Technical requirements of the ASTM B834 standard
This standard regulates the production of pipe flanges, connecting fittings, valves, and components manufactured via powder metallurgy using high-pressure pressing technology. The range of materials includes corrosion-resistant nickel-based alloys: UNS N08367 (iron-nickel-chromium-molybdenum), UNS N06625 (nickel-chromium-molybdenum-niobium), UNS N06600 and N06690 (nickel-chromium-iron), as well as the precipitation-hardening alloy UNS N07718 (nickel-chromium-iron-niobium-molybdenum). The technological potential of EV Group China enables the supply of products that operate in aggressive environments and under extreme temperature conditions.
The classification of UNS N06625 alloy products is based on heat treatment modes, which determine operational properties:
- Class 1 (annealed condition): optimal for stable operation at temperatures not exceeding 593 °C (1100 °F).
- Class 2 (solution annealed): designed for high-temperature loads above 593 °C (1100 °F), where heat resistance and creep resistance indicators are critical.
Specific supply conditions for other alloy grades:
- UNS N08367: after full solution annealing.
- UNS N06600 and UNS N06690: in the annealed condition to ensure required ductility.
- UNS N07718: after combined treatment (solution annealing followed by precipitation hardening).
The engineering department of EV Group China reminds that the standard values in the specification are in the inch-pound system. Metric equivalents in parentheses are for reference only and are not normative for design purposes. When conducting tests described in sections 7.3 and 13, it is necessary to strictly observe industrial safety protocols, as this standard does not cover all aspects of occupational health and safety when working with powder materials and high-temperature equipment.