ASTM A193 Gr b7 steel threaded rod specs
ASTM A193 is alloy steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
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Material according to ASTM A193 B7 is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
1.Main grades for our threaded rods:
ASTM A193: B7, B7M, B16, B8 class 1, B8 class 2, B8M class 1, B8M class 2, B8T etc.
ASTM A320: L7, L7M, L43, B8 class 1, B8 class 2, B8M class 1, B8M class 2, B8T etc.
2.Our supplied sizes: 1/2'' to 4''
3.Surface finished:Plain, Hot dip galvanized, Galvanization, Dacroment, Xylan .
4.Packing: Standard packing or According to customer's requirements
5.ASTM A193 B7 property:
| Grade |
Sizes |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
HBW |
HRC |
| A193 B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
321 max |
35 max |
| 2-5/8 - 4 |
115 |
95 |
16 |
50 |
| 4-1/8 - 6 |
100 |
75 |
18 |
50 |
6.A193 B7 materials 4140 chemical composition
| Element |
B7 (AISI 4140) |
| Carbon |
0.38 - 0.48% |
| Manganese |
0.75 - 1.00% |
| Phosphorus, max |
0.04% |
| Sulfur, max |
0.04% |
| Silicon |
0.15 - 0.35% |
| Chromium |
0.80 - 1.10% |
| Nickel |
|
| Molybdenum |
0.15 - 0.25% |
7.Recommended Nuts,Bolts & Washer
| Bolt Grade |
Nuts |
Washers |
| B7 |
A194 Grade 2H |
F436 |
| B8 Class 1 |
A194 Grade 8 |
SS304 |
| B8M Class 1 |
A194 Grade 8M |
SS316 |
| B8 Class 2 |
A194 Grade 8 |
SS304 |
| B8M Class 2 |
A194 Grade 8M |
SS316 |
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