|
ACI
Designation
|
SAE
|
UNS
Number
|
ASTM
Specifications
(a)
|
Compositions
(b), %
|
| 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
|
