We offer precisely made Stud Bolts, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Threaded Rods, Nuts & Washers as per ASTM A453 Grade 600 Class D. We produce these Grade 660 Class D Bolts from 3/8" to 4" in imperial and upto M100 in metric sizes. Larger size bolts can be made to order as per request. We also undertake custom made boltings in A453 Gr 660 as per drawing. We stock premium and surplus bar stock in Grade 660 (UNS S66286 ; Alloy A286) for quick manufacturing and shorter delivery periods. These ASTM A453 Grade 660 Class D Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.
| Element | |
|---|---|
| Content % |
|
| Grade 660 UNS S66286 |
|
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Phosphorus | 0.04 max |
| Sulfur | 0.03 max |
| Silicon | 1.00 max |
| Nickel | 24.00 - 27.00 |
| Chromium | 13.50 - 16.00 |
| Molybdenum | 1.00 - 1.50 |
| Tungsten | --- |
| Titanium | 1.90 - 2.35 |
| Columbium* | --- |
| Aluminum | 0.35 max |
| Vanadium | 0.10 - 0.50 |
| Boron | 0.001 - 0.010 |
| Copper | --- |
* Or Columbium plus Tantalum
| Grade | Class | Tensile Strength | Yield Strength | Elongation in 4D, min, % |
Reduction of Area, min, % |
Brinell Hardness Number |
Approximate Rockwell Hardness, B & C |
|||
|---|---|---|---|---|---|---|---|---|---|---|
| Ksi | Mpa | Ksi | Mpa | min | max | |||||
| Grade 660 | D | 130 | 895 | 105 | 725 | 15 | 18 | 248-341 | 24 HRC | 35 HRC |
| Grade | Class | Solution Treatment | Hardening Treatment |
|---|---|---|---|
| Grade 660 | D | 1650 +/- 25° F [900 +/- 14°C], hold 2 hr, min and liquid quench 1800 +/- 25° F [980 +/- 14°C], hold 1 hr, min and liquid quench |
1325 +/- 25° F [720 +/- 14°C], hold 16 hr, air cool, If required to achieve properties, second age: 1200 +/- 25°F [650 +/- 14°C], air cool |
ASTM A453/A453M does not state any stress rupture test requirement for Grade 660 Class D Boltings.
| Grade | Class D |
|---|---|
| Grade 660 | BPF 660D NR |