ASTM A453 Grade 660
ASTM A453/A453M Grade 660 Class A/B/C/D Bolts, Stud Bolts, Nuts & Washers
- Introduction
- Tensile Class
- Chemical Composition
- Mechanical Properties
- Heat Treatment
- Stress Rupture Requirement
- Marking Requirement
ASTM A453/A453M Grade 660 Class A/B/C/D Stainless Steel Bolting for High Temperature Applications
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 A/B/C & D. We produce these Grade 660 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 A/B/C/D Bolts are supplied with EN 10204 Type 3.1 MTC. We offer Rupture Test Facility for sufficient quantity order.
ASTM A453 Grade 660 Tensile Class
| Grade 660 | Class A | Class B | Class C | Class D |
ASTM A453 Grade 660 Chemical Composition (UNS S66286)
| 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
ASTM A453 Grade 660 Class A/B/C/D Mechanical Properties
| 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 | A, B and C | 130 | 895 | 85 | 585 | 15 | 18 | 248-341 | 24 HRC | 37 HRC |
| Grade 660 | D | 130 | 895 | 105 | 725 | 15 | 18 | 248-341 | 24 HRC | 35 HRC |
ASTM A453 Grade 660 Class A/B/C/D Heat Treatment Requirements
| Grade | Class | Solution Treatment | Hardening Treatment |
|---|---|---|---|
| Grade 660 | A | 1650 +/- 25° F [900 +/- 14°C], hold 2 hr, min and liquid quench | 1325 +/- 25° F [720 +/- 14°C], hold 16 hr, air cool |
| Grade 660 | B | 1800 +/- 25° F [980 +/- 14°C], hold 1 hr, min and liquid quench | 1325 +/- 25° F [720 +/- 14°C], hold 16 hr, air cool |
| Grade 660 | C | 1800 +/- 25° F [980 +/- 14°C], hold 1 hr, min and oil quench | 1425 +/- 25° F [775 +/- 14°C], hold 16 hr, air cool, followed by 1200 +/- 25°F [650 +/- 14°C], air cool |
| 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 Grade 660 Class A/B/C/D Stress Rupture Requirements
| Grade | Class | Test Temperature | Stress, Min | Time to Rupture, min, hA | Elongation, min, % | ||
|---|---|---|---|---|---|---|---|
| °F | °C | Ksi | Mpa | ||||
| Grade 660 | A, B and C | 1200 | 650 | 56 | 385 | 100 | 5 |
The combination bar specimen shall be tested continuously at the temperature and at the minimum stress specified or at a greater stress and shall rupture in a time not less than than specified.
ASTM A453 Grade 660 Class A/B/C/D Marking Requirements
| Grade | Class A | Class B | Class C | Class D |
|---|---|---|---|---|
| Grade 660 | BPF 660A | BPF 660B | BPF 660C | BPF 660D NR |
