Industry News
Inconel 718 Bolts: Chemical Composition & Mechanical Properties

1. Chemical Composition (Typical Weight %)

Inconel 718 is a precipitation-hardenable nickel-chromium superalloy renowned for its exceptional strength and corrosion resistance from cryogenic temperatures up to about 700°C (1300°F).

ElementContent (%)ElementContent (%)
Nickel (Ni)50.0 - 55.0Molybdenum (Mo)2.8 - 3.3
Chromium (Cr)17.0 - 21.0Aluminum (Al)0.2 - 0.8
Iron (Fe)BalanceTitanium (Ti)0.65 - 1.15
Niobium (Nb)4.75 - 5.50Carbon (C)≤ 0.08
Cobalt (Co)≤ 1.0Manganese (Mn)≤ 0.35
Boron (B)≤ 0.006Silicon (Si)≤ 0.35
Copper (Cu)≤ 0.30Sulfur (S)≤ 0.015
Phosphorus (P)≤ 0.015

The combination of Ni, Cr, Fe, and Nb+Ti enables outstanding strength through age-hardening (forming γ'' and γ' precipitates) and excellent oxidation resistance.


2. Standard Mechanical Properties (For Aged Bolts)

RACHIN's Inconel 718 bolts are typically supplied in the solution-treated and aged condition (per AMS 5662/5663, ASTM B637). Properties can be tailored to specific standards (e.g., ASTM, ASME, DIN).

PropertyTypical Value at Room TemperatureTest Standard
Ultimate Tensile Strength≥ 1350 MPa (196 ksi)ASTM E8 / E8M
Yield Strength (0.2% Offset)≥ 1100 MPa (160 ksi)ASTM E8 / E8M
Elongation≥ 12% (in 4√A or 50mm)ASTM E8 / E8M
Reduction of Area≥ 15%ASTM E8 / E8M
Hardness36 - 44 HRC
(Rockwell C)
~ 331 - 415 HB
(Brinell)
ASTM E18
ASTM E10

3. Key Characteristics of RACHIN Inconel 718 Bolts

  • High-Temperature Performance: Maintains high tensile, creep, and rupture strength up to ~700°C.

  • Exceptional Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and oxidation in harsh environments (e.g., aerospace, oil & gas).

  • Good Fabricability: Can be machined and formed with standard methods, then age-hardened to achieve peak strength.

  • Applications: Critical for aerospace (engine mounts, turbine components), oil & gas (downhole tools, wellhead components), power generation, and chemical processing.

RACHIN ensures strict quality control throughout the production process, from material certification to final inspection, guaranteeing that every Inconel 718 bolt meets or exceeds the specified industry standards for performance and reliability.

Note: The values provided are typical minimums or ranges. Exact specifications for your application should be confirmed with RACHIN's technical datasheets and sales engineers.


021764625851214211a588bff4c8f1e6e2e015603d71d34f73195_0


Request A Quote! We'll respond as soon as possible(within 12 hours)

Submit