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Chapter 7
Steel Fasteners
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CHEMICAL COMPOSITION
OF STEEL NUTS FOR HIGH-PRESSURE & HIGH-TEMPERATURE SERVICEf
|
ASTM A 194 |
AISI |
C |
Mn |
Si |
Cr |
Ni |
Mo |
Others |
|
1 |
carbon |
0.15 min |
1.00 |
0.40 |
--- |
--- |
--- |
--- |
| 2,
2HM, 2H |
carbon |
0.40 min |
1.00 |
0.40 |
--- |
--- |
--- |
--- |
| 4 |
C-Mo |
0.40-0.50 |
0.70-0.90 |
0.15-0.35 |
--- |
--- |
0.20-0.40 |
--- |
| 3 |
501 |
0.10 min |
1.00 |
1.00 |
4.00-6.00 |
--- |
0.20-0.40 |
--- |
|
6 |
410 |
0.15 |
1.00 |
1.00 |
11.50-13.50 |
--- |
--- |
--- |
| 6F |
416Sa |
0.15 |
1.25 |
1.00 |
12.00-14.00 |
--- |
--- |
--- |
| 6F |
416Seb |
0.37-0.49 |
1.25 |
1.00 |
12.00-14.00 |
--- |
--- |
--- |
| 7, 7M |
4140c |
0.08 |
0.65-1.10 |
0.15-0.35 |
0.75-1.20 |
--- |
0.15-0.25 |
--- |
| 8,
8A |
304 |
0.08 |
2.00 |
1.00 |
18.00-20.00 |
8.00-10.50 |
--- |
--- |
| 8C,
8CA |
347 |
0.08 |
2.00 |
1.00 |
17.00-19.00 |
9.00-13.00 |
--- |
Cb = 10 X Cd |
| 8M,
8MA |
316 |
0.08 |
2.00 |
1.00 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
--- |
| 8T,
8TA |
321 |
0.08 |
2.00 |
1.00 |
17.00-19.00 |
9.00-12.00 |
--- |
Ti = 5 X Cd |
| 8F,
8FA |
303Sa |
0.15 |
2.00 |
1.00 |
17.00-19.00 |
8.00-10.00 |
--- |
--- |
| 8F,
8FA |
303Seb |
0.15 |
2.00 |
1.00 |
17.00-19.00 |
8.00-10.00 |
--- |
--- |
| 8P,
8PA |
305e |
0.08 |
2.00 |
1.00 |
17.00-19.00 |
10.50-13.00 |
--- |
--- |
| 8,
8NA |
304N |
0.08 |
2.00 |
1.00 |
18.00-20.00 |
8.00-10.50 |
--- |
0.10-0.16 N |
| 8LN,
8LNA |
304Ne |
0.030 |
2.00 |
1.00 |
18.00-20.00 |
8.00-10.50 |
--- |
0.10-0.16 N |
| 8MN,
8MNA |
316N |
0.08 |
2.00 |
1.00 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
0.10-0.16 N |
| 8MLN,
8MLNA |
316Ne |
0.030 |
2.00 |
1.00 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
0.10-0.16 N |
| 8R,
8RA |
XM19 |
0.06 |
4.00-6.00 |
1.00 |
20.50-23.50 |
11.50-13.50 |
1.50-3.00 |
0.10-0.30 Cb |
| |
|
|
|
|
|
|
|
0.20-0.40 N |
| |
|
|
|
|
|
|
|
0.10-0.30 V |
| 8S,
8SA |
--- |
0.10 |
7.00-9.00 |
3.50-4.50 |
16.00-18.00 |
8.00-9.00 |
--- |
0.08-0.18 N |
| 8MLCuN |
--- |
0.020 |
1.00 |
0.80 |
19.50-20.50 |
17.50-18.50 |
6.00-6.50 |
0.18-0.22 N |
| |
|
|
|
|
|
|
|
0.50-1.00 Cu |
| a.
0.15% sulphur minimum. b. 0.15% selenium minimum. |
| c.
Other similar AISI designations meeting grades 7, 7M are 4142, 4145, 4140H,
4142H, 4145H. d. Minimum value. e. With restricted |
| carbon.
f. Phosphorus and sulphur requirements are not listed due to space
limitation; see ASTM A 194 for details. Single values are |
| maximums,
unless otherwise specified. |
|