Alloy Plate

"Carbon steel plates used to reinforce Grineer armor."

- In-Game Description

Alloy Plate is an uncommon component that can be found on Venus, Sedna, Ceres, and Pluto. It is usually found in quantities of 20 to 90, before Update 8 it was rarer (drops up to 25 maximum for each). Some people have had problems acquiring the amounts for certain weapons because of its restricted drop quantity limits.

Gathering Tips
These are based on opinions and may not be true. These should be viewed as advice for finding the materials until better facts are proven.
 * (Mobile) Defense missions are good places to gather materials. While it's unknown whether defense missions have higher drop rates, fact is that they spawn more enemies on average, making the chances for anything to drop higher.
 * Venera and Kiliken on Venus (Level 5-14)
 * Kappa and Tiamat on Sedna (Level 18-28)
 * Kiste on Ceres (Level 25-35)
 * Bosses always have higher frequency drops on rarer materials
 * The Jackal on Fossa, Venus (Level 5-14)
 * Kela De Thaym on Merrow, Sedna (Level 18-28)
 * Lieutenant Lech Kril on Exta, Ceres (Level 25-35)
 * A high ranked Thief's Wit mod can assist in finding materials.