Based on our previous discussion of hot runner installation torque control and common bolt specifications, the mainstream materials available for hot runner bolts and their suitable application scenarios are as follows:
304 Stainless Steel: Low cost, good rust resistance, suitable for general hot runner applications below 200℃, making it a common entry-level choice.
316 Stainless Steel: Stronger corrosion resistance, suitable for injection molding applications using corrosive plastic raw materials, and less prone to rusting and jamming under long-term high temperatures.
High-Temperature Alloys (e.g., Inconel series): Can withstand temperatures above 300℃ for extended periods, exhibits extremely strong creep resistance, suitable for high-load precision hot runners, and less prone to loosening and breakage during long-term operation.
Choosing the right material can significantly reduce the probability of high-temperature failure of hot runner bolts.
