GH4033 Nickel Alloy Flanges
GH4033 Nickel Alloy Flanges are high-temperature nickel-chromium precipitation-hardening alloy flanges designed for demanding equipment where thermal strength, oxidation resistance, dimensional stability and reliable material traceability are required. GH4033, also known as GH33 in some Chinese material references, is a Ni-Cr based wrought superalloy strengthened by aluminum and titanium additions. It is commonly used for high-temperature load-bearing components, turbine-related parts, aerospace equipment, chemical processing systems and custom machined high-temperature alloy parts.
SAKY Alloy supplies GH4033 forged flanges, welding neck flanges, slip-on flanges, blind flanges, threaded flanges, socket weld flanges and drawing-based custom nickel alloy flanges. Products can be supplied with MTC, EN 10204 3.1 certificate, heat number control, PMI testing, dimensional inspection, third-party inspection and seaworthy export packaging according to project requirements.
Product Parameters
GH4033 Nickel Alloy Flanges are mainly supplied for high-temperature equipment connections, custom assemblies and flange components requiring nickel alloy strength at elevated temperature. Because GH4033 is not a common commodity flange material like 304 stainless steel or Inconel 625, buyers should confirm drawings, operating temperature, pressure class, flange facing, bolt hole dimensions, heat treatment condition and inspection requirements before quotation.
| Parameter | Details |
|---|---|
| Product Name | GH4033 Nickel Alloy Flanges |
| Grade | GH4033 / GH33 high-temperature nickel alloy |
| Alloy Type | Ni-Cr precipitation-hardening wrought superalloy |
| Available Flange Types | Welding neck, slip-on, blind, socket weld, threaded, lap joint and custom machined flanges |
| Size Range | NPS 1/2″ to 24″ or customized according to drawing |
| Pressure Class | Class 150, 300, 600, 900, 1500, 2500 or customized |
| Facing | RF, FF, RTJ, tongue and groove, male and female facing |
| Surface Finish | Machined, pickled, polished, blasted or customized surface |
| Tolerance | According to ASME, EN, DIN, JIS or customer drawing |
| Documents | MTC, EN 10204 3.1, PMI report, inspection report and packing list |
Chemical Composition
The high-temperature performance of GH4033 Nickel Alloy Flanges comes from the nickel-chromium matrix and precipitation strengthening by aluminum and titanium. The following chemical composition is a general reference for GH4033 alloy. Final values should be confirmed according to the purchase standard, material certificate and customer technical specification.
| Element | Typical Range / Limit | Function in GH4033 Alloy |
|---|---|---|
| Ni | Balance | Base element providing high-temperature strength and alloy stability. |
| Cr | 19.0 – 22.0% | Improves oxidation resistance and high-temperature corrosion resistance. |
| Ti | 2.40 – 2.80% | Forms precipitation strengthening phase with aluminum. |
| Al | 0.60 – 1.00% | Supports γ’ precipitation strengthening and oxidation resistance. |
| C | 0.03 – 0.08% | Contributes to carbide formation and high-temperature strength control. |
| Fe | ≤ 4.0% | Controlled residual or alloying element depending on specification. |
| Si | ≤ 0.65% | Controlled to maintain alloy cleanliness and process stability. |
| Mn | ≤ 0.35% | Controlled minor element for metallurgical balance. |
| P / S | Low residual limits | Low impurity control helps improve hot workability and reliability. |
Mechanical Properties
GH4033 Nickel Alloy Flanges are selected for applications where high-temperature strength and oxidation resistance are required. Mechanical properties depend on forging condition, heat treatment, flange thickness, machining process and final customer specification. The following values are general engineering references and should be verified by the actual MTC for each heat number.
| Property | Typical Reference Value | Engineering Meaning |
|---|---|---|
| Tensile Strength | Approx. ≥ 960 MPa | Provides strength for high-temperature flange components and structural parts. |
| Yield Strength | Approx. ≥ 670 MPa | Important for pressure-bearing flange design and bolted joint stability. |
| Elongation | Approx. ≥ 15% | Indicates ductility and forming reliability after proper processing. |
| Hardness | Project-dependent | Can be controlled according to heat treatment and machining requirements. |
| Service Temperature | Commonly used below about 700°C | Suitable for many high-temperature load-bearing alloy components. |
| Oxidation Resistance | Good below about 900°C | Useful for hot gas, turbine-related and high-temperature equipment environments. |
Common Size Table
GH4033 flanges are normally produced by forging and precision machining according to flange standard or customer drawing. For non-standard flange designs, buyers should provide drawings with OD, ID, PCD, bolt hole size, thickness, raised face height, groove details and tolerance requirements.
| Flange Type | Common Size Range | Pressure Class | Typical Use |
|---|---|---|---|
| Welding Neck Flange | NPS 1/2″ – 24″ | Class 150 – 2500 | High-temperature piping and critical welded joints. |
| Slip-On Flange | NPS 1/2″ – 24″ | Class 150 – 600 | General alloy piping and moderate service connections. |
| Blind Flange | NPS 1/2″ – 24″ | Class 150 – 2500 | End closure for high-temperature alloy equipment. |
| Socket Weld Flange | NPS 1/2″ – 4″ | Class 150 – 1500 | Small-bore high-temperature alloy pipe systems. |
| Custom Machined Flange | According to drawing | According to design | Aerospace, turbine, marine and chemical equipment parts. |
Different Specifications Comparison
Different flange types are selected according to pressure, temperature, connection method and maintenance requirements. For GH4033 Nickel Alloy Flanges, the most suitable specification depends on whether the flange is used for a piping connection, turbine-related component, equipment cover, nozzle connection or custom high-temperature assembly.
| Specification | Advantages | Limitations | Recommended Buyer Use |
|---|---|---|---|
| ASME B16.5 Flange | Widely recognized international flange dimensions. | Material must be separately confirmed for GH4033. | Export piping systems and international engineering projects. |
| EN 1092-1 Flange | Common for European PN-rated flange systems. | Custom material mapping may be required. | European equipment, machinery and industrial piping. |
| DIN Flange | Useful for German and legacy European equipment. | Drawing confirmation is recommended. | Replacement parts and customized high-temperature equipment. |
| JIS Flange | Suitable for Japanese standard piping systems. | Pressure class and dimensions differ from ASME. | Asian machinery and plant maintenance projects. |
| Drawing-Based Flange | Best fit for special equipment and aerospace components. | Requires full drawing and tolerance review. | Turbine, aerospace, marine hardware and chemical equipment. |
Equivalent Standards and International Names
GH4033 is mainly used in Chinese high-temperature alloy systems. In international trade, buyers may also see GH33 or Russian-related alloy names in historical references. Equivalent names should be used carefully because chemical composition, heat treatment and mechanical property requirements may not be completely identical across different standards.
| System | Name / Standard | Notes for Buyers |
|---|---|---|
| Chinese Grade | GH4033 / GH33 | Primary grade name for this nickel-chromium high-temperature alloy. |
| Chinese Material Reference | GB/T 14992 | Often used for superalloy classification and chemical composition reference. |
| Russian Reference | ЭИ437Б / ХН77ТЮР | Historical or international reference; confirm chemistry before substitution. |
| Flange Dimension Standard | ASME B16.5 / ASME B16.47 | Used for flange dimensions, pressure class and facing design. |
| European Flange Standard | EN 1092-1 | Used for PN-rated flange designs; material grade should be separately confirmed. |
| Inspection Document | EN 10204 3.1 | Recommended certificate format for export material traceability. |
Production Process Flow
GH4033 Nickel Alloy Flanges require careful production control because high-temperature nickel alloys are sensitive to forging temperature, grain structure, heat treatment and machining accuracy. Strict process control helps improve flange strength, dimensional stability and final service reliability.
| Step | Process | Quality Control Focus |
|---|---|---|
| 1 | Raw material selection | Verify GH4033 grade, heat number and MTC before production. |
| 2 | Cutting and billet preparation | Control billet size, traceability and surface defects. |
| 3 | Forging or ring rolling | Control forging temperature, deformation ratio and grain structure. |
| 4 | Heat treatment | Ensure proper precipitation strengthening and mechanical properties. |
| 5 | Rough machining | Reserve machining allowance and check flange geometry. |
| 6 | Finish machining | Control OD, ID, bolt holes, facing, thickness and surface roughness. |
| 7 | Inspection and marking | PMI, dimensional inspection, visual inspection and heat number marking. |
| 8 | Packing and shipment | Protect machined faces, flange sealing surfaces and documents. |
Product Inspection
Inspection is critical for GH4033 Nickel Alloy Flanges because they are used in high-temperature and high-value equipment. SAKY Alloy can support material verification, dimensional inspection and documentation review before shipment. Third-party inspection can also be arranged according to customer requirements.
| Inspection Item | Purpose | Available Document |
|---|---|---|
| Chemical Analysis | Verify GH4033 nickel alloy composition. | MTC / chemical report |
| Mechanical Test | Confirm tensile strength, yield strength and elongation. | EN 10204 3.1 MTC |
| PMI Testing | Support anti-fake material control and alloy identity verification. | PMI report |
| Dimensional Inspection | Check OD, ID, PCD, bolt hole, thickness and facing dimensions. | Dimensional inspection report |
| Visual Inspection | Check machining marks, dents, cracks, sealing face quality and surface condition. | QC report / pre-shipment photos |
| UT Testing | Detect internal discontinuities in forged blanks or heavy flanges. | UT report if required |
| Third-Party Inspection | Independent verification before shipment. | SGS, BV, TÜV or customer-nominated report |
Product Packaging
GH4033 Nickel Alloy Flanges are high-value alloy products, so proper export packaging is important. Machined flange faces must be protected from scratches, impact, moisture and contamination during transportation. SAKY Alloy can provide seaworthy packaging suitable for air, sea and courier shipment.
| Packaging Item | Details |
|---|---|
| Surface Protection | Plastic film, foam sheet, anti-scratch wrapping and protection for sealing faces. |
| Small Flange Packing | Carton plus wooden case or separated packing according to quantity. |
| Heavy Flange Packing | Strong wooden case, wooden pallet or steel frame if required. |
| Marking | Grade, size, heat number, quantity, PO number and shipping marks. |
| Documents | Packing list, invoice, MTC, inspection report and certificate documents. |
| Export Support | Seaworthy export packing, air shipment packing and customized logistics support. |
Applications & Machinability
GH4033 Nickel Alloy Flanges are used when standard stainless steel flanges cannot meet high-temperature strength or oxidation resistance requirements. The alloy is suitable for high-temperature bearing components, custom equipment connections and high-value industrial assemblies requiring reliable nickel alloy performance.
Application Industries
| Industry | Typical Use | Material Value |
|---|---|---|
| Medical Instruments | Custom high-temperature or sterilization-related metal components where specified by drawing. | Stable alloy performance and precision machining capability. |
| Aerospace | Turbine-related components, high-temperature assemblies and custom flange parts. | High-temperature strength, oxidation resistance and traceability. |
| Marine Hardware | High-performance hardware, exhaust-related connections and special alloy parts. | Nickel alloy strength and oxidation resistance under harsh service conditions. |
| Chemical Processing | High-temperature equipment nozzles, flange connections and custom alloy components. | Heat resistance, strength and reliable material documentation. |
| Power and Energy | High-temperature fastening, flanged joints and equipment replacement parts. | Stable performance in elevated-temperature operating conditions. |
Machinability, Welding and Heat Treatment
GH4033 is not as easy to machine as free-cutting stainless steel such as 303. It is a high-temperature nickel alloy with work-hardening tendency, so sharp tools, rigid clamping, controlled cutting speed and suitable coolant are recommended. For precision flange machining, machining allowance and final inspection should be confirmed before production.
Welding of GH4033 should be evaluated according to the actual application, filler metal, heat treatment condition and service temperature. For critical aerospace or pressure-related components, welding procedure qualification and post-weld inspection may be required. GH4033 is a precipitation-hardening alloy, so heat treatment control is important for achieving the required mechanical performance and dimensional stability.
Why Choose SAKY STEEL?
SAKY STEEL supplies stainless steel, nickel alloy, high-temperature alloy, titanium alloy and special alloy products for global industrial customers. For GH4033 Nickel Alloy Flanges, we provide technical communication, drawing review, material selection support, customized machining and export documentation support.
| Advantage | Details |
|---|---|
| High-Temperature Alloy Supply | GH4033, GH4169, GH3030, GH3039, Inconel, Incoloy, Hastelloy and other nickel alloy materials. |
| Custom Flange Manufacturing | Welding neck, slip-on, blind, socket weld, threaded and drawing-based special flanges. |
| MTC and EN 10204 3.1 | We can provide MTC (Mill Test Certificate / 质保书) and EN 10204 3.1 certificate for traceability and project approval. |
| Inspection Support | PMI testing, UT testing, dimensional inspection, visual inspection and third-party inspection support. |
| Anti-Fake Material Control | Heat number control, certificate matching, marking control and pre-shipment inspection. |
| Export Capability | Seaworthy packing, international logistics support and documentation for export shipment. |
FAQ
What are GH4033 Nickel Alloy Flanges used for?
GH4033 Nickel Alloy Flanges are used for high-temperature equipment, aerospace components, turbine-related parts, chemical processing systems, marine hardware and custom alloy assemblies requiring strength and oxidation resistance at elevated temperature.
Is GH4033 the same as Inconel 625?
No. GH4033 is a Ni-Cr precipitation-hardening high-temperature alloy strengthened by aluminum and titanium, while Inconel 625 is a nickel-chromium-molybdenum-niobium alloy known for corrosion resistance. They should not be substituted without engineering approval.
Can GH4033 flanges be manufactured according to ASME B16.5?
Yes. GH4033 flanges can be machined according to ASME B16.5 dimensions when the customer requires ASME flange geometry. The material grade, chemical composition, heat treatment and inspection documents should be specified separately.
Can you provide MTC and EN 10204 3.1 certificate?
Yes. SAKY STEEL can provide MTC (Mill Test Certificate / 质保书) and EN 10204 3.1 certificate for GH4033 Nickel Alloy Flanges. The certificate can include grade, heat number, chemical composition, mechanical properties, size and delivery condition.
Is GH4033 easy to machine?
GH4033 is machinable, but it is not a free-cutting alloy. Compared with 303 stainless steel, GH4033 requires more careful machining control because nickel-based high-temperature alloys may work harden. Rigid tooling, suitable cutting speed and coolant are recommended.
What information should I provide for quotation?
Please provide grade, flange type, standard, size, pressure class, facing type, quantity, drawing if available, heat treatment requirement, inspection requirement, certificate requirement, packing method and delivery destination.
Can GH4033 flanges be customized?
Yes. GH4033 flanges can be customized according to drawings, including special OD, ID, thickness, bolt holes, groove, sealing face, raised face, ring-type joint design and precision machining requirements.
Request a Quotation
Contact SAKY STEEL for GH4033 Nickel Alloy Flanges, GH4033 forged flanges, GH4033 blind flanges, GH4033 welding neck flanges and custom high-temperature nickel alloy components. Please send your drawing, standard, size, pressure class, quantity, certificate requirement and delivery destination for a professional quotation.
