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ASTM A732 A732M for
Carbon Steel Castings in Steel Foundry in China
ASTM A732 grades include 1A, 2A, 2Q,
3A, 3Q, 4A, 4Q, 5N, 6N, 7Q, 8Q, 9Q, 10Q, 11Q, 12Q, 13Q, 14Q, 15A.
The following is their chemical and mechanical requirements.
This standard is for carbon and low-alloy steel and cobalt alloy
castings made by the investment casting process.
Steel castings shall be heat treated either by full annealing,
normalizing, normalizing and tempering, or quenching and tempering
to obtain the specified properties or other properties that have
been agreed upon within each grade.
All steel castings shall conform to the requirements for chemical
composition specified.
|
Chemical
Requirements |
|
Grade |
1A |
2A,2Q |
3A,3Q |
4A,4Q |
5N |
6N |
7Q |
8Q |
|
Type |
Low Carbon |
Medium |
Medium |
Medium |
Vanadium |
Manganese |
Chromium |
Chromium |
|
|
|
Carbon |
Carbon |
Carbon |
|
Molybdenum |
Molybdenum |
Molybdenum |
|
|
IC 1020A |
IC 1030 |
IC 1040 |
IC 1050 |
IC 6120 |
IC 4020 |
IC 4130 |
IC 4140 |
|
Carbon |
0.15 to 0.25 |
0.25 to 0.35 |
0.35 to 0.45 |
0.45 to 0.55 |
0.30 max |
0.35 max |
0.25 to 0.35 |
0.35 to 0.45 |
|
Manganese |
0.20 to 0.60 |
0.70 to 1.00 |
0.70 to 1.00 |
0.70 to 1.00 |
0.70 to 1.00 |
1.35 to 1.75 |
0.40 to 0.70 |
0.70 to 1.00 |
|
Phosphorus, max |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
|
Sulfur, max |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
|
Silicon |
0.20 to 1.00 |
0.20 to 1.00 |
0.20 to 1.00 |
0.20 to 1.00 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
|
Nickel |
|
|
|
|
|
|
|
|
|
Chromium |
|
|
|
|
|
|
0.80 to 1.10 |
0.80 to 1.10 |
|
Molybdenum |
|
|
|
|
|
0.25 to 0.55 |
0.15 to 0.25 |
0.15 to 0.25 |
|
Vanadium |
|
|
|
|
0.05 to 0.15 |
|
|
|
|
Residual Elements: |
|
|
|
|
|
|
|
|
|
Copper |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
|
Nickel |
0.5 |
0.5 |
0.5 |
|
0.5 |
0.5 |
|
0.5 |
|
Chromium |
0.35 |
0.35 |
0.35 |
|
0.35 |
0.35 |
|
|
|
Molybdenum Tungsten |
0.25 |
|
|
|
0.25 |
|
|
|
|
Tungsten |
|
0.1 |
0.1 |
0.1 |
|
0.25 |
0.1 |
0.1 |
|
Total content of these |
1 |
1 |
1 |
0.6 |
1 |
1 |
0.6 |
1 |
|
residual elements |
|
|
|
|
|
|
|
|
|
Grade |
9Q |
10Q |
11Q |
12Q |
13Q |
14Q |
15A |
|
Type |
Chrome Nickel |
Chrome Nickel |
Nickel |
Chromium |
Chrome Nickel |
Chrome Nickel |
Chromium |
|
|
Molybdenum |
Molybdenum |
Molybdenum |
Vanadium |
Molybdenum |
Molybdenum |
|
|
|
IC 4330 |
IC 4340 |
IC 4620 |
IC 6150 |
IC 8620 |
IC 8630 |
IC 52100 |
|
Carbon |
0.25 to 0.35 |
0.35 to 0.45 |
0.15 to 0.25 |
0.45 to 0.55 |
0.15 to 0.25 |
0.25 to 0.35 |
0.95 to 1.10 |
|
Manganese |
0.40 to 0.70 |
0.70 to 1.00 |
0.40 to 0.70 |
0.65 to 0.95 |
0.65 to 0.95 |
0.65 to 0.95 |
0.25 to 0.55 |
|
Phosphorus, max |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
|
Sulfur, max |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
|
Silicon |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
0.20 to 0.80 |
|
Nickel |
1.65 to 2.00 |
1.65 to 2.00 |
1.65 to 2.00 |
|
0.40 to 0.70 |
0.40 to 0.70 |
|
|
Chromium |
0.70 to 0.90 |
0.70 to 0.90 |
|
0.80 to 1.10 |
0.40 to 0.70 |
0.40 to 0.70 |
1.30 to 1.60 |
|
Molybdenum |
0.20 to 0.30 |
0.20 to 0.30 |
0.20 to 0.30 |
|
0.15 to 0.25 |
0.15 to 0.25 |
|
|
Vanadium |
|
|
|
0.15 min |
|
|
|
|
Residual Elements: |
|
|
|
|
|
|
|
|
Copper |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
|
Nickel |
|
|
|
0.5 |
|
|
0.5 |
|
Chromium |
|
|
0.35 |
|
|
|
|
|
Molybdenum Tungsten |
|
|
|
0.1 |
|
|
|
|
Tungsten |
0.1 |
0.1 |
0.1 |
|
0.1 |
0.1 |
0.1 |
|
Total content of these |
0.6 |
1 |
1 |
1 |
1 |
1 |
0.6 |
|
residual elements |
|
|
|
|
|
|
|
|
Investment Casting (IC) numbers are to be
used only for nomenclature comparison. |
|
|
|
|
TABLE Chemical Requirements-Cobalt
Alloys |
|
Grade |
21 |
31 |
|
Carbon |
0.20–0.30 |
0.45–0.55 |
|
Manganese, max. |
1 |
1 |
|
Silicon, max |
1 |
1 |
|
Phosphorus, max |
0.04 |
0.04 |
|
Sulfur, max |
0.04 |
0.04 |
|
Chromium |
25.0–29.0 |
24.5–26.5 |
|
Nickel |
1.7–3.8 |
9.5–11.5 |
|
Cobalt |
remainder |
remainder |
|
Molybdenum |
5.0–6.0 |
.. |
|
Tungsten |
.. |
7.0–8.0 |
|
Iron, max. |
3 |
2 |
|
Boron |
0.007 max |
0.005–0.015 |
|
Tensile Requirements |
|
Grade |
|
Tensile strength, min |
|
Yield strength, min |
Elongation, in 2-in. |
Heat |
|
|
ksi |
[MPa] |
ksi |
[MPa] |
[50-mm] or diameters |
Treatment |
|
1A |
60 |
[414] |
40 |
[276] |
24 |
AA |
|
2A |
65 |
[448] |
45 |
[310] |
25 |
|
|
2Q |
85 |
[586] |
60 |
[414] |
10 |
TB |
|
3A |
75 |
[517] |
48 |
[331] |
25 |
|
|
3Q |
100 |
[689] |
90 |
[621] |
10 |
|
|
4A |
90 |
[621] |
50 |
[345] |
20 |
|
|
4Q |
125 |
[862] |
100 |
[689] |
|
|
|
5N |
85 |
[586] |
55 |
[379] |
22 |
TC |
|
6N |
90 |
[621] |
60 |
[414] |
20 |
|
|
7Q |
150 |
[1030] |
115 |
[793] |
|
|
|
8Q |
180 |
[1241] |
145 |
[1000] |
|
|
|
9Q |
150 |
[1030] |
115 |
[793] |
|
|
|
10Q |
180 |
[1241] |
145 |
[1000] |
|
|
|
11 |
120 |
[827] |
100 |
[689] |
10 |
|
|
12Q |
190 |
[1310] |
170 |
[1172] |
|
|
|
13Q |
105 |
[724] |
85 |
[586] |
10 |
|
|
14Q |
150 |
[1030] |
115 |
[793] |
|
|
|
15AD |
.. |
.. |
.. |
.. |
.. |
|
|
Annealed.
Quenched and tempered. Normalized and tempered. Hardness
Rockwell B, 100 max. |
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