Oil & Gas CNC Machining Australia
High-Spec Oil & Gas Components.
Corrosion Resistant. Pressure Rated. Traceable.
CNC machined oil and gas components sourced through Rapid Manufacturing's audited supplier network. Duplex stainless, Inconel, titanium and more. NACE-aware suppliers. Quotes in 2 business days.
Get Your Oil & Gas Quote →Oil & Gas Machining Challenges
Oil and gas components operate in some of the harshest environments on earth — high pressure, high temperature, corrosive fluids, hydrogen sulphide, and in subsea applications, constant seawater exposure at extreme depth. The materials required to survive these conditions are often the hardest to machine: duplex and super duplex stainless steels, nickel superalloys, and titanium.
Add to that the documentation requirements — material traceability from mill to finished component, NACE compliance records, pressure test certificates, and often third-party inspection — and it's clear why oil and gas machining requires specialist suppliers who understand the industry's demands.
Rapid Manufacturing sources oil and gas components through a vetted supplier network with experience in these materials and documentation requirements. Whether you need a prototype valve body in duplex 2205 or a production batch of Inconel 625 subsea connector components, we can match your project to the right facility.
Oil & Gas Materials
Duplex 2205
Valve bodies, manifolds, fittings, pipe flanges
PREN 35+ — suitable for moderate to high chloride environments
Super Duplex 2507
Subsea components, high-chloride seawater service
PREN 42+ — maximum pitting resistance for severe offshore environments
Inconel 625
Subsea connectors, flexible risers, sour service
NACE MR0175 compliant — excellent resistance to chloride and H2S
Inconel 718
High-temperature wellhead components, downhole tools
Retains strength to 650°C — precipitation hardened for high strength
Titanium Grade 2
Seawater service, lightweight subsea components
Immune to seawater corrosion — excellent for splash zone and subsea
316L Stainless Steel
Topside fittings, non-sour service components
Cost-effective for non-sour, moderate corrosion environments
17-4PH Stainless
High-strength valve stems, fittings, structural parts
H900 condition meets NACE MR0175 for sour service
Carbon/Alloy Steel (4140)
Structural components, non-corrosive service with coating
Cost-effective where cathodic protection or coating is applied
Oil & Gas CNC Machining FAQ
What materials are used for oil and gas CNC machined components?
Oil and gas applications require materials that resist corrosion, high pressure, high temperature, and often hydrogen sulphide (H2S) environments. Common materials include: 316L stainless steel (general corrosion resistance, non-sour service), duplex stainless 2205 and 2507 (superior strength and pitting resistance vs austenitic grades, suitable for higher chloride environments), Inconel 625 and 718 (high-temperature and extreme corrosion environments), titanium Grade 2 and Ti-6Al-4V (lightweight, excellent corrosion resistance, seawater service), 17-4PH and 15-5PH stainless (high-strength fittings and valve components), and carbon steel/alloy steel with appropriate coating for non-corrosive applications.
What is NACE and why does it matter for oil and gas machining?
NACE (now AMPP — Association for Materials Protection and Performance) publishes standards for materials used in hydrogen sulphide (sour service) environments, primarily NACE MR0175/ISO 15156. This standard specifies hardness limits and material requirements to prevent sulphide stress cracking (SSC) — a form of hydrogen embrittlement that can cause catastrophic failure in sour oil and gas service. For components going into sour service, material selection and heat treatment must comply with NACE MR0175. Specify sour vs non-sour service in your quote request so appropriate materials and process controls can be applied.
What types of components do you machine for oil and gas?
Common oil and gas CNC machined components include: valve bodies and bonnets, flanges and pipe fittings, manifold blocks, downhole tool components, choke bodies, actuator housings, subsea connector bodies, wellhead components, pump housings and impellers, heat exchanger tube sheets, and pressure vessel nozzles. Both topside and subsea (deepwater) applications require different material and documentation approaches.
What tolerances are typical for oil and gas machined components?
Tolerances vary by component function. Sealing surfaces (valve seats, flange faces) typically require Ra 0.8–1.6μm surface finish and flatness within 0.02mm. Bore dimensions for valve stems and plug clearances may require ±0.01–0.025mm. Thread forms must comply with relevant API standards (API 6A, 11B, etc.). Pressure-containing bores require careful dimensional control to ensure pressure rating integrity. Specify the applicable standard (API 6A, ASME B16.34, etc.) in your quote request.
Do you machine to API standards?
Our supplier network can machine to API standards including API 6A (wellhead and Christmas tree equipment), API 11B (sucker rod pumping units), and API 6D (pipeline valves). API-compliant machining requires specific dimensional requirements, material traceability, heat treatment records, and often third-party inspection. Specify the applicable API standard in your quote request and we will confirm supplier capability.
Can you machine duplex and super duplex stainless steel?
Yes. Duplex 2205 and super duplex 2507 are widely used in oil and gas applications for their superior pitting resistance (higher PREN value) compared to 316L, and higher strength allowing thinner wall sections. These alloys are more difficult to machine than austenitic grades — they work-harden quickly and generate high cutting forces. Our supplier network includes manufacturers with experience in duplex and super duplex machining using appropriate tooling and cutting parameters.
How do I get a quote for oil and gas CNC machining?
Upload your drawing or 3D CAD file at rapidmanufacturing.com.au/quote. Include: material specification and grade, service environment (sour/non-sour, temperature, pressure class), applicable standard (API, ASME, NACE), quantity, surface finish requirements, and any special processes or third-party inspection requirements. Our team reviews oil and gas quote requests manually and responds within 2 business days.
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