Alloy Steel Fasteners come in different types of alloys. They are made up of different things, such as chromium, vanadium, tungsten, and molybdenum. When these elements are added to the mix, they make the alloys strong and resistant to corrosion. Amardeep Steel is a leading manufacturer and supplier of Alloy Steel Fasteners in India.
There are many different sizes, grades, and types of alloy steel fasteners. There are different types of fasteners that range in length from M12 to M72, such as studs, bolts, nuts, washers, and so on. The Grade B7 Alloy Steel Bolts are made from a chromium-molybdenum alloy and treated with quenching and tempering to make them stronger.
This way of making the ASTM A193 Grade B7 Nuts makes them stronger.
| Specifications | ASTM A 193 ASME SA 193 |
| Standard | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Screw Type | Alloy Threaded Screw, Hex Head Screw, Socket Head Screw, Socket Set Screw, Blind Rivet, Concrete Screw, Shoulder Screw, Anchor Screw, Panel Screw, Machine Screw etc. |
| Bolts Types | Alloy Hex Head Bolt, Hex Bolt, Square Bolt, Eye Bolt, T Bolt, U Bolt, Lag Bolt, Counter sunk Bolt etc. |
| Washer Types | Alloy Lock Washer, Machine Washers, Star Washers, Sealing Washer, Split Washer etc. |
| Studs Types | Alloy Double Ended Studs, Threaded Tod, Tie Bars, Tie Rodsetc. |
| Nut Types | Alloy Coupling Nut, Hex Head Nut, Wing Nut, Square Nut, Panel Nut, T Nut, Acorn Nuts, Dome Nut, Eye Nut, Lock Nut etc. |
| Element | B7 (AISI 4140) Fasteners | B8 (AISI 304) Fasteners | B8M (AISI 316) |
| Carbon | 0.37 - 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 - 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 - 1.20% | 18.0 - 20.0% | 16.0 - 18.0% |
| Nickel | 8.0 - 11.0% | 10.0 - 14.0% | |
| Molybdenum | 0.15 - 0.25% | 2.00 - 3.00% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| Alloy Steel B7 Fasteners | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 - 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 - 7 | 100 | 75 | 18 | 50 | |
| B8 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M Class 1 | All | 75 | 30 | 30 | 50 |
| Alloy Steel B8 Class 2 Fasteners | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 - 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 - 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 - 1-1/2 | 100 | 50 | 28 | 45 | |
| Alloy Steel B8M Class 2 Fasteners | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 - 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 - 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 - 1-1/2 | 90 | 50 | 30 | 45 |
| Size | Finished Hex | Heavy Hex | Finished Jam | Heavy Hex Jam | Square | Heavy Square |
| 1/2" | 3.75 | 6.54 | 2.62 | 4.00 | 5.78 | 7.87 |
| 5/8" | 7.33 | 11.9 | 4.93 | 6.96 | 10.8 | 14.3 |
| 3/4" | 11.9 | 19.3 | 7.70 | 11.0 | 15.4 | 23.5 |
| 7/8" | 19.0 | 29.7 | 12.0 | 16.7 | 24.5 | 36.2 |
| 1? | 28.3 | 42.5 | 17.6 | 23.5 | 36.3 | 51.5 |
| 11/8" | 40.3 | 59.2 | 24.7 | 32.4 | 52.5 | 72.4 |
| 11/4" | 54.3 | 78.6 | 36.1 | 45.8 | 70.6 | 95.5 |
| 13/8" | 73.0 | 102 | 47.9 | 59.3 | 94.5 | 125.0 |
| 11/2" | 94.3 | 131 | 60.9 | 74.8 | 122 | 161 |
| 15/8" | 162 | 91.6 | ||||
| 13/4" | 151 | 204 | 100 | 114 | ||
| 17/8" | 241 | 134 | ||||
| 2? | 224 | 299 | 140 | 165 | ||
| 21/4" | 419 | 227 | ||||
| 21/2" | 564 | 332 | ||||
| 23/4" | 738 | 429 | ||||
| 3? | 950 | 545 | ||||
| 31/4" | 1194 | 651 | ||||
| 31/2" | 1526 | 851 | ||||
| 33/4" | 1812 | 1005 | ||||
| 4? | 2180 | 1200 |
| Nominal Size or Basic Major Thread Diameter | F | G | H | ||||||
| Width Across Flats | Width Across Corners | Thickness | |||||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | ||
| 1/4 | .2500 | 1/2 | .500 | .488 | .577 | .556 | 15/64 | .250 | .218 |
| 5/16 | .3125 | 9/16 | .562 | .546 | .650 | .622 | 19/64 | .314 | .280 |
| 3/8 | .3750 | 11/16 | .688 | .669 | .794 | .763 | 23/64 | .377 | .341 |
| 7/16 | .4375 | 3/4 | .750 | .728 | .866 | .830 | 27/64 | .441 | .403 |
| 1/2 | .5000 | 7/8 | .875 | .850 | 1.010 | .969 | 31/64 | .504 | .464 |
| 9/16 | .5625 | 15/16 | .938 | .909 | 1.083 | 1.037 | 35/64 | .568 | .526 |
| 5/8 | .6250 | 1-1/16 | 1.062 | 1.031 | 1.227 | 1.175 | 39/64 | .631 | .587 |
| 3/4 | .7500 | 1-1/4 | 1.250 | 1.212 | 1.443 | 1.382 | 47/64 | .758 | .710 |
| 7/8 | .8750 | 1-7/16 | 1.438 | 1.394 | 1.660 | 1.589 | 55/64 | .885 | .833 |
| 1 | 1.0000 | 1-5/8 | 1.325 | 1.575 | 1.876 | 1.796 | 63/64 | 1.012 | .956 |
| 1-1/8 | 1.1250 | 1-13/16 | 1.812 | 1.756 | 2.093 | 2.002 | 1-7/64 | 1.139 | 1.079 |
| 1-1/4 | 1.2500 | 2 | 2.000 | 1.938 | 2.309 | 2.209 | 1-7/32 | 1.251 | 1.187 |
| 1-3/8 | 1.3750 | 2-3/16 | 2.188 | 2.119 | 2.526 | 2.416 | 1-11/32 | 1.378 | 1.310 |
| 1-1/2 | 1.5000 | 2-3/8 | 2.375 | 2.300 | 2.742 | 2.622 | 1-15/32 | 1.505 | 1.433 |
| 1-5/8 | 1.6250 | 2-9/16 | 2.562 | 2.481 | 2.959 | 2.828 | 1-19/32 | 1.632 | 1.556 |
| 1-3/4 | 1.7500 | 2-3/4 | 2.750 | 2.662 | 3.175 | 3.035 | 1-23/32 | 1.759 | 1.679 |
| 2 | 2.0000 | 3-1/8 | 3.125 | 3.025 | 3.608 | 3.449 | 1-31/32 | 2.013 | 1.925 |
| 2-1/4 | 2.2500 | 3-1/2 | 3.500 | 3.388 | 4.041 | 3.862 | 2-13/64 | 2.251 | 2.155 |
| 2-1/2 | 2.5000 | 3-7/8 | 3.875 | 3.750 | 4.474 | 4.275 | 2-29/64 | 2.505 | 2.401 |
| 2-3/4 | 2.7500 | 4-1/4 | 4.250 | 4.112 | 4.907 | 4.688 | 2-45/64 | 2.759 | 2.647 |
| 3 | 3.0000 | 4-5/8 | 4.625 | 4.475 | 5.340 | 5.102 | 2-61/64 | 3.013 | 2.893 |
| 3-1/4 | 3.2500 | 5 | 5.000 | 4.838 | 5.774 | 5.515 | 3-3/16 | 3.252 | 3.124 |
| 3-1/2 | 3.5000 | 5-3/8 | 5.375 | 5.200 | 6.207 | 5.928 | 3-7/16 | 3.506 | 3.370 |
| 3-3/4 | 3.7500 | 5-3/4 | 5.750 | 5.562 | 6.640 | 6.341 | 3-11/16 | 3.670 | 3.616 |
| 4 | 4.0000 | 6-1/8 | 6.125 | 5.925 | 7.073 | 6.755 | 3-15/16 | 4.014 | 3.862 |
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