Inconel Socket Head Cap Screws
RAYCHIN SPECIALTY METALS FASTENERS: BOLTS, NUTS, SCREWS, WASHERS, STUDS, THREADED RODS, U-BOLT, J-BOLTS
STANDARD AND CUSTOMIZED, SMALL BATCH AND LARGE BATCH, IMPERIAL AND METRIC
A Ni-Cr alloy known for its high temperature stability & corrosion resistance
High temperature stability up to 2200°F (1204°C)
Good corrosion resistance at elevated temperatures
High strength material with excellent toughness at elevated temperatures
Inconel grades: 600, 601, 625, 686, 718, 725, X750
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RAYCHIN LIMITED
Inconel Socket Head Cap Screws · SHCS · Hex SocketInconel Socket Head Cap Screws: Nickel-Chromium Superalloy SHCS for Extreme Environments
RAYCHIN LIMITED is a leading manufacturer of Inconel Socket Head Cap Screws – precision high-strength fasteners featuring a cylindrical head and internal hex drive, designed for critical assemblies where high clamping force and reliability are paramount. These Inconel SHCS are available in a full range of diameters from #0 to 1½" (M1.6 to M36) and lengths up to 8" (200mm), with both inch (UNC/UNF) and metric coarse/fine threads. Manufactured from premium nickel‑chromium superalloys, they deliver exceptional high‑temperature strength up to 1095°C (2000°F), outstanding oxidation resistance, and immunity to chloride‑ion stress corrosion cracking. Our portfolio includes all standard and custom configurations manufactured to NAS, AN, MS, ANSI, ASTM, ASME, SAE, API, NACE, ISO, DIN and KS standards. Whether you require Inconel 718 socket head cap screws for aerospace turbine assemblies, Inconel 625 SHCS for marine chemical duty, or Inconel 600 socket head cap screws for heat treat fixtures, RAYCHIN delivers precision, quality, and full traceability. All mechanical properties are presented in MPa and ksi (kilopound per square inch).
Inconel Socket Head Cap Screws – Configurations & Standards
Head & Drive Specifications
Inconel socket head cap screws feature a precision-formed cylindrical head with a hexagon socket per ASME B18.3, DIN 912, and ISO 4762. Standard drives: hex (Allen) in sizes from .028" to 3/4" (metric 0.7mm to 19mm). Custom drive depths and tamper-resistant hex options available. Head dimensions conform to NAS1351 (inch) and NAS1352 (metric) aerospace standards.
Thread Specifications
Available in Inconel socket head cap screws with Unified Coarse (UNC), Unified Fine (UNF), UNJF‑3A (aerospace), and metric coarse threads (M1.6 to M36). Thread classes 2A, 3A, 6g. Precision rolled threads for superior fatigue life. Full thread and partial thread options available; lengths from 1/8" to 8" (3mm to 200mm). Custom thread lengths per drawing.
Aerospace & Military Standards
Our Inconel socket head cap screws meet NAS1351 (inch series), NAS1352 (metric series), and MS16995 (reduced head height). Full compliance with AMS 5662 (718), AMS 5666 (625), and AMS 5665 (600) for material and heat treatment. AN / MS cross-reference available for legacy designs.
Industrial & Petrochemical Grades
Inconel socket head cap screws for oil & gas, chemical processing, and power generation manufactured to ASTM B166 (600), ASTM B446 (625), ASTM B637 (718), API 20F, and NACE MR0175/ISO 15156. Supplied with EN 10204 3.1/3.2 certifications and full NDT (PMI, UT, MPI) upon request. Proven performance in sour gas (H₂S/CO₂) environments.
Surface Finish Options
Passivated per ASTM A967, silver plating per AMS 2410 (anti‑seize for high‑temperature), PTFE coating for anti‑galling, electropolished for clean room applications. Custom finishes available to meet specific torque and wear requirements.
Custom & Non‑Standard Socket Head Cap Screws
Need a special head diameter, extra‑long length, or proprietary drive? RAYCHIN engineers design and produce custom Inconel socket head cap screws to your exact specifications – any Inconel grade, any heat treat condition (annealed, aged), with full material traceability. Prototype to production volumes supported.
Critical Applications of Inconel Socket Head Cap Screws
Aerospace & Defense
Inconel 718 socket head cap screws used in turbine engine casings, compressor assemblies, landing gear components, and flight control actuators. Withstand 650°C operating temperatures and high vibration loads. Yield strength up to 1270 MPa ensures positive locking under extreme stress.
Oil & Gas / Sour Service
Inconel 625 SHCS and Inconel 718 socket head cap screws qualified per NACE MR0175 for wellhead equipment, valve bonnets, and subsea actuators. Resist sulfide stress cracking (SSC) and pitting in H₂S/CO₂ environments at elevated pressures and temperatures up to 200°C.
Power Generation
Inconel socket head cap screws in gas turbines, steam turbines, and nuclear reactors provide reliable joining of casings, flanges, and sensor mounts. Maintain clamping force after thousands of thermal cycles from -200°C to 700°C without relaxation.
Chemical Processing
Inconel 625 socket head cap screws resist boiling sulfuric acid, hydrochloric acid, and chlorinated solvents in reactor agitators, pump shafts, and valve assemblies. Immunity to chloride stress corrosion cracking ensures long-term reliability in aggressive media.
Marine & Offshore
Inconel socket head cap screws in seawater pump couplings, propeller shaft locking devices, and subsea control modules resist pitting and crevice corrosion in saltwater. Zero fastener failures reported after 3+ years continuous offshore operation.
Industrial Heat Treatment
Inconel 601 SHCS used in furnace fixtures, radiant tubes, and conveyor belts. Superior cyclic oxidation resistance up to 1150°C (2100°F) ensures long service life in air and carburizing atmospheres.
International Standards & Global Designations – Inconel Socket Head Cap Screws
RAYCHIN LIMITED manufactures Inconel socket head cap screws from material conforming to the most widely used national and international specifications. All material is traceable to the mill.
Chemical Composition (Weight %) – Inconel Alloys for Socket Head Cap Screws
Our Inconel socket head cap screws are produced from melts conforming to the following limits per ASTM/ASME/AMS.
Inconel 600 (UNS N06600 / 2.4816)
Inconel 625 (UNS N06625 / 2.4856)
Inconel 718 (UNS N07718 / 2.4668)
Metallurgical note: High nickel content (≥50%) provides exceptional resistance to chloride stress corrosion cracking. Chromium (14–23%) ensures oxidation resistance up to 1150°C. Molybdenum (in 625) and Nb+Ti (in 718) contribute to solid‑solution strengthening and precipitation hardening, giving these Inconel socket head cap screws their signature high‑temperature strength and corrosion resistance.
Complete Mechanical & Physical Properties – Inconel Socket Head Cap Screws (MPa / ksi)
Inconel socket head cap screws are supplied in solution annealed (600, 625, 601) or age‑hardened (718, X‑750) condition per specification. Data represent typical minimum or range values based on ASTM, AMS, and industry standards. ksi values (kilopound per square inch) are provided alongside MPa.
Mechanical Properties – Minimum Requirements (room temperature) for Socket Head Cap Screws
Physical Properties (typical) – Inconel Socket Head Cap Screws
High‑Temperature Performance of Inconel Socket Head Cap Screws
Inconel superalloys retain significant strength at elevated temperatures, making Inconel socket head cap screws ideal for gas turbines, furnace assemblies, and exhaust systems. Data below demonstrate the superiority of Inconel 718, 625, and 601 for high‑T applications. Strength values are shown in MPa and ksi.
Elevated Temperature Tensile – Inconel 718 (age hardened) for Socket Head Cap Screws
At 650°C, Inconel 718 retains about 80% of its room‑temperature tensile strength, outperforming many other alloys. Inconel 625 and 601 provide outstanding resistance to oxidation and carburization at even higher temperatures, making them excellent choices for high‑temperature socket head cap screws.
High‑Temperature Limits & Oxidation Resistance – Socket Head Cap Screws
Exceptional Corrosion Resistance of Inconel Socket Head Cap Screws
The high nickel and chromium content imparts resistance to a wide range of corrosive media: chlorides, acids, and alkalis. Inconel 625 and Inconel 718 socket head cap screws are particularly resistant to pitting and crevice corrosion in seawater and sour environments.
- Chloride stress corrosion cracking (SCC): All Inconel grades (600, 625, 718) exhibit high resistance due to Ni >40%; resistant to breakage caused by chlorine ions.
- Sulfuric & Hydrochloric acids: Inconel 625 shows exceptional performance in reducing acids (Mo addition).
- Sour service (H₂S): Inconel 625 & 718 qualified per NACE MR0175/ISO 15156 for oil & gas.
- Oxidation & carburization: Inconel 601 outperforms due to aluminum addition.
- Seawater: Inconel 625 resists pitting and crevice corrosion, used extensively in marine fasteners.
- High-purity water & alkalis: Inconel 600 offers excellent corrosion resistance.
Manufacturing Standards – Inconel Socket Head Cap Screws
All Inconel socket head cap screws are manufactured and tested to meet:
We offer surface finishes: passivation (ASTM A967), silver plating (AMS 2410 for anti‑seize), PTFE coating, electropolish, and anodized/MoS2 lubricated for aerospace. Full traceability and destructive/non‑destructive testing available (UT, MPI, PMI).
Why RAYCHIN LIMITED – The Inconel Socket Head Cap Screw Authority
Contact the Inconel socket head cap screw experts
Request a quotation for Inconel socket head cap screws, SHCS, hex socket cap screws – any standard (NAS, MS, ANSI, ASTM, ASME, API, NACE, ISO, DIN, KS) – any Inconel grade, any quantity. Global delivery. Mechanical data in MPa/ksi available for all products.
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