Nickel GH3030 Superalloy Pipe
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of nickel gh3030 superalloy pipe in China. If you're going to wholesale high quality nickel gh3030 superalloy pipe made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
GH3030 Seamless Pipe description
GNEE High Temperature Alloy GH3030 Seamless Pipe
GH3030 tube is a nickel-chromium based solid solution strengthened high-temperature alloy tube, commonly used in aerospace and industrial fields for seamless steel pipes operating at temperatures below 800℃-1100℃. It possesses excellent oxidation resistance, high plasticity, good cold stamping performance, and weldability. Its main applications include engine combustion chambers and heat exchangers.
Gnee Steel supplies premium GH3030 (nickel-based 75) seamless steel tubing suitable for aerospace and industrial furnace applications. It boasts oxidation resistance up to 800°C, high VIM+ESR purity, and excellent weldability. Factory direct sales, competitive pricing, and fast worldwide shipping. Get a quote now!
Do you need steel pipes with specific wall thickness or length? Gnee Steel offers custom-cut GH3030 seamless steel pipes with short lead times.
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Core Technological Advantages of GH3030 Steel Pipe
1. Excellent Oxidation Resistance
GH3030 steel pipes have a dense and highly adhesive chromium oxide (Cr2O3) layer on their surface. Unlike ordinary stainless steel, this chromium oxide layer is less prone to oxide scale formation and peeling during rapid thermal cycling, thus protecting the pipe wall from thinning and preventing product contamination.
2. Excellent Weldability and Machinability
One of the main reasons engineers choose GH3030 is its excellent weldability. It has excellent plasticity and requires no post-weld heat treatment in most applications. Its single-phase austenitic structure ensures no cracking during complex machining processes.
3. Ultra-High Purity (Vacuum Induction Melting + Electroslag Remelting)
We employ a dual refining process-vacuum induction melting (VIM) + electroslag remelting (ESR). This eliminates harmful trace impurities (P, S < 0.010%), ensuring excellent fatigue resistance and preventing hot cracking during welding.
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High temperature Alloy GH3030 Seamless Pipe Specification
| Category | Property | Typical Value / Range |
|---|---|---|
| Material | Alloy Grade | GH3030 (Chinese Superalloy) |
| Standards | Reference Standards | GB/T 14992, GB/T 14994, YB/T 5249 |
| Product Form | Tube Type | Seamless |
| Manufacturing Process | Method | Hot extrusion + cold drawing / cold pilgering |
| Surface Condition | Finish | Annealed & Pickled / Bright Annealed (BA) / Polished |
| Delivery Condition | Heat Treatment | Solution Treated / Annealed |
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Nimonic 75 Seamless Pipe Specification
GH3030 Tubing Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance (≥ 75) |
| Chromium (Cr) | 19.0 – 22.0 |
| Iron (Fe) | ≤ 1.0 (tube specification) |
| Titanium (Ti) | 0.15 – 0.35 |
| Aluminum (Al) | ≤ 0.15 |
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | ≤ 0.70 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.010 |
| Copper (Cu) | ≤ 0.007 |
GH3030 / XH78T tubing Mechanical Properties (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 |
| Modulus of Elasticity (20°C) | ~210 GPa |
High temperature performance of GH3030 tube
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 500 | ~600 | ~280 | ~25 |
| 600 | ~550 | ~260 | ~30 |
| 700 | ~450 – 500 | ~240 | ~35 |
| 800 | ~300 – 380 | ~180 | ~40 |
| 900 | ~200 – 250 | ~120 | ~45 |
GH3030 pipe corrosion resistance
| Environment | Resistance Level | Remarks |
|---|---|---|
| Oxidizing Atmospheres (air, O₂) | Excellent up to 1000°C | Forms protective Cr₂O₃ scale |
| Nitric Acid (HNO₃) | Good to Excellent | Suitable for concentrated and dilute |
| Phosphoric Acid (H₃PO₄) | Good | Limited by temperature/concentration |
| Sulfuric Acid (H₂SO₄) | Fair | Dilute, low temperature only |
| Hydrochloric Acid (HCl) | Poor | Not recommended |
| Organic Acids | Good | Suitable for food/pharmaceutical |
| Alkaline Solutions (NaOH, KOH) | Good | Resists caustic attack |
| Chloride Environments | Limited | Moderate resistance; risk of pitting in stagnant conditions |
| Sour Gas (H₂S/CO₂) | Fair | Not recommended for oil & gas service |
Click to download the GH3030 alloy PDF file now
GH3030 High Temperature Alloy Tube Key dimensions and specifications
| Parameter | Range / Tolerance |
|---|---|
| Outside Diameter (OD) | 6 mm – 200 mm |
| Wall Thickness | 0.5 mm – 15 mm |
| Length | 3000 mm – 12000 mm (custom available) |
| OD Tolerance (cold drawn) | ±0.05 – ±0.15 mm |
| Wall Thickness Tolerance | ±10% – ±12.5% |
| Straightness | ≤ 1.0 mm/m |
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Comparison of GH3030 pipe with similar seamless pipes
| Material | Key Difference vs. GH3030 | Relative Cost |
|---|---|---|
| 310S Stainless Steel | Lower strength, lower cost, similar oxidation resistance | Low |
| Inconel 600 | Similar performance, GH3030 is Chinese equivalent/alternative | Medium–High |
| GH3039 | Higher high-temperature strength (Mo + Nb + Al + Ti), similar density | Medium |
| GH3044 | Higher W content, better creep strength at 800-900°C | Medium–High |
| Inconel 625 | Superior corrosion resistance (especially chlorides), higher strength | High |
Click to contact us for recommendations of alloys suitable for your project
Products and services offered by Gnee Steel
Main Applications of GH3030 Steel Pipe
Our heavy-duty GH3030 piping is widely used in key industries worldwide:
Aerospace: Combustion chamber linings, exhaust manifolds, and turbine housings.
Industrial furnaces: Radiant tubes, muffle tubes, and heating element supports.
Petrochemicals: High-temperature reactor internals and heat exchangers.
Nuclear energy: Core structure piping and sensor protective sleeves.
Sensor protective sleeves
Packaging method for Alloy 400 Pipe
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)
Inspection and quality control standards for GH3030 seamless steel pipes
| Category | Inspection Item | Purpose & Pain Point Solution | Reference Standards |
| 1. Chemical Analysis | PMI / Spectrometric Analysis | Verified Ni, Cr, and Ti content to ensure grade authenticity and prevent material mix-ups. | ASTM E1473 / GB/T 14992 |
| Trace Element Analysis (ICP/Wet) | Strict control of P, S, Pb, and Sn to prevent welding hot cracks and ensure purity. | High-Precision Lab Standards | |
| 2. Mechanical Testing | Tensile Test (Room & High Temp) | Verifies Tensile (σb) and Yield (σp0.2) strength to ensure load-bearing capacity at 800°C. | ASTM E8 / ASTM E21 |
| Hardness Test (HB/HRC) | Confirms successful solution treatment for optimal machinability and structural stability. | ASTM E10 / ASTM E18 | |
| Flaring & Flattening Tests | Ensures high ductility for cold bending or complex fabrication without cracking. | ASTM A450 / GB/T 242 | |
| 3. Non-Destructive (NDT) | Ultrasonic Testing (UT) | Detects internal defects like cracks, slag, or voids. Mandatory for high-pressure aerospace parts. | ASTM E213 / GB/T 5777 |
| Eddy Current Testing (ET) | Scans for surface and sub-surface longitudinal defects to ensure a flawless finish. | ASTM E426 / GB/T 7735 | |
| Hydrostatic / Air-Tightness Test | Verified pressure integrity to prevent leakage in chemical reactors and heat exchangers. | ASTM A999 / GB/T 241 | |
| 4. Dimensional & Visual | Precision Dimensional Inspection | Ensures strict OD and WT tolerances (h8-h11) for seamless assembly and precision fitting. | ASTM A999 / GB/T 15062 |
| Surface Roughness Measurement | Ensures a smooth ID/OD to minimize oxidation scale buildup and improve flow efficiency. | ISO 4287 | |
| 5. Metallurgical | Grain Size Measurement | Ensures uniform grain structure (Level 5 or finer) to maximize high-temperature creep strength. | ASTM E112 / GB/T 6394 |
| Intergranular Corrosion Test | Prevents "sensitization" and sudden failure in corrosive industrial atmospheres. | ASTM A262 / GB/T 4334 |
Why Choose Us as Your Global GH3030 Supplier?
Factory Direct Pricing: Eliminate middlemen and save up to 20% on procurement costs.
MTC 3.1 Traceability: Every shipment includes a complete factory test certificate and non-destructive testing report (ultrasonic and eddy current testing).
Wholesale Inventory: We maintain a large inventory of standard specifications for fast global shipping.
Custom Processing: We offer precision cutting, bending, and special processing services based on your drawings.
GH3030 Pipe Certificate
Please contact us to get a quick quote for the Alloy GH3030 Pipe you need
We supply these GH3030 Pipe and tubes according to DIN, ISO, JIS, or ANSI/ASME standards.
FAQ
Q1: What is the maximum service temperature for GH3030 pipes?
A: For continuous service, the maximum is 800°C (1472°F). It can withstand short-term exposure up to 1000°C, but load-bearing strength will decrease significantly.
Q2: Is GH3030 equivalent to Inconel 600?
A: No. While both are nickel-based, GH3030 is more similar to Nimonic 75. It is specifically optimized for high-temperature oxidation and strength, whereas Inconel 600 is often chosen for general corrosion resistance in chemical environments.
Q3: Can you provide third-party inspections?
A: Absolutely. We regularly work with SGS, TUV, and BV to verify chemical and mechanical properties before shipping.
Q4: Do you support small-batch trial orders?
A: Yes. We support prototype development and offer flexible MOQs for non-standard sizes in our High-Quality GH3030 inventory.
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