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20X100 8.8 allen bolt

• Application : ماشین آلات صنعتی
• Type : آلن
• Grade : 8.8
• Cover : سیاه - خود رنگ
• Standard : DIN912
• Size : 20X100
• Material : فولاد خشکه

The quenched and tempered steel Allen bolt grade 8.8 size M20 with a length of 100 mm has an approximate weight of 0.51 kg and is manufactured according to DIN 912 standards. Its alloy composition includes 0.25–0.55% carbon, 0.5–0.8% manganese, small amounts of silicon, and less than 0.035% sulfur and phosphorus. This chemical balance improves tensile strength, enhances hardenability, and reduces brittleness under cyclic or high-stress loading.

The heat treatment process for the M20x100 Allen bolt typically involves quenching in oil or water followed by tempering at controlled temperatures. This sequence produces a martensitic structure with a surface hardness of 22–34 HRC. The tempering stage increases toughness, minimizes the risk of brittle fracture, and provides an optimized balance of hardness, strength, and ductility for industrial use.

Industrial applications of the 8.8 M20x100 Allen bolt include oil and gas facilities, heavy mining equipment, construction machinery, and steel structure assemblies. The longer length allows fastening of thicker components and supports higher axial loads. It is also widely used in machines such as hydraulic presses, industrial cranes, and heavy production lines. Protective coatings like phosphating or galvanization further extend service life by increasing corrosion and wear resistance in harsh working environments.
WEBSITE: 20X100 8.8 allen bolt Iran