Marage 300 - ASTM A 646/A646M-2024

Grade	Marage 300
ASTM Specification or Grade	Grade 20
Corresponding Standard	ASTM A646/A646M-2024 Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings
Classification	Alloy Steel

Marage 300 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Ni	Mo	Ti	Co	Al	More
Minimum Value	-	-	-	-	-	18	4.7	0.5	8.5	0.05	B, Zr, Ca added
Maximum Value	0.03	0.1	0.1	0.01	0.01	19	5.2	0.8	9.5	0.15	B, Zr, Ca added

* If any of the following elements are not specified, the following maximum limits shall apply: Nickel 0.35 %; Chromium 0.20 %; Molybdenum 0.06 %; Copper 0.35 %

Marage 300 Mechanical Properties

Heat Treatment or Condition	Hardness HBW
Annealing	≤321

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!