Themba Nickel Alloys in Cape Town, Cape Town, is a prominent producer and exporter of Incoloy 800, 800H, and 800HT bolts. Developed to exhibit superior mechanical strength and resistance to carburization and oxidation in hostile high-temperature and corrosive conditions, Themba Nickel Alloys produces the high-performance bolts to exacting international standards. Available in Incoloy bolts that provide reliable fastening solutions in mission-critical applications, Themba Nickel Alloys supplies its high-quality bolts globally. Industries of petrochemical, power generation, oil and gas, and heat treatment depend on these bolts due to their strength, accuracy, and capacity to withstand extreme thermal and mechanical loads without losing structural integrity.
Incoloy 800, 800H, and 800HT bolts consist of a nickel-iron-chromium alloy that comes with variations of controlled carbon, aluminum, and titanium content. Incoloy 800 offers good resistance to oxidation and moderate strength, whereas 800H and 800HT provide better creep and stress rupture properties with higher carbon levels and specific heat treatments. These bolts exhibit stability up to 1100°C and are resistant to intergranular corrosion, pitting, and stress-corrosion cracking. Their mechanical properties render them suitable for usage at high temperatures, where strength, durability, and corrosion resistance are crucial for long-term service.
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Alloy 800/800H/800HT Bolt Specifications |
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| Specifications | : | ASTM B 408 ASME SB 408 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts. |
| Grade | C | Mn | Si | Fe | S | Cr | Al-Ti | Ni | |
| 800 | min. | – | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| 800H | min. | 0.05 | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| 800HT | min. | 0.06 | – | – | 39.5 | – | 19.0 | 0.85/0.25 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 1.20/0.60 | 35.0 | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 800-H-HT | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa –205 | 30 | – | – |
At Themban Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Incoloy 800/800H/800HT Bolts in Cape Town , South Africa, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Cape Town, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Incoloy 800, 800H, and 800HT bolts find extensive use in industrial processes that demand long-term operation under harsh conditions. In petrochemical and chemical processing, they find application in heat exchangers, furnaces, reactors, and piping systems operating with high heat and corrosive media. Power plants employ these bolts in boilers, steam generators, and superheaters because of their oxidation and thermal fatigue resistance. They are also used in oil refineries, nuclear plants, and other settings where both mechanical load and chemical exposure are extreme. These bolts provide reliable, long-term fastening for mission-critical systems.
