Based on our previous discussion of hot runner installation torque control and comparisons of different bolt materials, precise selection can be achieved based on three core dimensions:
Matching Operating Temperature: Choose 304 stainless steel for temperatures below 200℃, 316 stainless steel for temperatures below 250℃, and Inconel high-temperature alloy for high-load conditions above 300℃ to prevent creep loosening at high temperatures.
Compatibility with Injection Molding Raw Materials: Prioritize 316 stainless steel for corrosive plastic raw materials to prevent corrosion, rust, and jamming over long-term use.
Balancing Cost Requirements: Choose 316 stainless steel for general applications, balancing cost-effectiveness and durability; choose high-temperature alloy for high-precision continuous production; and choose 304 stainless steel for low-load applications with extremely low budgets.
Selecting bolts according to these points will perfectly suit your hot runner operating conditions, significantly reducing the probability of bolt failure.
