This specification covers 5 grades of bolting with twelve classes of yield strength ranging from 50 to 120 ksi [345 to 827 Mpa] for used in high temperature service such as fasteners for pressure bessel and valve flanges. The specification is expressed in both inch-pound units and in SI units. Bolting Specialist primarily stocks and supply A453 Grade 660 Boltings for high temperature service. We stock round bar in Grade 660, Grade 651 & Grade 665 for quick manufacturing these bolts. These bolts are solution annealed and age hardened to provide maximum efficiency in their applications. We offer Rupture Test Facility for sufficient quantity order. ASTM A453M is a metric companion to ASTM A453 including metric sizes stud bolts, hex bolts, socket head cap screws, etc.
We offer precisely made Stud Bolts, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws as per ASTM A453 Grade 600, 651, 662, 665 & 668 in various tensile class. We produce these fasteners 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 as per drawing.
| Grade 660 | Class A | Class B | Class C | Class D |
| Grade 651 | Class A | Class B | ||
| Grade 662 | Class A | Class B | ||
| Grade 665 | Class A | Class B | ||
| Grade 668 | Class A | Class B |
| Element | |||||
|---|---|---|---|---|---|
| Content % | |||||
| Grade 660 UNS S66286 |
Grade 651 UNS S63198 |
Grade 662 UNS S66220 |
Grade 665 UNS S66545 |
Grade 668 UNS S66285 |
|
| Carbon | 0.08 max | 0.28 - 0.35 | 0.08 max | 0.08 max | 0.08 max |
| Manganese | 2.00 max | 0.75 - 1.50 | 0.40 - 1.00 | 1.25 - 2.00 | 2.00 max |
| Phosphorus | 0.04 max | 0.04 max | 0.04 max | 0.04 max | 0.04 max |
| Sulfur | 0.03 max | 0.30 max | 0.03 max | 0.03 max | 0.03 max |
| Silicon | 1.00 max | 0.30 - 0.80 | 0.40 - 1.00 | 0.10 - 0.80 | 1.00 max |
| Nickel | 24.00 - 27.00 | 8.00 - 11.00 | 24.00 - 28.00 | 24.00 - 28.00 | 17.50 - 21.50 |
| Chromium | 13.50 - 16.00 | 18.00 - 21.00 | 12.00 - 15.00 | 12.00 - 15.00 | 13.50 - 16.00 |
| Molybdenum | 1.00 - 1.50 | 1.00 - 1.75 | 2.00 - 3.50 | 1.25 - 2.25 | 1.50 max |
| Tungsten | --- | 1.00 - 1.75 | --- | --- | --- |
| Titanium | 1.90 - 2.35 | 0.10 - 0.35 | 1.80 - 2.10 | 2.70 - 3.30 | 2.20 - 2.80 |
| Columbium* | --- | 0.25 - 0.60 | --- | --- | --- |
| Aluminum | 0.35 max | --- | 0.35 max | 0.25 max | 0.50 max |
| Vanadium | 0.10 - 0.50 | --- | --- | --- | 0.50 max |
| Boron | 0.001 - 0.010 | --- | 0.001 - 0.010 | 0.01 - 0.07 | 0.001 - 0.010 |
| Copper | --- | 0.50 max | 0.50 max | 0.25 max | --- |
| 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 |
| Grade 651 | A | 100 | 690 | 70A 60B |
485 415 |
18 | 35 | 217-277 | 95 HRB | 29 HRC |
| Grade 651 | B | 95 | 655 | 60A 50B |
415 345 |
18 | 35 | 212-269 | 93 HRB | 28 HRC |
| Grade 662 | A | 130 | 895 | 85 | 585 | 15 | 18 | 248-321 | 24 HRC | 35 HRC |
| Grade 662 | B | 125 | 860 | 80 | 550 | 15 | 18 | 248-321 | 24 HRC | 35 HRC |
| Grade 665 | A | 170 | 1170 | 120 | 830 | 12 | 15 | 311-388 | 32 HRC | 41 HRC |
| Grade 665 | B | 155 | 1070 | 120 | 830 | 12 | 15 | 311-388 | 32 HRC | 41 HRC |
| Grade 668 | A and B | 130 | 895 | 80 | 858 | 15 | 18 | 248-321 | 24 HRC | 37 HRC |
| 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 | 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 |
| Grade 651 | A | Hot-cold worked at 1200°F [650°C] min with 15% reduction in cross sectional area, stress relief anneal at 1200°F [650°C] min or 4 hr, min |
|
| Grade 651 | B | Hot-cold worked at 1200°F [650°C] min with 15% reduction in cross sectional area, stress relief anneal at 1350°F [730°C] min or 4 hr, min |
|
| Grade 662 | A | 1800 +/- 25° F [980 +/- 14°C], hold 2 hr and liquid quench | 1350 to 1400° F [730 to 760°C], hold 20 hr, furnace cool to 1200 +/- 25°F [650 +/- 14°C], hold 20hr, air cool |
| Grade 662 | B | 1950 +/- 25° F [1065 +/- 14°C], hold 2 hr and liquid quench | 1350 to 1400° F [730 to 760°C], hold 20 hr, furnace cool to 1200 +/- 25°F [650 +/- 14°C], hold 20hr, air cool |
| Grade 665 | A | 1800 +/- 25° F [980 +/- 14°C], hold 3 hr and liquid quench | 1350 to 1400° F [730 to 760°C], hold 20 hr, furnace cool to 1200 +/- 25°F [650 +/- 14°C], hold 20hr, air cool |
| Grade 665 | B | 2000 +/- 25° F [1095 +/- 14°C], hold 3 hr and liquid quench | 1350 to 1400° F [730 to 760°C], hold 20 hr, furnace cool to 1200 +/- 25°F [650 +/- 14°C], hold 20hr, air cool |
| Grade 668 | 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 668 | 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 | 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 |
| Grade 651 | A and B | 1200 | 650 | 40 | 275 | 100 | 5 |
| Grade 662 | A and B | 1200 | 650 | 55 | 380 | 100 | 5 |
| Grade 665 | A | 1200 | 650 | 75 | 515 | 100 | 3 |
| Grade 665 | B | 1200 | 650 | 70 | 485 | 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.
| Grade | Class A | Class B | Class C | Class D |
|---|---|---|---|---|
| Grade 660 | FB 660A | FB 660B | FB 660C | FB 660D NR |
| Grade 651 | FB 651A | FB 651B | ||
| Grade 662 | FB 662A | FB 662B | ||
| Grade 665 | FB 665A | FB 665B | ||
| Grade 668 | FB 668A | FB 668B |