These 8-inch by 4-inch H.D. Forged Steel wheels are a powerhouse solution for heavy-duty industrial applications. These wheels are hot forged from high carbon steel billets, enhancing their grain structure, ductility, and tensile strength (64,000 psi). With precision machining, they meet tight tolerances, ensuring flat surfaces with rounded edges. Offering the greatest load capacity, impact strength, and rollability among caster wheels. This particular wheel has a load rating of 20000 lbs. and can withstand temperatures from -30 to 250 Fahrenheit. With the proper wheels and bearings, these wheels are capable of withstanding temperatures up to 800 degrees. Reach out to if you would like to go beyond the standard limits.