Are you looking for high-performance nickel alloy bars that can shorten machining time? Order precision-machined GH3030 bright bars directly from our factory.
Our bars are designed for high-precision CNC machining, featuring exceptional straightness and superior surface quality. By strictly controlling the h8-h11 tolerance, we help customers minimize material waste, extend tool life, and significantly reduce overall machining costs.
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GH3030 Bright Bar Manufacturer | Precision Ground Nickel Alloy Bars | H8-H11 Tolerances
GH3030 Bright Bar Manufacturer | Precision Ground Nickel Alloy Bars | H8-H11 Tolerances
GH3030 round bars are an early type of 80Ni-20Cr solution-strengthened nickel-based superalloy bar, widely used in components requiring high thermal strength and corrosion resistance at temperatures below 800°C. The bright, precision-ground bars of this material are highly favored for their excellent surface finish, tight dimensional tolerances, and high-temperature stability in demanding applications.
What is the hardness of NIMONIC 75?
Nimonic 75 is a Nickel-based heat resistant superalloy (HRSA) material with a Machinability rating of 17% and Hardness of 90 HRB.
GH3030 Bright Bar – Properties & Specifications
| Category | Property | Typical Value / Range |
|---|---|---|
| Material | Alloy Grade | GH3030 (Chinese Superalloy) |
| Standards | Reference Standards | GB/T 14992, GB/T 14994, YB/T 5249 |
| Condition | Surface Finish | Bright / Peeled / Ground |
| Diameter Range | Common Sizes | Φ6 mm – Φ100 mm |
| Delivery Condition | Heat Treatment | Solution Treated / Annealed |
| Surface Roughness | Ra | ≤ 0.8 – 1.6 µm (ground) |
GH3030 Alloy Bar Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance (≥ 75) |
| Chromium (Cr) | 19.0 – 22.0 |
| Iron (Fe) | ≤ 1.5 |
| Titanium (Ti) | 0.15 – 0.35 |
| Aluminum (Al) | ≤ 0.15 |
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | ≤ 0.70 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Copper (Cu) | ≤ 0.20 |
Click to download the GH3030 alloy PDF file now
Mechanical properties of high-temperature alloy GH3030 bars (room temperature - solution treated)
| Property | Value |
|---|---|
| Tensile Strength, Ultimate | ≥ 685 MPa |
| Tensile Strength, Yield (0.2% Offset) | ≥ 295 MPa |
| Elongation at Break (5d) | ≥ 30% |
| Reduction of Area | ≥ 50% |
| Hardness (HBW) | ≤ 200 |
Physical properties of XH78T alloy round bars
| Property | Value |
|---|---|
| Density | 8.4 g/cm³ |
| Melting Range | 1374 – 1420°C |
| Modulus of Elasticity (20°C) | ~210 GPa |
| Thermal Conductivity (20°C) | ~14 – 15 W/m·K |
| Coefficient of Thermal Expansion (20-100°C) | 12.8 × 10⁻⁶/°C |
| Electrical Resistivity (20°C) | ~1.20 – 1.30 µΩ·m |
| Magnetic Properties | Non-magnetic |
GH3030 bar stock technical specifications: precision ground, smooth surface
As a professional manufacturer of GH3030 bright bars, Gnee Steel uses advanced centerless grinding and cold drawing processes to provide high-quality products.
| Characteristic | Specification Detail | Commercial Advantage |
| Diameter Range | 2.0mm - 100mm | Versatile for small & large parts |
| Tolerance Class | h8, h9, h10, h11 | Ready for precision collets |
| Surface Finish | Smooth Finish / Polished | Eliminates secondary grinding |
| Straightness | ≤ 0.5mm/m | High-speed machining stability |
| Material State | Solution Treated & Bright Drawn | Consistent hardness (130-180 HB) |
Advantages and Applications of GH3030 Bright Bars
Aerospace Fasteners: High-precision bolts, nuts, and studs requiring high temperature resistance.
Medical Devices: Precision components in high-temperature sterilization equipment.
Automotive: Turbocharger assemblies and high-temperature sensor housings.
Industrial Instruments: Shafts and pins for high-temperature valves and actuators.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
Gnee Steel 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 Steel GH3030 Product Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Do you offer centerless grinding for these bars?
A: Yes, we specialize in centerless grinding. We can provide Precision Ground bars with tolerances as tight as h8 or h9, ensuring the rods are perfectly suited for Swiss-type automatic lathes.
Q2: What is the standard length for your GH3030 bright rods?
A: Our standard length is 2500mm to 4000mm. However, we provide a Cut-to-Length service to meet your specific machine feeder requirements.
Q3: Can you provide bright bars with h9 tolerance in small batches?
A: Absolutely. While we are a high-volume manufacturer, we keep an active inventory of common sizes in h9 tolerance for trial orders and small-scale precision engineering projects.
Q4: Is a Mill Test Certificate (MTC) included?
A: Yes. Every shipment includes a comprehensive 3.1 MTC detailing chemical analysis, tensile strength, and exact dimensional tolerance verification.
