAW (MIG) for fill passes on thick sections; SMAW (stick) for field repair — all standard.
- Filler metal: ERNiCrMo-11 (AWS A5.14) for TIG — this is the matching filler. ERNiCrMo-3 (Inconel 625 filler) is an acceptable alternative for dissimilar-metal welds to carbon steel or 316L but NOT for matching G-30-to-G-30 welds in corrosive service (the lower Mo and absence of W in 625 filler will make the weld metal the weak link).
- Shielding gas: 100% argon for GTAW; 75%Ar/25%He or 100% Ar for GMAW. No hydrogen additions — hydrogen in the shielding gas increases the risk of hot-cracking in high-Ni alloys.
- Preheat: Not required. Interpass temperature: ≤ 150°C. Lower is better — 100°C max for thin sections.
- Post-weld heat treatment: Not required. G-30 is solid-solution strengthened and the as-welded condition meets all ASTM requirements.
- Hot cracking risk: Low compared to precipitation-hardenable nickel alloys, but still a concern in highly restrained, thick-section welds (≥ 25 mm). Use stringer-bead technique and minimize weld-pool size.
Forming
- Cold forming: G-30 work-hardens at a moderate rate — about 1.5× that of 316L. Intermediate annealing is recommended after ~20% cold reduction for complex shapes.
- Hot forming: 870–1,150°C, followed by re-solution-anneal at 1,121°C and water quench. Hot forming below 870°C risks sigma-phase formation (G-30 has ~6% Mo, and sigma can precipitate in the 650–900°C range if held too long).
Machining
- Machinability rating: ~20% of B1112 free-cutting steel — similar to 316L but with slightly higher tool wear.
- Use rigid setups, positive-rake carbide tools (C-2 or C-3 grade), and abundant sulfurized cutting oil.
- Speeds: 12–18 m/min for HSS tools, 30–45 m/min for carbide — 30–50% lower than for 316L to control work-hardening.
G-30 vs G-35: When to Upgrade to the Next Generation
Hastelloy G-35 (UNS N06035) was developed by Haynes International in the early 2000s as an improvement on G-30 for the most aggressive WPA and mixed-acid environments. Key differences:
| Property | G-30 (N06030) | G-35 (N06035) | Benefit of G-35 |
|---|---|---|---|
| Cr content | 28–31.5% | 31–34% | Higher Cr improves oxidizing-acid resistance |
| Mo content | 4–6% | 7–9% | Higher Mo improves chloride pitting resistance |
| PREN (typical) | ~46 | ~58 | G-35 approaches C276 (PREN ~65) |
| Cost vs G-30 | 1.0× | ~1.3× | 30% premium |
| Availability | Good (stock at major distributors) | Limited (mill lead 12–16 weeks) | G-30 still the default for most WPA projects |
Recommendation: Specify G-35 when the evaporator acid temperature exceeds 110°C, when the chloride content is > 2%, or when the plant design life exceeds 25 years. For most standard WPA plants, G-30 remains the proven, cost-effective choice — and is available from stock at Huaxiao Alloy in plate, sheet, pipe, and welding consumables.
Welding Filler Metal Selection for G-30 — The Complete Guide
Selecting the right filler metal for Hastelloy G-30 welding is critical — using the wrong filler can create a weld that is 10–100× more corrosion-prone than the base metal. Here is the complete filler metal guide:
| Service Environment | Recommended Filler (TIG) | AWS Spec | Why |
|---|---|---|---|
| G-30 to G-30, WPA service (matching) | ERNiCrMo-11 | A5.14 | Matching chemistry — especially W content critical for H₃PO₄ resistance |
| G-30 to 316L (dissimilar) | ERNiCrMo-3 (625 filler) | A5.14 | Ni-rich filler absorbs dilution from both sides without cracking |
| G-30 to carbon steel (dissimilar) | ERNiCrMo-3 (625 filler) | A5.14 | Carbon steel dilution into a Ni-rich weld is safe; reverse is not |
| G-30 to Alloy 20 | ERNiCrMo-3 (625 filler) | A5.14 | Both sides dilute into the high-Ni weld without sigma or cracking risk |
| G-30 to C276 | ERNiCrMo-4 (C276 filler) | A5.14 | C276 filler “overalloys” the G-30 side — safe and widely practiced |
| G-30 weld overlay (buttering) on carbon steel | ERNiCrMo-11 (first layer) then ERNiCrMo-3 (build-up) | A5.14 | First layer must be W-bearing to maintain corrosion resistance at the overlay surface |
G-30 Equipment Examples in Real Fertilizer Plants
Several case studies from operating phosphate fertilizer plants illustrate where G-30 is specified vs where it is not needed:
Case 1: Florida DAP Plant — Evaporator Tube Replacement (2016)
A DAP (diammonium phosphate) plant in Central Florida had been using Alloy 20 tubes in their first-effect phosphoric acid evaporator (30% P₂O₅ → 40% P₂O₅ at 105°C). Tube failures occurred every 3–4 years, primarily pitting under gypsum deposits on the shell side. In 2016, the plant replaced the evaporator tube bundle with G-30 tubes. After 8 years, zero tube leaks — the first time this evaporator had gone more than 4 years without a retube. The G-30 bundle cost ~40% more than the Alloy 20 bundle but will pay for itself within the second retube cycle.
Case 2: Morocco MAP Plant — Filter Acid Piping (2019)
An MAP (monoammonium phosphate) plant in Morocco experienced through-wall corrosion in Alloy 20 filter-acid piping after just 18 months. Investigation revealed that the phosphate rock feedstock had changed to a higher-chloride source, pushing the acid chloride from ~0.3% to ~1.8%. Alloy 20’s PREN of ~28 was no longer sufficient. The plant replaced the affected piping with G-30, which has been clean after 5 years. Total cost of the piping replacement was $120k — less than the cost of one unplanned shutdown.
Case 3: Saudi Arabia — Sulfuric Acid Cooler Plates (2021)
A sulfuric acid plant in Saudi Arabia used Alloy 20 plate-type acid coolers for 93% H₂SO₄ at the hot end (~110°C inlet). After 7 years, pitting appeared at the plate-to-gasket crevice — the stagnant acid under the gasket concentrated by evaporation during shutdowns. The plant replaced the cooler plates with G-30 (which has better crevice-corrosion resistance than Alloy 20 due to higher Cr and Mo), and has had no issues for 4 years and counting.
Phosphate Fertilizer Market Trends Driving G-30 Demand
The global phosphate fertilizer market is shifting toward lower-grade, higher-contaminant phosphate rock as high-grade reserves in Florida, Morocco, and China are depleted. This trend will increase demand for G-30 and G-35 because:
- Higher chloride in the rock: Lower-grade rock contains more NaCl and KCl (from seawater intrusion in marine-origin deposits). Chloride in the WPA stream increases from 0.5% (Florida 68 BPL rock) to 2–3% (lower-grade 60–64 BPL). Alloy 20 cannot handle > 1.5% Cl⁻ in WPA; G-30 is required above ~1% Cl⁻.
- Higher fluoride: Lower-grade rock also contains more fluorine. G-30’s higher Cr content provides marginally better F⁻ resistance.
- Higher solids: Lower-grade rock means more gypsum byproduct per ton of P₂O₅ produced — increasing the erosion-corrosion component. G-30’s higher hardness (~200 HB, vs ~160 HB for Alloy 20) improves erosion resistance.
Why Choose Huaxiao Alloy for Your Hastelloy G-30 Procurement
Mill-Direct Pricing
We source directly from producing mills in the USA, Europe, and Japan — no middlemen. This means mill-certified material at competitive pricing with full traceability from melt to shipment.
Full Certification Package
Every shipment includes the original mill test certificate (MTC) to EN 10204 3.1 standard. EN 10204 3.2 with third-party witness (SGS, BV, TÜV, Lloyd’s) is available for critical service.
100% PMI on Every Shipment
We perform Positive Material Identification (XRF) on every piece before it leaves our warehouse — not just a statistical sample. Your material is correct, guaranteed.
Global Logistics
Fast shipping to all major industrial hubs — Houston, Rotterdam, Singapore, Dubai, Shanghai, Mumbai. Air freight available for urgent requirements.
Metallurgical Support
Our in-house metallurgists respond within 1 business hour to material selection questions, welding procedure reviews, and failure analysis requests — at no charge.
Custom Processing
Cut-to-length, beveling, machining, and heat treatment services available. We can supply material ready for your fabricator with zero additional shop preparation required.
G-30 Stock Availability and Procurement Lead Times
| Product Form | Typical Availability | Stock Sizes | Mill Lead Time (non-stock) |
|---|---|---|---|
| Plate (B575) | Limited stock at major distributors | 3–25 mm thick, up to 2,000 mm wide | 10–14 weeks |
| Sheet (B575) | Limited stock | 0.8–3.0 mm thick, up to 1,200 mm wide | 8–12 weeks |
| Seamless pipe (B622) | Very limited stock; mostly mill-order | 1/2″ to 4″ NPS, Sch 10S/40S | 14–18 weeks |
| Welded pipe (B626) | Limited stock; shop-fabricated from plate | 4″ to 24″ NPS | 6–10 weeks |
| Seamless tube (B622) | Mill order only | 1/2″ to 2″ OD | 16–20 weeks |
| Bar (B574) | Limited stock | 12–150 mm diameter | 10–14 weeks |
| Welding wire (ERNiCrMo-11) | Stock at specialty distributors | 1.6, 2.4, 3.2 mm | 4–6 weeks |
G-30 is a specialty grade — not a commodity like 316L or even Alloy 20. Procurement teams should plan for 3–4 month lead times for mill-order material and always maintain an in-plant spare inventory of the most critical G-30 components (pump impellers, agitator blades, critical flanges) to avoid a single-point failure during an unplanned outage.
FAQs About G-30 Procurement and Service
Does Huaxiao Alloy stock Hastelloy G-30?
Can G-30 be used instead of Alloy 20 to extend equipment life?
What is the minimum order quantity for G-30?
Extended FAQ — G-30 Selection and Service
What is the temperature limit for Hastelloy G-30 in continuous service?
Can G-30 plate be formed into a dished head?
Is Hastelloy G-30 available as castings?
G-30 Alternatives: When to Use Each Alloy in WPA Service
G-30 is not the only option for phosphoric acid service, and it’s not always the best economic choice. Here is a decision matrix that matches the service condition to the lowest-cost alloy that meets the corrosion requirements:
| Service Condition | Lowest-Cost Acceptable Alloy | When to Upgrade to G-30 | When to Upgrade Beyond G-30 |
|---|---|---|---|
| WPA slurry, 30% P₂O₅, 75°C, no chlorides | Alloy 20 (N08020) | If temperature > 85°C or expected life > 15 years | Rarely needed at this condition |
| WPA with 0.5–1.0% Cl⁻, 75°C | Alloy 20 | If Cl⁻ > 1.0% or crevice conditions present | G-35 if Cl⁻ > 2.0% |
| WPA with 1–2% Cl⁻, 85–105°C (evaporator) | G-30 | Default choice — G-30 was designed for this | C276 or G-35 if Cl⁻ > 2.5% |
| WPA with 2–4% Cl⁻, 105–120°C | G-35 (N06035) | G-35 is the baseline here — G-30 may be marginal | C276 for the most severe conditions |
| H₂SO₄, 30%, 60°C | Alloy 20 | If chlorides > 500 ppm present | C276 if > 2,000 ppm chlorides |
| H₂SO₄, 70%, 80°C | G-30 | G-30 or 825 — performance similar; choose by availability | C276 if reducing contaminants present |
| H₂SiF₆, 20%, 70°C (fluosilicic acid) | G-30 | Best cost-performance balance for this medium | C276 for the condenser outlet at the hottest point |
Source Hastelloy G-30 from Huaxiao Alloy
We stock G-30 plate (3–25 mm thick), sheet (0.8–2.0 mm), and ERNiCrMo-11 welding wire. For pipe, tube, bar, and large-plate orders, we arrange mill-direct delivery with full EN 10204 certification. Our metallurgists can review your WPA or sulfuric acid service conditions and confirm whether G-30 is the right choice — or whether a lower-cost alternative (Alloy 20, 825) or a higher-performance option (G-35, C276) is more appropriate.
Frequently Asked Questions
What is the difference between G-30 and C276?
Is G-30 weldable?
Can I substitute Alloy 20 with G-30 in an existing evaporator?
What is the cost of G-30 vs C276?
Is G-30 resistant to hydrofluoric acid?
What is the maximum service temperature for G-30 in phosphoric acid?
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