D6AC - ASTM A 646/A646M-2024

Grade	D6AC
ASTM Specification or Grade	Grade 9
Corresponding Standard	ASTM A646/A646M-2024 Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings
Classification	Alloy Steel

D6AC Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	V
Minimum Value	0.45	0.15	0.6	-	-	0.9	0.4	0.9	0.08
Maximum Value	0.5	0.3	0.9	0.01	0.01	1.2	0.7	1.1	0.15

* 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 %

D6AC Mechanical Properties

Heat Treatment or Condition	Hardness HBW
Annealing	≤285

D6AC Corresponding Standards(Same grade name, different standards)

1	GB /T 38809-2020
	D6AC 45CrNiMo1VA
2	GJB 5063-2001
	D6AC 45CrNiMo1VA
3	ASTM A646/A646M-2024
	D6AC Grade 9

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