Austenitic Ductile Iron

				Minimum	Minimum			Chemical
Specifing	Spec.	Type:	Class or	Tensile	Yield	%		Requirements %						Notes:
Body:	Number:		Grade:	Strength	Strength	Elong	BHN	C	Si	Mn	P	Ni	Cr
				PSI:	PSI:			Max.			Max.
ASTM	A 439	D-2		58	30	8	139-	3.00	1.50-	.70-	0.08	18.00-	1.75-	Not intensionally added
							202		3.00	1.25		22.00	2.75
		D-2B		58	30	7	148-	3.00	1.50-	.70-	0.08	18.00-	2.75-	Additions of .7-1.00%
							211		3.00	1.25		22.00	4.00	Molybdenum will increase
		D-2C		58	28	20	121-	2.90	1.00-	1.80-	0.08	21.00-	0.50	the mechanical properties
							171		3.00	2.40		24.00	Max	above 800 degrees.
		D-3		55	30	6	139-	2.60	1.00-	1.00	0.08	28.00-	2.50-
							202		2.80	Max.		32.00	3.00	Due to the vast differences in
		D-3A		55	30	10	131-	2.60	1.00-	1.00	0.08	28.00-	1.00-	mechanical properties and
							193		2.80	Max.		32.00	1.50	chemical composition of the
		D-4		60			202-	2.60	5.00-	1.00	0.08	28.00-	4.50-	different types, Oil City may
							273		6.00	Max.		32.00	5.50	require minimum order
		D-5		55	30	20	131-	2.40	1.00-	1.00	0.08	34.00-	0.10	quantities due to induction
							185		2.80	Max.		36.00	Max.	melting requirements.
		D-5B		55	30	6	131-	2.40	1.00-	1.00	0.08	34.00-	2.00-
							193		2.80	Max.		36.00	3.00
		D-5S		65	30	10	131-	2.30	4.90-	1.00	0.08	34.00-	1.75-
							193		5.50	Max.		37.00	2.25

Ref: ASTM Annual Book of Standards Ferrous Castings: Ferroalloys									Most common type poured at Oil City modified with .70 Mo.
Section 1 Volume 01.02 for additional data.