Alloy E4320 in bar
SPECIFICATIONS: GRADE ALLOY 4320, AISI 4320, UNS G43200
Castle Metals stocks a wide range of Alloy E4320 in bar distributed globally from our distribution centers in the U.S., Canada, Mexico, U.K, Singapore, and Shanghai. Customers calling for 4320 a lot of times are discouraged by extended lead-times. Where it makes sense, Castle can use Lean events to reduce lead-times in our customer supply chains.
Alloy E4320 is a low Carbon Case Hardening Nickel-Chromium-Moly alloy with good toughness, heat treat response, and strength. It has a tough, ductile core. Its low Carbon levels give it good weldability. 4320 shows very good shock resistance. Castle orders E4320 to AQ-aircraft quality / BQ-bearing quality for the most demanding applications.
Bar Properties
Grade 4320 Properties
| grade | 
            shape  | 
            size range | 
            condition of steel | 
            specification | 
            brinell hardness (bhn) max  | 
            Relative machinability Based on aisi 1212 as 100%  | 
        
| 4320 | Rounds   | 
            3/4" - 10"   | 
            Hot Rolled  | 
            ASTM A-29 ASTM A-322 ASTM A-534 ASTM A-304 AMS 2301  | 
            229  | 
            60%  | 
        
For more information, see Alloy Steel Quick Guide
Chemistry(range or Maximum in %)
Chemistry (range or maximum in %)
| Grade | 
            c | mn | p max | s | si | ni | cr | mo | 
| 4320 | 
            .17/.22  | 
            .45/.65  | 
            0.025  | 
            0.015  | 
            .15/.35  | 
            1.65/2.00 | 
            .40/.60 | 
            .20/.30 |