Incoloy 800HT Washers
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Sunrise Machination LLP is a leading manufacturer and global supplier of premium Incoloy® 800HT (UNS N08811) Washers, engineered for extreme high-temperature, oxidation-resistant, and thermal cycling applications. As an ISO 9001:2015 certified manufacturer, we produce a comprehensive range of Incoloy washers, including Plain Washers, Spring Washers, Belleville Washers, Wave Washers, Split Lock Washers, Square Washers, and custom-engineered washer solutions. Manufactured from high-quality Incoloy 800HT sourced from globally recognized mills, our washers deliver exceptional creep resistance, oxidation resistance up to 900°C, excellent thermal stability, and reliable load distribution in demanding industrial environments. With advanced stamping, forming, precision heat treatment, and comprehensive in-house testing capabilities, we supply high-performance Incoloy washers to customers across Europe, the USA, Japan, GCC countries, and Southeast Asia for applications in power generation, petrochemical processing, aerospace, chemical processing, oil & gas, marine, pharmaceutical, and other critical industries. Every Incoloy Washer manufactured by Sunrise Machination LLP undergoes stringent quality control and material verification to ensure long-term performance in extreme service conditions. Our manufacturing process includes ICP/OES chemical composition testing, precision dimensional inspection, high-temperature tensile testing, creep rupture testing, oxidation resistance evaluation, hardness verification, spring force validation (where applicable), and complete batch traceability from raw material to finished product. Each shipment is supplied with a Certificate of Conformance (CoC), premium mill certificates, and detailed inspection reports, ensuring full compliance with ASTM B409, ASTM E21, ASTM E139, ASTM B912, DIN 125, ISO 7089, and relevant international Standards. With Decades of Engineering Experience, premium raw materials, and a commitment to zero-defect manufacturing, Sunrise Machination LLP delivers Incoloy Washers that provide dependable fastening performance, superior oxidation resistance, and extended service life in the world's most demanding high-temperature industrial applications.
Incoloy® 800HT (N08811) Washers
Sunmach is an ISO 9001:2015 certified manufacturer and global supplier of standard Incoloy® 800HT Washers, Plain Washers, Spring Washers, & custom or Special(Square Washers) Incoloy® 800HT Washers. Apart from Incoloy® 800HT, We also manufacture Washers from these other special materials such as Duplex 2507, Hastelloy® G-30, Inconel® 625, Stainless Steel 300 Series, Nickel 200, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7 & Monel® 400, Monel® K-500, Special Stainless 904L, Nitronic® 60, 254 SMO, A4-80 Stainless Steel to name few.
To manufacture & timely deliver a precision Standard Incoloy® 800HT Nuts or Custom Incoloy® 800HT Washers, apart from adequate inventory, we have advanced machinery, experienced engineering team, R&D; team, Prototyping team, Heat Treatment facility & all required Testing along with the efficient logistic team. All Raw Materials sourced from the most reputable and renowned manufacturers in the world.
Sunmach bolts meet applicable DIN, ISO, ANSI and IS.
Sunmach serves a diverse range of markets including Chemical Processing, Semiconductor, Power Generation, Aerospace, Oil & Gas, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control and Water Treatment.
Frequently Asked Questions
Common questions about Sunmach Incoloy Washers
They are used for load distribution and maintaining joint tension in extreme high-temperature environments where Standard Stainless Steel Washers would soften or deform. Typical applications include gas turbines in power generation, high-temperature steam systems, petrochemical furnace piping, chemical reactors, and commercial heat-treatment equipment.
Standard Stainless Steel (such as 316L) loses its mechanical strength and load-bearing capacity rapidly once operating temperatures exceed 600°C. Incoloy 800HT washers are specifically engineered to remain structurally stable and resist oxidation at continuous operating temperatures up to 900°C, preventing joint loosening over long-term thermal cycles.
Incoloy 800HT contains controlled additions of titanium and aluminum. When the alloy undergoes specialized heat treatment, these elements form microscopic precipitates within the metal that lock the grain structure in place. This prevents the metal grains from shifting or stretching (creeping) when subjected to high temperatures and heavy clamping forces.
A nylon-insert locking fastener relies on a polymer collar that will melt or lose its elasticity at temperatures above 100°C to 150°C. For any application operating above this threshold, or in high-temperature steam lines, all-metal spring washers or flat plain washers matching a high-temperature alloy like Inconel or Incoloy are mandatory to prevent joint loosening.
Every premium washer batch is shipped with complete material traceability. This includes EN 10204 3.1 Mill Test Certificates verifying raw material chemistry, physical tensile test results at room and elevated temperatures, hardness measurements, and dimensional inspection logs proving complete flat surface uniformity.