RapidBoltEngineering Reference
Technical Data
Verified engineering specifications for industrial fasteners. All data sourced from ASTM, ASME B16.5, and manufacturer technical documentation.
ASTM A193/A320 Material Properties
Mechanical properties per ASTM A193/A193M and A320/A320M specifications. Values shown are for sizes up to 2.5 in (M64) unless otherwise noted.
| Grade | Material | Tensile Min | Yield Min | Elong. | Hardness Max |
|---|---|---|---|---|---|
| A193 B7 | Chromium-Molybdenum Steel (AISI 4140/4142) | 125 ksi (860 MPa) | 105 ksi (720 MPa) | 16% | 35 HRC (321 HBW) |
| A193 B7M | Chromium-Molybdenum Steel (AISI 4140/4142) | 100 ksi (690 MPa) | 80 ksi (550 MPa) | 18% | 22 HRC (235 HBW) |
| A193 B5 | 5% Chromium Steel (501/502) | 100 ksi (690 MPa) | 80 ksi (550 MPa) | 16% | 22 HRC (235 HBW) |
| A193 B6 | 410 Stainless Steel (13Cr) | 110 ksi (760 MPa) | 85 ksi (585 MPa) | 15% | 24 HRC (248 HBW) |
| A193 B8 | 304 Stainless Steel (18Cr-8Ni) | 75 ksi (515 MPa) | 30 ksi (205 MPa) | 30% | 223 HBW |
| A193 B8M | 316 Stainless Steel (18Cr-10Ni-2Mo) | 75 ksi (515 MPa) | 30 ksi (205 MPa) | 30% | 223 HBW |
| A193 B8T | 321 Stainless Steel (18Cr-10Ni-Ti) | 75 ksi (515 MPa) | 30 ksi (205 MPa) | 30% | 223 HBW |
| A193 B8C | 347 Stainless Steel (18Cr-10Ni-Cb) | 75 ksi (515 MPa) | 30 ksi (205 MPa) | 30% | 223 HBW |
| A193 B16 | Chromium-Molybdenum-Vanadium Steel | 125 ksi (860 MPa) | 105 ksi (720 MPa) | 18% | 35 HRC (321 HBW) |
| A320 L7 | Chromium-Molybdenum Steel (AISI 4140/4142) | 125 ksi (860 MPa) | 105 ksi (720 MPa) | 16% | 35 HRC (321 HBW) |
| A320 L7M | Chromium-Molybdenum Steel (AISI 4140/4142) | 100 ksi (690 MPa) | 80 ksi (550 MPa) | 18% | 22 HRC (235 HBW) |
| A320 L43 | Nickel-Chromium-Molybdenum Steel (AISI 4340) | 125 ksi (860 MPa) | 105 ksi (720 MPa) | 16% | 35 HRC (321 HBW) |
| A325 | Medium Carbon Steel, Quenched & Tempered | 120 ksi (830 MPa) | 92 ksi (635 MPa) | 14% | 34 HRC (310 HBW) |
| Grade 8.8 | Medium Carbon Steel, Quenched & Tempered | 116 ksi (800 MPa) | 92 ksi (640 MPa) | 12% | 302 HBW |
| Grade 10.9 | Alloy Steel, Quenched & Tempered | 150 ksi (1040 MPa) | 130 ksi (900 MPa) | 9% | 353 HBW |
| Grade 12.9 | Alloy Steel, Quenched & Tempered | 174 ksi (1200 MPa) | 156 ksi (1080 MPa) | 8% | 390 HBW |
| Duplex 2205 (F51) | 22Cr Duplex Stainless Steel (UNS S31803) | 90 ksi (620 MPa) | 65 ksi (450 MPa) | 25% | 293 HBW |
| Super Duplex 2507 (F53) | 25Cr Super Duplex Stainless Steel (UNS S32750) | 116 ksi (795 MPa) | 80 ksi (550 MPa) | 15% | 310 HBW |
| Inconel 625 | Nickel-Chromium-Molybdenum Alloy (UNS N06625) | 120 ksi (827 MPa) | 60 ksi (414 MPa) | 30% | — |
| Inconel 718 | Nickel-Chromium Precipitation-Hardened Alloy (UNS N07718) | 180 ksi (1240 MPa) | 150 ksi (1034 MPa) | 12% | 40 HRC |
| Monel 400 | Nickel-Copper Alloy (UNS N04400) | 70 ksi (480 MPa) | 28 ksi (195 MPa) | 35% | — |
| Monel K-500 | Nickel-Copper Precipitation-Hardened Alloy (UNS N05500) | 140 ksi (965 MPa) | 100 ksi (690 MPa) | 20% | 35 HRC |
| Incoloy 825 | Nickel-Iron-Chromium-Molybdenum Alloy (UNS N08825) | 85 ksi (586 MPa) | 35 ksi (241 MPa) | 30% | — |
| Hastelloy C-276 | Nickel-Molybdenum-Chromium Alloy (UNS N10276) | 100 ksi (690 MPa) | 41 ksi (283 MPa) | 40% | — |
| A453 660 Class A | A-286 Iron-Nickel-Chromium Alloy (UNS S66286) | 130 ksi (896 MPa) | 85 ksi (586 MPa) | 15% | 302 HBW |
| A453 660 Class B | A-286 Iron-Nickel-Chromium Alloy (UNS S66286) | 115 ksi (793 MPa) | 75 ksi (517 MPa) | 15% | 277 HBW |
| A453 660 Class C | A-286 Iron-Nickel-Chromium Alloy (UNS S66286) | 100 ksi (690 MPa) | 60 ksi (414 MPa) | 18% | 248 HBW |
| A453 660 Class D | A-286 Iron-Nickel-Chromium Alloy (UNS S66286) | 85 ksi (586 MPa) | 40 ksi (276 MPa) | 25% | 223 HBW |
| Durehete 1055 | 1CrMoV Steel (BS 1506-621A) | 116 ksi (800 MPa) | 93 ksi (640 MPa) | 15% | 302 HBW |
| Durehete 950 | Low Alloy Cr-Mo Steel | 87 ksi (600 MPa) | 58 ksi (400 MPa) | 18% | 248 HBW |
Source: ASTM A193/A193M-22 and ASTM A320/A320M-22 Standard Specifications
Bolt & Nut Pairing Guide
Standard nut grades per ASTM A194/A194M for use with A193/A320 bolts.
| Bolt Grade | Recommended Nut | Nut Material |
|---|---|---|
| A193 B7 | A194 2H | Carbon Steel, Quenched & Tempered |
| A193 B7M | A194 2HM | Carbon Steel, NACE MR0175 Compliant |
| A193 B5 | A194 3 | 5% Chromium Steel |
| A193 B6 | A194 6 | 410 Stainless Steel (Martensitic) |
| A193 B8 | A194 8 | 304 Stainless Steel |
| A193 B8M | A194 8M | 316 Stainless Steel |
| A193 B8T | A194 8T | 321 Stainless Steel (Ti Stabilised) |
| A193 B8C | A194 8C | 347 Stainless Steel (Cb Stabilised) |
| A193 B16 | A194 4/7 | Alloy Steel for High Temperature |
| A320 L7 | A194 4/7 | Alloy Steel for Low Temperature |
| A320 L7M | A194 7M | Alloy Steel, NACE MR0175 Compliant |
| A320 L43 | A194 4/7 | Ni-Cr-Mo Steel for Low Temperature |
| Duplex 2205 | Duplex 2205 Nut | 22Cr Duplex Stainless Steel |
| Super Duplex 2507 | Super Duplex Nut | 25Cr Super Duplex Stainless Steel |
| Inconel 625 | Inconel 625 Nut | Nickel-Chromium-Molybdenum Alloy |
| Inconel 718 | Inconel 718 Nut | Nickel-Chromium Precipitation-Hardened |
| Monel 400 | Monel 400 Nut | Nickel-Copper Alloy |
| Monel K-500 | Monel K-500 Nut | Nickel-Copper Precipitation-Hardened |
| Incoloy 825 | Incoloy 825 Nut | Nickel-Iron-Chromium-Molybdenum |
| Hastelloy C-276 | Hastelloy C-276 Nut | Nickel-Molybdenum-Chromium |
| A453 660 | A453 660 Nut | A-286 Iron-Nickel-Chromium |
| Durehete 1055 | Durehete 950 | 1CrMoV Steel / Low Alloy Cr-Mo |
Source: ASTM A194/A194M-22 Standard Specification for Carbon and Alloy Steel Nuts
Disclaimer: This technical data is provided for reference purposes only. Always verify specifications against current ASTM, ASME, and API standards. EMG Precision provides EN 10204 3.1 certification for all supplied materials.