A439 Type D-2 - ASTM A439/A439M-2018(R2022)

Grade	A439 Type D-2
Corresponding Standard	ASTM A439/A439M-2018(R2022) Standard Specification for Austenitic Ductile Iron Castings
Classification	cast Iron

A439 Type D-2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	Cr	Ni
Minimum Value	-	1.5	0.7	-	1.75	18
Maximum Value	3	3	1.25	0.08	2.75	22

* Additions of 0.7 to 1.0 % of molybdenum can increase the mechanical properties above 425 °C.

A439 Type D-2 Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Hardness HBW
≥400	≥210	≥8	139~202

Approximate Comparison Table Cast Iron

United States	International Organization for Standardization	Germany	France	European Standard		United Kingdom
ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	BS EN/BS
A439 Type D-2	Ni-ResistD-2 S-NiCr20-2	GGG-NiCr20-2	FGS-Ni20Cr2	EN-GJSA-XNiCr20-2	EN-JS3011	AUS202A S-NiCr20-2 S2

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