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Chemical Composition
|
Element |
Composition Limits, % |
||||||||
|
UNS N07252 (Formerly Grade 689) |
UNS N07001 (Formerly Grade 685) |
UNS N07500 (Formerly Grade 684) |
UNS N07750 (Formerly Grade 688) |
UNS N07718 (Formerly Grade 718) |
UNS N07080 (Formerly Grade 80A) |
UNS N07752 |
UNS N09925 |
UNS N07725 |
|
|
Carbon |
0.10-0.20 |
0.03-0.10 |
0.15 max |
0.08 max |
0.08 max |
0.10 max |
0.020-0.060 |
0.03 max |
0.03 max |
|
Manganese |
0.50 max |
1.00 max |
0.75 max |
1.00 max |
0.35 max |
1.00 max |
1.00 max |
1.0 max |
0.35 max |
|
Silicon |
0.50 max |
0.75 max |
0.75 max |
0.50 max |
0.35 max |
1.00 max |
0.50 max |
0.5 max |
0.20 max |
|
Phosphorus |
0.015 max |
0.030 max |
0.015 max |
... |
0.015 max |
... |
0.008 max |
0.03 max |
0.015 max |
|
Sulfur |
0.015 max |
0.030 max |
0.015 max |
0.01 max |
0.015 max |
0.015 max |
0.003 max |
0.03 max |
0.010 max |
|
Chromium |
18.00-20.00 |
18.00-21.00 |
15.00-20.00 |
14.00-17.00 |
17.0-21.0 |
18.00-21.00 |
14.50-17.00 |
... |
... |
|
Cobalt |
9.00-11.00 |
12.00-15.00 |
13.00-20.00 |
1.00 maxA |
1.0 maxA |
... |
0.050 max |
... |
... |
|
Molybdenum |
9.00-10.50 |
3.50-5.00 |
3.00-5.00 |
... |
2.80-3.30 |
... |
... |
2.5-3.5 |
7.00-9.50 |
|
Columbium (Nb) + tantalum |
... |
... |
.. |
0.70-1.20 |
4.75-5.50 |
... |
0.70-1.20 |
0.5 max (Nb only) |
2.75-4.00 |
|
Titanium |
2.25-2.75 |
2.75-3.25 |
2.50-3.25 |
2.25-2.75 |
0.65-1.15 |
1.80-2.70 |
2.25-2.75 |
1.9-2.40 |
1.00-1.70 |
|
Aluminum |
0.75-1.25 |
1.20-1.60 |
2.50-3.25 |
0.40-1.00 |
0.20-0.80 |
0.50-1.80 |
0.40-1.00 |
0.1-0.5 |
0.35 max |
|
Zirconium |
... |
0.02-0.12 |
... |
... |
... |
... |
0.050 max |
... |
... |
|
Boron |
0.003-0.01 |
0.003-0.01 |
0.003-0.01 |
5.00-9.00 |
0.006 max |
... |
0.007 max |
... |
... |
|
Iron |
5.00 max |
2.00 max |
4.00 max |
... |
remainderB |
3.00 max |
5.00–9.00 |
22.0 min |
remainderB |
|
Copper |
... |
0.50 max |
0.15 max |
0.50 max |
0.30 max |
... |
0.50 max |
1.5–3.0 |
... |
|
Zirconium |
... |
... |
... |
... |
... |
... |
0.050 max |
... |
... |
|
Nickel |
remainderB |
remainderB |
remainderB |
70.00 min |
50.0-55.0 |
remainderB |
70.0 min |
42.0–46.0 |
55.0–59.0 |
Note:
A. If determined.
B. The element shall be determined arithmetically by difference.
Mechanical Properties
|
Alloy |
Heat Treatment |
Tensile Strength, min, psi [MPa] |
Yield Strength (0.2 % offset), min, psi [MPa] |
Elongation in 2 in. [50 mm] or 4D, min, % |
Reduction of Area, min, % |
Brinell Hardness |
|
N07252 |
solution + precipitation harden |
160 000 [1100] |
90 000 [620] |
20 |
18 |
310 min |
|
N07001 |
solution + stabilize + precipitation harden |
160 000 [1100] |
110 000 [760] |
158 |
188 |
310 min |
|
N07500 [rod andbar] |
anneal+ solution + stabilize + precipitation harden |
175 000 [120] |
105 000 [725] |
15 |
15 |
310 min |
|
N07500 [forgings] |
solution + stabilize + precipitation harden |
170 000 [1170] |
100 000 [690] |
20 |
18 |
310 min |
|
N07750 Type 1 |
solution at 2100°F [1149°C] + stabilize + precipitation harden |
140 000 [965] |
90 000 [620] |
8 |
... |
262 min |
|
N07750 Type 2C |
solution at 1800°F [982°C] + precipitation harden |
170 000 [1170] |
115 000 [790] |
18 |
18 |
302 to 363 |
|
N07750 Type 2D |
solution at 1800°F [982°C] + precipitation harden |
170 000 [1170] |
115 000 [790] |
15 [10]E |
15 [12]E |
302 to 363 |
|
N07750 Type 3 |
solution anneal at 2000°F [1093°C] + precipitation harden |
160 000 [1103], min 185 000 [1276], max |
100 000 [689], min 130 000 [896], max |
20 |
20 |
267-363, Bm 27-40, Rc |
|
N07752 Type 1 |
solution anneal at 1975°F [1080°C] + precipitation harden |
160 000 [1103], min 185 000 [1276], max |
100 000 [689], min 130 000[896], max |
20 |
20 |
267 to 363, Ba 27 to 40, Rc |
|
N07752 Type 2 |
solution anneal at 1975°F [1080°C] + precipitation harden |
140 000 [965] |
85 0000 [585] |
20 |
20 |
... |
|
N07718 |
solution + precipitation harden |
185 000 [1275] |
150 000 [1034] |
12 [6]E |
15 [8]E |
331 min |
|
N07080 |
solution + stabilize + precipitation harden |
135 000 [930] |
90 000 [620] |
20 |
... |
... |
|
N07725 |
solution + precipitation harden |
150 000 [1034] |
120 000 [827] |
20 |
35 |
43, Rc max |
|
N09925F |
solution + precipitation harden |
140 000 [965] |
105 000 [724] |
18 |
25 |
38, Rc max |
|
N09925G |
solution + precipitation harden |
140 000 [965] |
110 000 [758] |
18 |
25 |
38, Rc max |
Note:
A. The supplier shall demonstrate that the material will meet fully heat-treated properties after full heat treatment in accordance with Table 2.
B. Forgings.
C. Up to 2.50 in. [63.5 mm], exclusive.
D. 2.50 to 4.00 in. [63.5 to 101.6 mm], exclusive.
E. These values apply for tension specimens machined tangentially from near the center of large disk forgings over 50 in.2 [3225.8 mm2] in cross section or radially from rings 3 in. [76.2 mm] or more in thickness.
F. Cold worked, solution annealed and aged, 0.625 in. [15.9 mm] to 3 in. [76.2 mm], inclusive.
G. Hot worked, solution annealed and aged, 1 in. [25.4 mm] or over.
