Alloy 4820 in bar
SPECIFICATIONS: GRADE ALLOY 4820, AISI 4820, UNS G48200
Castle Metals stocks a wide range of Alloy 4820 in bar distributed globally from our distribution centers in the U.S., Canada, Mexico, U.K, Singapore, and Shanghai. When our phone rings with 4820 inquiries, many customers also tell us they are overwhelmed with supply chain complexity. Where it makes sense, Castle Metals can simplify our customers' inbound network and reduce our customers' total cost of ownership.
Alloy 4820 is a Nickel/Moly alloy with extremely good toughness, stability in heat treatment, and case depth. It is a low carbon case hardening alloy that has a tough, ductile core. It is used for applications where toughness and shock resistance is critical such as mining equipment and hand tools. 4820 is produced to BQ-Bearing Quality for the most demanding applications.
Bar Properties
Grade 4820 Properties
grade |
shape |
size range |
condition of steel |
specification |
brinell hardness (bhn) max |
relative machinability based on aisi 1212 as 100% |
4820 | Rounds |
3/4" -10" |
Hot Rolled |
ASTM A-29 ASTM A-304 ASTM A-322 ASTM A-534 |
225 |
49% |
Cold Finished |
+ ASTM A-108 |
55% |
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 |
4820 |
.18/.23 |
.50/.70 |
0.025 |
0.015 |
.15/.35 |
3.25/3.75 |
- |
.20/.30 |