GH3030 Bar

GNEE Alloy GH3030 Bar

 

GH3030 bar stock is a nickel-chromium based solid solution strengthened superalloy bar, internationally equivalent to Nimonic 75 (Alloy 75). It is one of the most reliable materials for high-temperature structural components, possessing excellent oxidation resistance, thermal fatigue strength, and ease of machining.

 

Gnee Steel, as a professional manufacturer of GH3030 bar stock, provides high-quality bars that maintain structural stability at temperatures up to 800°C (1472°F) and maintain oxidation resistance at temperatures up to 1000°C (1832°F). Our bars are ideal for aero-engine fasteners, industrial furnace hangers, and high-temperature support pins.

No middlemen! We offer factory-direct wholesale prices for GH3030 steel bars, 100% traceable.

Contact us now to get an export quote for GH3030 Bar

Available sizes and supply range for GH3030 bars

We stock and manufacture GH3030 bars in various diameters and finishes to suit your machining requirements.

Round Bar (Hot Rolled): Diameter 10 mm – 80 mm

Forged Bar (Large Diameter): Diameter 80 mm – 450 mm

Precision Bright Rod: Diameter 2 mm – 25 mm (h9, h10, h11 tolerance)

Surface Finishes: Black (Forged), Peeled (Turned), Polished, or Centerless Ground.

Length: Standard 3m – 6m or Precision Cut-to-Length services.

Black (forging)

Peeling (turning)

Polishing

Centerless grinding

Specifications : GB/T 14994

Grade: GH3030

Length : Required Length

Round Bar Diameter : 4.00 mm to 400 mm

Bright Bar : 4mm – 150mm,

Surface Finish : Black, Bright, Polished

Form : Round, Billet, Ingot, Forging Etc.

GH3030 Bar Chemical Composition (%)

Our GH3030 material is melted via VIM + ESR for ultra-high purity and consistency.

Alloy GH3030 Round Bar Mechanical Properties

Tested according to GB/T 14992 and international standards.

High temperature GH3030 Alloy Round Bar Physical Constants

Precision manufacturing begins with precise materials planning. At Gnee Steel, we offer a wide range of GH3030 (Alloy 75) round bars with various finishes-from hot-rolled to precision ground-to meet your precise engineering needs.

GH3030 alloy rod material density and calculation formula

To assist in your logistics and cost estimation, our GH3030 round bar weights are calculated based on the following:

Density: 8.4 g/cm³

Weight Calculation Formula:

Weight ( kg/m ) = Diameter² (mm) × 0.00660

(Example: For a 20mm bar: 20 × 20 × 0.0066 = 2.64 kg/m )

GH3030 Round Bar: Common Size & Weight Table

We maintain an extensive stock of standard sizes and offer custom forging for larger diameters.

GH3030 Bar Stock Dimensional Tolerance Standards

We offer high-precision GH3030 bar stock to minimize your processing time:

Hot-rolled bar stock: Conforms to ISO 1035/4 or GB/T 702 standards.

Forged bar stock: Standard tolerances are -0/+2mm or customized to customer specifications.

Precision ground bar stock: Tolerances up to h9, h10, or h11 levels for small diameter fasteners.

You may be looking for GH3030 bars, but most industrial projects require a comprehensive material solution. We offer a one-stop shop for the GH3030 product range:

GH3030 Plate

GH3030 Seamless Pipe

GH3030 Fittings

GH3030 Fasteners

GH3030 round bars are primarily used in the following applications

 

Aerospace: Aircraft engine pins, high-temperature bolts, fuel manifold supports, and fasteners.

Industrial furnaces: Furnace frames, radiant tube supports, and internal structural pins.

Power generation: Gas turbine internal components and steam valve stems.

Chemical industry: High-temperature catalyst support pins and fasteners for corrosive gas environments.

 

Fuel manifold support

Industrial furnace radiant tube support

Gas turbine internal components

Chemical components

 

Packaging method for Alloy 600 Bar

 

Gnee Steel uses the safest and most effective packaging methods for all types of cargo transportation. Our packaging methods include:

Wooden crates
Wooden pallets
Shrink wrap packaging
Cardboard boxes
Wooden crates (slatted)

 

Gnee Steel GH3030 Round Bar Manufacturing Process

Every step of our production line is meticulously crafted to achieve perfection:

Fine Melting: Utilizing vacuum induction melting (VIM) and electroslag remelting (ESR) technologies ensures a clean, fine-grained microstructure.

Precision Forging: High-pressure forging effectively eliminates dendrite structures, ensuring isotropic mechanical properties.

Strict Solution Treatment: Homogenization is performed at temperatures between 1120°C and 1150°C, followed by rapid cooling to lock in the optimal solution state.

100% Ultrasonic Testing: All bars with a diameter exceeding 20 mm undergo ultrasonic testing (UT) to ensure the absence of internal voids or inclusions.

Q1: How is the machinability of GH3030 bars?
A: GH3030 is a nickel-based alloy, meaning it is "stickier" and work-hardens faster than stainless steel. We recommend using carbide tools with positive rake angles and maintaining a constant feed rate to prevent surface glazing.

Q2: What is the benefit of a "Peeled" surface over a "Black" surface?
A: The peeled (turned) surface removes the oxidation layer and surface decarburization from forging/rolling. It allows for immediate precision machining and reveals any surface defects before you begin your processing.

Q3: Can GH3030 bars be used for high-temperature springs?
A: Yes, GH3030 wire and small-diameter rods are frequently used for springs that must resist oxidation up to 800°C, though for high-stress springs, Nimonic 90 might be considered for higher creep strength.

Q4: Do you provide a Mill Test Certificate (MTC)?
A: Absolutely. Every shipment comes with a full EN 10204 3.1 MTC detailing the chemical analysis, mechanical testing, grain size, and ultrasonic inspection results.

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