Selection Guide for Grizzly Screen Bars Material Grades: Mn13 or Mn18

When a grizzly screen starts losing bars, the whole crushing circuit suffers. Throughput drops, maintenance crews work overtime, and operating costs climb fast. Choosing the correct material grade for your Grizzly Screen Bars may look like a small decision, but it directly impacts wear life and downtime. Mn13 and Mn18 are both high‑manganese steels with strong wear resistance, yet they perform very differently in real service. Understanding those differences helps you avoid premature failures and get the most out of every replacement.

Mn13: The Reliable Workhorse

Mn13—most people just call it Hadfield steel—has been the go‑to for Grizzly Screen Bars for ages. With about 13% manganese and 1.2% carbon, its real magic is in work hardening. Every hit makes the surface tougher, but the core stays strong and resilient. That means it soaks up hard knocks without breaking. If you're dealing with medium‑hard rock, average‑sized feed, and a steady workload, Mn13 nails that sweet spot between toughness, long life, and reasonable cost. Lots of quarries and recycling operations stick with Mn13 because it simply works. You get solid, reliable performance without blowing your budget—it's still the smart choice for moderate‑duty screening.

Mn18: Built for Severe Abrasion

Mn18 raises manganese content to about 18%, which intensifies work hardening and boosts resistance to abrasive wear. As a result, Grizzly Screen Bars made from Mn18 hold their profile longer in aggressive duties. The trade‑off is reduced toughness—under extremely large, angular, high‑impact loads, brittle fracture becomes a risk. But where high‑pressure sliding abrasion dominates, such as primary scalping of hard, gritty material, Mn18 usually lasts longer. Plants struggling with bars wearing thin or rounding off often benefit from switching grades, since Mn18 preserves both edge shape and screening efficiency over a longer interval.

Choose by Your Actual Wear Pattern

Neither grade wins in every situation. Feed hardness, lump size, moisture, and bar design all influence wear. A practical method is to review the wear history of your existing Grizzly Screen Bars: frequent cracking points toward Mn13, while gradual thinning or profile loss favors Mn18. Matching the steel to the real duty is what unlocks its full value.

Material grade is more than a metallurgical detail—it is a direct way to cut downtime and control maintenance costs. If you are unsure which grade fits your plant, share your operating conditions with our team. We will help you select the right Grizzly Screen Bars for reliable, long‑term performance.