Astm A453 Gr.660 Heavy Hex Nut 1.3/4"", 70 mm

ASTM A453 Grade 660 Nuts and Bolts – Chemical & Mechanical Properties, Applications, and Description Product Description: ASTM A453 Grade 660 nuts and bolts are high-temperature, high-strength fasteners manufactured from austenitic stainless steel. Primarily used in pressure vessels, turbine engines, and heat exchangers, these fasteners are designed for high stress and elevated temperature environments up to 1000°F (538°C). They are categorized into four classes (A, B, C, and D) based on tensile strength requirements after solution annealing and aging treatment. Chemical Composition (%): Element Content (%) Chromium (Cr) 24.0 – 27.0 Nickel (Ni) 13.5 – 16.0 Molybdenum (Mo) 1.0 – 1.5 Titanium (Ti) 0.10 – 0.50 Carbon (C) £ 0.10 Manganese (Mn) £ 2.0 Silicon (Si) £ 1.0 Phosphorus (P) £ 0.04 Sulfur (S) £ 0.03 Iron (Fe) Balance Mechanical Properties: Class Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HRB) Class A 760 min 450 min 30 min £ 100 Class B 850 min 585 min 25 min £ 100 Class C 960 min 690 min 20 min £ 100 Class D 1040 min 830 min 15 min £ 100 Applications: - Steam and Gas Turbines – Withstand extreme heat and pressure - Nuclear Power Plants – Approved for high-radiation environments - Heat Exchangers – Reliable in thermal cycles - Aerospace Engines – High strength-to-weight ratio - Petrochemical Refineries – Excellent oxidation resistance - Pressure Vessels – Long-term mechanical reliability - Flanges and Piping Assemblies – Stable at elevated temperatures Focus Keywords: ASTM A453 Grade 660 fasteners, Grade 660 stainless steel bolts, High temperature nuts and bolts, A453 Class A B C D nuts, Turbine engine fasteners, High tensile bolts India, Heat resistant fasteners SEO Meta Description: Buy ASTM A453 Grade 660 stainless steel nuts and bolts for high-temperature and high-stress applications in turbines and reactors. Available in all classes A–D. Hashtags: #ASTMA453 #Grade660 #HighTempFasteners #StainlessSteelBolts #TurbineFasteners #NuclearFasteners #HeatResistantBolts #EngineeringMaterials #IndustrialFasteners #AerospaceBolts #AanurajFasteners #MadeInIndia