Homework SourseDetermine the SAE grade of bolt required for the bolt group
Determine the SAE grade of bolt required for the bolt group below for a safety factor of at least 3.
Solution
50,000
0100,000
50,000
090,000
50,000
100,000
50,00
50,00
55,000
FASTENER IDENTIFICATION
MARKING
NOTES:
ASTM A563 — Carbon and Alloy Steel Nuts.
ASTM A194/A194M — Carbon and Alloy Steel Nuts for Bolts
for High Pressure and High Temperature Service. thank you. :)
| IdentificationGrade Mark | Specification | FastenerDescription | Material | Nominal SizeRange (in.) | Mechanical Properties | ||
| Proof Load(psi) | Yield StrengthMin (psi) | Tensile StrengthMin (psi) | |||||
| NoGradeMark | SAE J429Grade 1 | Bolts,Screws,Studs | Low or Medium Carbon Steel | 1/4 thru 1-1/2 | 33,000 | 36,000 | 60,000 |
| ASTM A307Grades A&B | Low Carbon Steel | 1/4 thru 4 | — | — | |||
| SAE J429Grade 2 | Low or Medium Carbon Steel | 1/4 thru 3/4 Over 3/4 to 1-1/2 | 55,00033,000 | 57,00036,000 | 74,00060,000 | ||
| NoGradeMark | SAE J429Grade 4 | Studs | Medium Carbon Cold Drawn Steel | 1/4 thru 1-1/2 | — | 100,000 | 115,000 |
| B5 | ASTM A193Grade B5 | AISI 501 | 1/4 Thru 4 | — | 80,000 | 100,000 | |
| B6 | ASTM A193Grade B6 | AISI 410 | 85,000 | 110,000 | |||
| B7 | ASTM A193Grade B7 | AISI 4140, 4142, OR 4105 | 1/4 thru 2-1/2Over 2-1/2 thru 4Over 4 thru 7 | ——- | 105,00095,00075,000 | 125,000115,000100,000 | |
| B16 | ASTM A193Grade B16 | CrMoVa Alloy Steel | 105,00095,00085,000 | 125,000115,000100,000 | |||
| B8 | ASTM A193Grade B8 | AISI 304 | 1/4 and larger | — | 30,000 | 75,000 | |
| B8C | ASTM A193Grade B8C | AISI 347 | |||||
| B8M | ASTM A193Grade B8M | AISI 316 | |||||
| B8T | ASTM A193Grade B8T | Bolts,Screws,Studs for High-Temperature Service | AISI 321 | 1/4 and larger | — | 30,000 | 75,000 |
| B8 | ASTM A193Grade B8 | AISI 304Strain Hardened | 1/4 thr 3/4Over 3/4 thru 1Over 1 thru 1-1/4Over 1-1/4 thru 1-1/2 | ——— | 100,00080,00065,000 50,000 | 125,000115,000105,00 0100,000 | |
| B8C | ASTM A193Grade B8C | AISI 347Strain Hardened | |||||
| B8M | ASTM A193Grade B8M | AISI 316Strain Hardened | 95,00080,00065,000 50,000 | 110,000100,00095,00 090,000 | |||
| B8T | ASTM A193Grade B8T | AISI 321Strain Hardened | 100,00080,00065,000 50,000 | 125,000115,000105,000 100,000 | |||
| L7 | ASTM A320Grade L7 | Bolts,Screws,Studs for Low-Temperature Service | AISI 4140,4142 or 4145 | 1/4 thru 2-1/2 | — | 105,000 | 125,000 |
| L7A | ASTM A320Grade L7A | AISI 4037 | |||||
| L7B | ASTM A320Grade L7B | AISI 4137 | |||||
| L7C | ASTM A320Grade LC7 | AISI 8740 | |||||
| L43 | ASTM A320Grade L43 | AISI 4340 | 1/4 thru 4 | — | 105,000 | 125,000 | |
| B8 | ASTM A320Grade B8 | Bolts,Screws,Studs for Low-Temperature Service | AISI 304 | 1/4 and larger | — | 30,000 | 75,000 |
| B8C | ASTM A320Grade B8C | AISI 347 | |||||
| B8T | ASTM A320Grade B8T | AISI 321 | |||||
| B8F | ASTM A320Grade B8F | AISI 303or 303Se | |||||
| B8M | ASTM A320Grade B8M | AISI 316 | |||||
| B8 | ASTM A320Grade B8 | AISI 304 | 1/4 thru 3/4Over 3/4 thru 1Over 1 thru 1-1/4Over 1-1/4 thru 1-1/2 | ——— | 100,00080,00065,00 50,00 | 100,00080,00065,00 50,00 | |
| B8C | ASTM A320Grade B8C | AISI 347 | |||||
| B8F | ASTM A320Grade B8F | AISI 303or 303Se | |||||
| B8M | ASTM A320Grade B8M | AISI 316 | |||||
| B8T | ASTM A320Grade B8T | AISI 321 | |||||
| SAE J429Grade 5 | Bolts,Screws,Studs | Medium Carbon Steel, Quenched and Tempered | 1/4 thru 1Over 1 to 1-1/2 | 85,00074,000 | 92,00081,000 | 120,000105,000 | |
| ASTM A449 | 1/4 thru 1Over 1 to 1-1/2Over 1-1/2 thru 3 | 85,00074,000 55,000 | 92,00081,00058,000 | 120,000105,00090,000 | |||
| SAE J429Grade 5.1 | Sems | Low or Medium Carbon Steel, Quenched and Tempered | No. 6thru 3/8 | 85,000 | — | 120,000 | |
| SAE J429Grade 5.2 | Bolts,Screws,Studs | Low Carbon Martensitic Steel, Quenched and Tempered | 1/4 thru 1 | 85,000 | 92,000 | 120,000 | |
| A325 | ASTM A325Type 1 | High StrengthStructural Bolts | Medium Carbon Steel, Quenched and Tempered | 1/2 thru 11-1/8 thru 1-1/2 | 85,00074,000 | 92,00081,000 | 120,000105,000 |
| A325 | ASTM A325Type 2 | Low Carbon Martensitic Steel, Quenched and Tempered | 1/2 thru 1 | 85,000 | 92,000 | 120,000 | |
| A325 | ASTM A325Type 3 | Atmospheric Corrosion Resisting Steel, Quenched and Tempered | 1/2 thru 11-1/8 thru 1-1/2 | 85,00074,000 | 92,00081,000 | 120,000105,000 | |
| BB | ASTM A354Grade BB | Bolts,Studs | Alloy Steel, Quenched and Tempered | 1/4 thru 2-1/22-3/4 thru 4 | 80,00075,000 | 83,00078,000 | 105,000100,000 |
| BC | ASTM A354Grade BC | 105,00095,000 | 109,00099,000 | 125,000115,000 | |||
| SAE J429Grade 7 | Bolts,Screws, | Medium Carbon Alloy Steel, Quenched and Tempered4 | 1/4 thru 1-1/2 | 105,000 | 115,000 | 133,000 | |
| SAE J429Grade 8 | Bolts,Screws,Studs | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 thru 1-1/2 | 120,000 | 130,000 | 150,000 | |
| ASTM A354Grade BD | Alloy Steel, Quenched and Tempered4 | ||||||
| No GradeMark | SAE J429Grade 8.1 | Studs | Medium Carbon Alloy or SAE 1041 Modified Elevated Temperature Drawn Steel | 1/4 thru 1-1/2 | 120,000 | 130,000 | 150,000 |
| A490 | ASTM A490 | High StrengthStructural Bolts | Alloy Steel, Quenched and Tempered | 1/2 thru 1-1/2 | 120,000 | 130,000 | 150,000 min170,000 max |
| No GradeMark | ISO R898Class 4.6 | Bolts,Screws,Studs | Medium Carbon Steel, Quenched and Tempered | All Sizesthru 1-1/2 | 33,000 | 36,000 | 60,000 |
| No GradeMark | ISO R898Class 5.8 | 55,000 | 57,000 | 74,000 | |||
| 8.8or88 | ISO R898Class 8.8 | Alloy Steel, Quenched and Tempered | 85,000 | 92,000 | 120,000 | ||
| 10.9or109 | ISO R898Class 10.9 | 120,000 | 130,000 | 150,000 |
