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原材料明细表 |
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Mil. T-21014 Rev. D |
Class 1 |
Class 2 |
Class 3 |
Class 4 |
Class 1 |
Class 2 |
Class 3 |
SAE-AMS-T-21014 |
Class 1 |
Class 2 |
Class 3 |
Class 4 |
Class 1 |
Class 2 |
Class 3 |
AMS 7725 B |
7725B |
— |
— |
— |
7725B |
— |
— |
ASTM-B-777-87 |
Class 1 |
Class 2 |
Class 3 |
Class 4 |
Class 1 |
Class 2 |
Class 3 |
Minimum Density (g/cc) |
16.85 |
17.15 |
17.75 |
18.25 |
16.85 |
17.15 |
17.75 |
Minimum Density (lbs/in3) |
0.608 |
0.619 |
0.641 |
0.659 |
0.608 |
0.619 |
0.641 |
Nominal W Content (wt.%) |
90 |
92.5 |
95 |
97 |
90 |
92.5 |
95 |
Nominal Nickel Content (wt.%) |
7.1 |
5.4 |
3.6 |
2.1 |
8.8 |
6.6 |
4.4 |
Nominal Iron Content (wt.%) |
2.9 |
2.1 |
1.4 |
0.9 |
1.2 |
0.9 |
0.6 |
Maximum Magnetic Perm |
n/a |
n/a |
n/a |
n/a |
<1.05 |
<1.05 |
<1.05 |
Typical Hardness (HRC) |
28 |
28 |
29 |
30 |
28 |
28 |
29 |
Modulus of Elasticity (x106 psi) |
45 |
48 |
50 |
52 |
45 |
48 |
50 |
Ultimate Tensile Strength Min. (ksi) |
120 |
120 |
120 |
110 |
110 |
110 |
110 |
0.2% Offset Yield Strength Min (ksi) |
80 |
80 |
80 |
80 |
75 |
75 |
75 |
Minimum % Elongation (1" Gauge Length) |
10 |
8 |
6 |
2 |
4 |
3 |
3 |