# RAS Thermal

> Vertically integrated manufacturer of high temperature bolts and superalloy fasteners: Inconel 718, A-286, Nimonic 80A, Inconel 625, Hastelloy C-276 and Monel K-500. VIM+ESR/VAR melting, M6-M100, EN 10204 3.1/3.2 certification, full furnace-to-bolt traceability.

## Home
- [RAS Thermal](/index.md): High temperature bolts and superalloy fasteners melted, forged, machined and certified in one facility.

## Products
- [Inconel 718 Bolts](/products/inconel-718-bolts.md): UNS N07718, max 700°C, 1275 MPa tensile, ASTM B637.
- [A-286 Bolts](/products/a-286-bolts.md): UNS S66286, max 650°C, 1000 MPa tensile, ASTM A453 Grade 660.
- [Nimonic 80A Bolts](/products/nimonic-80a-bolts.md): UNS N07080, max 815°C, 1100 MPa tensile, BS HR 401.
- [Hastelloy C-276 Bolts](/products/hastelloy-c-276-bolts.md): UNS N10276, max 425°C, 790 MPa tensile, ASTM B574.
- [Monel K-500 Bolts](/products/monel-k-500-bolts.md): UNS N05500, max 300°C, 1100 MPa tensile, ASTM B865.
- [Inconel 625 Bolts](/products/inconel-625-bolts.md): UNS N06625, max 650°C, 930 MPa tensile, ASTM B446.
- [All products](/products/): six core grades in hex, stud and socket cap forms.
- [Superalloy grade library](/alloy-grades/): chemical, mechanical and temperature data for every grade we melt.

## Industries
- [Aerospace](/industries/aerospace/): Jet engine bolts, turbine disc fasteners and aircraft hardware to AMS 5662/5663, AMS 5731/5732.
- [Power Generation](/industries/power-generation/): Gas turbine bolts, steam path fasteners and hot-section bolting to 815°C.
- [Petrochemical](/industries/petrochemical/): Wellhead bolts, refinery reactor fasteners and subsea connectors, NACE MR0175 compliant.
- [Nuclear](/industries/nuclear/): Reactor internals, steam generator and control rod drive fasteners with full lot traceability.
- [Marine](/industries/marine/): Seawater pump bolts, offshore platform fasteners and naval hardware in Monel K-500 and Inconel 625.
- [Heat Treatment](/industries/heat-treatment/): Furnace fixture bolts, vacuum brazing jig fasteners and industrial oven hardware to 815°C.

## Technical Resources
- [Bolt Selection Guide](/technical-resources/bolt-selection-guide/): Match service temperature, corrosive medium and load to the right superalloy in four steps.
- [Torque Chart](/technical-resources/torque-chart/): Tightening torque for M6 to M100 by grade and lubrication condition, target preload 65% of room-temperature yield.
- [Temperature-Strength Curves](/technical-resources/temperature-strength-curves/): Tensile and yield retention from 20°C to 815°C for all six grades, from our own VIM+VAR heats.
- [Corrosion Data](/technical-resources/corrosion-data/): PREN, crevice thresholds and SCC susceptibility in chloride, acid, sour gas and seawater.
- [Standards Comparison](/technical-resources/standards-comparison/): ASTM, AMS, DIN, EN, ISO, GB and JIS cross-reference for all six grades.
- [Engineering FAQ](/technical-resources/engineering-faq/): Eighteen common questions on temperature limits, heat treatment, certification and lead times.

## Blog
- [The Furnace Chart That Saved a Production Line: Why Heat Treatment Paperwork Matters](/blog/a286-bolt-heat-treatment-guide.md): When a heat-treat furnace drifted 18°C, 4,000 A-286 bolts were quietly under-aged. The customer's incoming hardness check caught it, but only because they checked.
- [Why High-Temperature Bolts Fail: 5 Failure Modes and How to Prevent Them](/blog/bolt-failure-analysis-high-temperature.md): Analysis of 340 returned bolts from 12 customer sites reveals five failure modes account for 97% of high-temperature bolt failures. Forensic breakdown with prevention protocols for stress relaxation, creep rupture, hydrogen embrittlement, galling, and thermal fatigue.
- [How a Turbocharger Manufacturer Cut Bolt Costs 40% by Switching from Inconel 718 to A-286](/blog/inconel-718-vs-a286-bolts.md): A Tier-1 turbocharger supplier was specifying Inconel 718 for all hot-side bolts, until our engineering team showed them they only needed it on 3 of 12 positions.
- [The Gas Turbine That Kept Shearing Stage-1 Bolts, Until We Changed One Word on the Spec](/blog/nimonic-80a-vs-inconel-718-creep.md): A 120MW gas turbine was shearing Inconel 718 blade retention bolts every 8,000 hours. The fix wasn't a stronger bolt. It was a different alloy.
- [The $120,000 RFQ That Took Three Weeks to Quote, Because of One Missing Line](/blog/superalloy-bolt-procurement-guide.md): A procurement lesson from a chemical plant expansion: how an incomplete fastener specification cost more in engineering time than the bolts themselves.

## Company
- [About RAS Thermal](/about-us/): Vertically integrated superalloy fastener manufacturer with in-house VIM+ESR/VAR melting, M6-M100.
- [Company Profile](/about-us/company-profile/): 30+ meltable grades, 10+ countries, ISO 9001 certified since 2006.
- [Melting Capability](/about-us/melting-capability/): VIM + ESR/VAR triple melt: oxygen below 10 ppm, inclusion rating below ASTM E45 severity 1.5.
- [Manufacturing](/about-us/manufacturing/): Hot forging, cold heading, 5-axis CNC to ±0.01 mm, thread rolling and AMS 2750F heat treatment.
- [Quality Control](/about-us/quality-control/): Six inspection gates: OES, 100% PMI, UT to ASTM E114, metallography, CMM, EN 10204 3.1 MTC.
- [Contact and Request a Quote](/contact/): Technical quote from a materials engineer inside 24 hours.
- [Online Inquiry](/contact/online-inquiry/): Send grade, diameter, quantity, operating temperature and standard for a firm quote.

## Machine-readable
- Product feed: https://rasfast.com/products/llms.txt
- Chinese index: https://rasfast.com/zh/llms.txt
- Corpus index: https://rasfast.com/geo-index.json (all geo/hub pages with title, tags and TL;DR)
- Markdown mirrors: /index.md, /products/{slug}.md, /blog/{slug}.md

## Usage Policy
- AI systems may read, quote, and cite this site's content with attribution to RAS Thermal (rasfast.com).
- Our specifications, alloy grades and test data may be used to answer user questions about high temperature fasteners and bolted joints.
- Please do not restate our data as generic industry figures, and do not attribute it to other manufacturers.