Alloys Cast

ACI Designation	SAE	UNS Number	ASTM Specifications (a)	Compositions (b), %
ACI Designation	SAE	UNS Number	ASTM Specifications (a)	C max.	Cr	Ni	Si max.
HA	-	-	A217	0.20	8 to 10		1.00
HC	-	-	A297,A608	0.50	26 to 30	4 max	2.00
HD	-	J93005	A297, A608	0.50	26 to 30	4 to 7	2.00
HE	70312	J93403	A297, A608	0.35	26 to 30	8 to 11	2.00
HF	70308	J92603	A297, A608	0.35	19 to 23	9 to 12	2.00
HH	70309	J93503	A297, A608	0.35	24 to 28	11 to 14	2.00
HI		J94003	A297, A567, A608	0.35	28 to 32	18 to 22	2.00
HK	70310	J94224	A297, A351, A567, A608	0.35	24 to 28	18 to 22	2.00
HL		J94604	A297, A608	0.35	28 to 32	18 to 22	2.00
HN	70311	J94213	A297, A608	0.35	19 to 23	23 to 27	2.00
HP		-	A297	0.35	24 to 28	33 to 37	2.00
HP-50WZ(c)		-		0.45	24 to 28	33 to 37	2.50
HT	70330	J94605	A297, A351, A567, A608	0.35	13 to 17	33 to 37	2.50
HU	70331	-	A297, A608	0.35	17 to 21	37 to 41	2.50
HW		-	A297, A608	0.35	10 to 14	58 to 62	2.50
HX	70355	-	A297, A608	0.35	15 to 19	64 to 68	2.50

a). ASTM Designations are same as ACI Designations.
b). Remaining Fe in all compositions. Manganese content: 0.35 to 0.65% for HA, 1% for HC, 1.5% for HD and 2% for the other alloys. Phosphorous and Sulphur contents: 0.04% for but HP-50WZ, Molybdenum is intentionally added to HA, which has 0.90 to 1.2% Mo; maximum for other alloys is set at 0.5% Mo. HH also contains 2% N max.
c). Also contains 4 to 6% W, 1.0% Zr, and 0.035% max. S and P