What grade is ASTM A574?
ASTM A574 Supplementary Grades
| Grades | ||
|---|---|---|
| AISI 4037 | AISI 4042 | AISI 4137 |
| AISI 4145 | AISI 4340 | AISI 8740 |
What is 8.8 Hardness?
Mechanical properties
| Grade, material & condition | Nominal thread diameter size range [mm] | Core hardness [Rockwell] |
|---|---|---|
| Class 5.8 Low or medium carbon steel; cold worked | 5–24 | B82–95 |
| Class 8.8 Medium carbon steel; quench and tempered | Under 16 (inc.) | C18-31 |
| 17–72 | C23–34 | |
| Class 8.8 low carbon Low carbon boron steel; quench and tempered |
How strong is ASTM F835?
Mechanical PropertiesAlloy Steel Flat Socket Cap Screw
| Quenched & Tempered Alloy Steel | Per ASTM F835-16 | |
|---|---|---|
| Nominal Diameter | Full-Size Screws | Product Hardness |
| Tensile Strength | Vickers DPH | |
| ksi | ||
| 1/2″ & under | 145 min | 382-434 |
What is ASTM A193 Grade B7?
Grade B7 is a heat-treated chromium-molybdenum alloy steel with minimum tensile requirement of 100 ksi, yield of 75 ksi and maximum hardness of 35 HRC. ASTM A193 specification covers requirements for chemical composition, mechanical properties, hardness, heat-treatment, recommended nuts-washers for Grade B7 fasteners.
What is a Grade 9 nut?
Available in coarse and fine threads all yellow zinc plated. Grade 9 bolts are made with a 8640 Alloy steel which is the ultimate in high strength steel. The Grade 8 counterpart has a tensile strength of 150,000psi whereas Grade 9 hardware has a tensile strength of 180,000psi.
What grade is a 8.8 bolt?
Grade 8.8 Bolts belong to the DIN 933 grade 8.8 standard. This is a structural grade for bolts. This is a medium carbon steel bolt specification. These bolts are heat treated by quenched and tempered methods.