In heavy industry and aerospace, a delay in the delivery of a single rebar can bring millions of dollars worth of production line downtime. Common pain points for purchasing managers when sourcing GH3030 (equivalent to Nimonic 75) include:
Long lead times: Most Tier 1 steel mills have lead times of 12-16 weeks for non-standard rebar.
Internal structural defects: Large-diameter rebar often has central voids or inclusions, defects that often only become apparent after costly processing, leading to 100% material loss.
Lack of certification: Suppliers often provide materials lacking certified MTC 3.1 traceability or international standard compliance.
At Gnee Alloy, we eliminate these bottlenecks. As a reliable supplier, we maintain a large wholesale inventory, ready to ship immediately, ensuring consistent industrial durability.
Click to get a GH3030 product quote
GH3030 high-temperature alloy bar inventory
GH3030 high-temperature alloy bar inventory
GH3030 round bars are 80Ni-20Cr solution-strengthened superalloy bars, renowned for their excellent hot strength, outstanding oxidation resistance, and high plasticity below 800℃. This alloy is supplied in forged or rolled bar form and is primarily used in the manufacture of turbine engine combustion chambers and other high-temperature, low-load industrial components.
What is GH3030 material?
GH3030 is a high-temperature nickel-based alloy, renowned for its excellent oxidation resistance, good thermal stability, and high-strength mechanical properties at high temperatures.
1. Overview of GH3030 High Temperature Alloy Bars
| Parameter | Description |
|---|---|
| Material | GH3030 |
| Product Forms | Hot Rolled Bar / Forged Bar / Cold Drawn Bar / Ground Bar |
| Material Type | Solid-solution strengthened Nickel-based Superalloy |
| Strengthening Mechanism | Cr (19-22%) + trace Ti solid-solution strengthening |
| Applicable Standards | GB/T 14994, GB/T 14997, GB/T 14998, YB/T 5249 |
| Typical Applications | Gas turbine components, high-temperature fasteners, heat treatment fixtures, furnace hardware |
| Maximum Service Temperature (Load-Bearing) | ~800°C |
| Maximum Service Temperature (Oxidation) | ~1000°C |
| Delivery Condition | Solution treated (annealed) – not age-hardenable |
2. GH3030 High Temperature Alloy 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 |
3. GH3030 High Temperature Alloy Bars - Mechanical Properties (Typical Values)
| 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
4. GH3030 bar stock supply dimensions and conditions
| Diameter (mm) | Supply State | Surface Finish | Tolerance | Commercial Advantage |
| 10mm - 80mm | Cold Drawn | Bright / Polished | h9, h10, h11 | Ready for CNC automatic feeders. |
| 85mm - 200mm | Hot Rolled | Peeled / Smooth | ± 0.5 mm | In Stock for immediate turning. |
| 200mm - 300mm | Hot Forged | Rough Machined | +2 / -0 mm | High reduction ratio; zero voids. |
5. RFQs: ХН78Т GH3030 Round bar
Dimension Unit: mm* Unless otherwise noted, the unit of measurement is mm
| Product Name | Material | Dimension | Quantity |
|---|---|---|---|
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.6 x L: | 50/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.8 x L: | 60/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.10 x L: | 77/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.20 x L: | 366/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.30 x L: | 400/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.35 x L: | 540/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.40 x L: | 1036/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.50 x L: | 350/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.55 x L: | 245/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.60 x L: | 1100/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.70 x L: | 200/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.80 x L: | 160/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.90 x L: | 150/Kilograms |
| Round Bar | ХН78Т / GH3030 View the datasheet of the steel grade | Dia.100 x L: | 3720/Kilograms |
Click to view Gnee Steel GH3030 inventory list
6. GH3030 bar industrial applications
Our Heavy-Duty GH3030 rods power the world's most critical thermal systems:
Industrial Furnaces: Radiant tubes, support rollers, and high-temp fasteners.
Aerospace: Combustion chamber liners and thermal shield structural parts.
Nuclear Power: Reactor core structural members and fasteners.
Energy: Heat exchanger supports handling oxidizing atmospheres.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️Direct Factory Price: Eliminate the 15-25% markup from international trading houses and middleman agents.
✅️Zero MOQ for Stock Items: We support both small-scale R&D validation and large-scale bulk procurement.
✅️Fast Global Shipping: Optimized logistics routes to Europe, USA, and Southeast Asia within 5-7 business days.
✅️Custom Fabrication: We offer precision Cut-to-Length services to deliver ready-to-machine blanks, minimizing your material waste.
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
We understand that internal quality is non-negotiable for turbine shafts and structural rings.
✅️100% Ultrasonic Testing (UT): Every bar produced by our factory undergoes rigorous non-destructive testing (NDT) to meet AMS 2154 Class A standards or customer-specified standards.
✅️Traceability: Each bar is marked with a heat number and accompanied by an EN 10204 3.1 factory inspection certificate (MTC).
✅️Purity: Refined using vacuum induction melting (VIM) technology to ensure extremely low trace impurity content (P, S ≤ 0.010%).
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Is GH3030 interchangeable with Nimonic 75 in my blueprint?
A: Yes. GH3030 follows the globally accepted metallurgical system designation UNS N06075. We provide a certificate confirming that its chemical composition and mechanical properties are fully compliant for your engineering review.
Q2: How do you protect the bars during international sea freight?
A: All bars are coated with anti-rust oil, wrapped in waterproof plastic, and packed in reinforced export-standard seaworthy wooden crates to ensure they arrive in Zero-Defect condition.
Q3: Can you provide bright ground bars for Swiss-lathes?
A: Absolutely. We offer Centerless Grinding to achieve h8 and h9 tolerances on smaller diameters, ensuring a Smooth Finish and zero vibration during high-speed machining.
Q4: Do you offer bulk discounts for annual MRO supply contracts?
A: Yes. As a Reliable Supplier, we provide tiered pricing and dedicated inventory reserves for our long-term project partners worldwide.
