ASTM A453 GR. 660 CLASS A B C D Studs Bolts Nuts Specification:
Material for construction: UNS 66286/ Alloy A286 ,
A286 bolting for High Temperature applications.
ASTM A453 GR. 660 CLASS A B C D Studs Bolts Nuts Specification Pdf Download:
ASTM A453 Gr. 660 Fasteners: Chemical and Mechanical Properties
| Standard | ASTM A453 Gr. 660 |
|---|---|
| Class | A, B, C & D |
| Material of Construction (MOC) | UNS 66286 / Alloy A286 |
| Dimensions | ASME B18.2.1, ASME B18.3 |
| Threads (Inches) | ASME B1.1 2A/3A Unified Threads |
| Threads (Metrics) | B1.13M 6h Coarse Threads |
| Additional Requirements | NACE MR0103/MR0175/ISO 15156 Compliance |
| Mandatory Requirements | Free from Mercury & Radioactive Contamination |
Chemical Composition
| Chemical Elements | Min. % | Max. % |
|---|---|---|
| Carbon (C) | – | 0.08 |
| Manganese (Mn) | – | 2.00 |
| Phosphorus (P) | – | 0.040 |
| Sulfur (S) | – | 0.030 |
| Silicon (Si) | – | 1.000 |
| Nickel (Ni) | 24.00 | 27.00 |
| Chromium (Cr) | 13.5 | 16.00 |
| Molybdenum (Mo) | 1.00 | 1.50 |
| Titanium (Ti) | 1.90 | 2.35 |
| Aluminum (Al) | – | 0.35 |
| Vanadium (V) | 0.10 | 0.50 |
| Boron (B) | 0.001 | 0.010 |
Mechanical Properties
| Grade | Grade 660 | Grade 660 |
|---|---|---|
| Class | A, B, C | D |
| Tensile Strength | 130 ksi / 895 MPa | 130 ksi / 895 MPa |
| Yield Strength | 85 ksi / 585 MPa | 105 ksi / 725 MPa |
| Elongation % | 15 min % | 15 min % |
| Reduction of Area % | 18 min % | 18 min % |
| Brinell Hardness | 248-341 | 248-341 |
| Rockwell Hardness | 24-37 HRC | 24-35 HRC |
Stress Rupture Test Requirements
| Grade | Class | Test Temp. (°F) | Test Temp. (°C) | Stress Min. (ksi) | Stress Min. (MPa) | Time to Rupture (Min. Hr.) | Elongation Min. % |
|---|---|---|---|---|---|---|---|
| Gr. 660 | A, B, C | 1200 | 650 | 56 | 385 | 100 | 5 |
