4620 - ASTM A 646/A646M-2024

Grade	4620
ASTM Specification or Grade	Grade 3
Corresponding Standard	ASTM A646/A646M-2024 Standard Specification for Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings
Classification	Alloy Steel

4620 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Ni	Mo
Minimum Value	0.17	0.2	0.45	-	-	1.65	0.2
Maximum Value	0.22	0.35	0.65	0.015	0.012	2	0.3

* 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 %

4620 Mechanical Properties

Heat Treatment or Condition	Hardness HBW
Annealing	≤229

Approximate Comparison Table Processing Titanium and Titanium Alloys

China	United States		International Organization for Standardization	Germany
GB	ASTM	UNS	ISO	DIN EN/DIN	W-Nr.
TA3	Grade 3	R50550	Grade 3(Ti≥99.14)	Ti4(Ti≥99.23)	3.7065

4620 Corresponding Standards(Same grade name, different standards)

1	ASTM A29/A29M-2012
	4620 G46200
2	SAE J404-2000
	4620 G46200
3	ASTM A29/A29M-2020
	4620 G46200
4	ASTM A519/A519M-2024
	4620
5	ASTM A646/A646M-2024
	4620 Grade 3

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