In high-precision heat treatment, the "fire zone" harbors numerous hidden costs. For furnace manufacturers and maintenance managers, key pain points when using standard heat-resistant steels (such as 310S or 309) include:
Oxidation spalling: At temperatures above 700°C, brittle oxide scale can detach from radiant tubes or rollers. This scale settles on workpieces, causing surface pitting and high scrap rates.
Thermal sagging: Lower-grade alloys warp and sag under load, leading to conveyor blockages and costly emergency shutdowns.
At Gnee Alloy, we eliminate these risks. Our industrial-grade GH3030 bars provide a zero-pollution environment, maximizing material lifespan and ensuring structural integrity.
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GH3030 nickel-chromium alloy bars for high-temperature industrial applications
GH3030 nickel-chromium alloy bars for high-temperature industrial applications
GH3030 is a solid solution strengthened nickel-chromium-based superalloy (containing approximately 80% nickel and 20% chromium) specifically designed to enhance oxidation resistance and high-temperature thermal stability. GH3030 alloy bars exhibit excellent mechanical strength and ductility at temperatures up to 800°C and outstanding oxidation resistance at temperatures up to 1100°C.
What are the components of GH3030?
GH3030 is a solid solution strengthened high-temperature alloy, mainly composed of nickel (Ni) and chromium (Cr), with a simple chemical composition. Its typical ratio is 80% nickel and 20% chromium.
1. GH3030 High Temperature Industrial Rod Chemical Composition (wt%)
| Element | Content (%) | Notes |
|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | Matrix; high-temperature stability |
| Chromium (Cr) | 19.0 – 22.0 | Oxidation and corrosion resistance |
| Iron (Fe) | ≤ 1.5 | Strictly controlled to maintain Ni-base characteristics |
| Titanium (Ti) | 0.15 – 0.35 | Supplementary solid-solution strengthening |
| Aluminum (Al) | ≤ 0.15 | Prevents harmful phase formation |
| Carbon (C) | ≤ 0.12 | Ensures toughness and weldability |
| Manganese (Mn) | ≤ 0.70 | Deoxidizer |
| Silicon (Si) | ≤ 0.80 | Deoxidizer |
| Phosphorus (P) | ≤ 0.030 | Ensures toughness |
| Sulfur (S) | ≤ 0.020 | Ensures hot workability |
| Copper (Cu) | ≤ 0.20 | Residual element |
2. GH3030 High Temperature Industrial Rod Mechanical Properties (Typical)
| Temp (°C) | Rm (MPa) | Rp0.2 (MPa) | A (%) | Strength Retention (%) |
|---|---|---|---|---|
| 20 (RT) | ≥ 685 | ≥ 295 | ≥ 30 | 100 |
| 300 | ~620 | ~270 | ~30 | 90 |
| 400 | ~590 | ~260 | ~32 | 86 |
| 500 | ~560 | ~250 | ~35 | 82 |
| 600 | ~520 | ~240 | ~38 | 76 |
| 700 | ~450 | ~220 | ~40 | 66 |
| 800 | ~350 | ~180 | ~42 | 51 |
| 900 | ~250 | ~120 | ~45 | 36 |
Click to download the GH3030 alloy PDF file now
3. GH3030 Round Bar Main Performance Characteristics
High Temperature Strength: Maintains excellent structural integrity and creep resistance under low stress and high temperature environments.
Oxidation and Corrosion Resistance: Forms a robust protective oxide layer, protecting the material from corrosive gases and high-temperature oxidation.
Machinability and Processability: Possesses excellent cold stamping and welding properties, making it highly suitable for machining complex parts.
Metallurgical Stability: Maintains a single-phase austenitic structure during operation, preventing deterioration or embrittlement over time.
4. GH3030 Bar Physical & Mechanical Properties
| Technical Property | Value (at 20°C) | Value (at 800°C) | Industrial Advantage |
| Max Service Temp | - | 800°C - 900°C | Stable oxidation barrier. |
| Density | 8.4 g/cm³ | - | Predictable thermal mass. |
| Yield Strength | ≥ 245 MPa | ≥ 100 MPa | Resists sagging under load. |
| Tensile Strength | ≥ 590 MPa | ≥ 140 MPa | High pressure safety factor. |
| Elongation (δ5) | ≥ 35% | ≥ 50% | Elite ductility for fabrication. |
5. Industrial Applications of GH3030 High Temperature Rods
As a Reliable Supplier, we supply GH3030 rods for the most demanding furnace internals:
Radiant Tube Supports: Preventing heater sagging in high-temp gas furnaces.
Furnace Conveyor Rollers: Providing a smooth, non-scaling surface for transporting workpieces.
Muffle Furnace Internals: Ideal for bright annealing and sintering applications.
Thermal Shields & Baffles: Maintaining Structural Integrity in open-flame zones.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️VIM + ESR Melting: Our dual-vacuum refining process ensures ultra-low trace impurities (P, S ≤ 0.010%), which is the key to preventing "Hot Cracking" during welding.
✅️Wholesale Inventory: Massive stock of forged and rolled rods (10mm to 300mm) ready for Fast Global Shipping.
✅️MTC 3.1 Traceability: Full EN 10204 3.1 documentation included with every batch.
✅️Direct Factory Price: Skip the middleman markups and secure the best Cost-effective Solution for your plant overhauls.
Gnee Alloy GH3030 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Alloy GH3030 Product Packing
⚒️Gnee Alloy Production Line Equipment and Product Testing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Can GH3030 replace 310S (2520) in my furnace radiant tubes?
A: Yes, and it is a significant upgrade. While 310S is cheaper, its oxide layer is brittle and prone to flaking above 800°C. GH3030's adherent scale eliminates product contamination and offers better creep resistance at heat.
Q2: Is GH3030 easy to weld into furnace assemblies?
A: Absolutely. GH3030 is one of the most "Weld-Friendly" superalloys. It does not require complex post-weld heat treatment for static furnace parts, significantly reducing your Custom Fabrication costs.
Q3: How do you protect the bars from surface contamination during shipping?
A: Every rod is coated with a protective oil, wrapped in waterproof plastic, and packed in reinforced wooden crates to ensure your material arrives ready for installation.
Q4: Do you support small trial orders for maintenance repairs?
A: Yes. As a Reliable Supplier, we support Innovation and MRO projects. We offer Flexible MOQs on our in-stock inventory of standard diameters
