1.4303, 305, S30500, X4CRNI18-12
ASTM A320 Grade B8P Bolts are manufactured from 305 Stainless Steel in accordance with ASTM A320 specification. Torqbolt is a prominent A320 gr B8P bolt supplier in India.
Astm A193 Grade B8P Studs Astm A193 Grade B8Pa Bolts Astm A194 Grade 8P Nuts Astm A194 Grade 8Pa Nuts Astm A320 Grade B8P Studs Astm A320 Grade B8Pa Bolts
| Grade Symbol | UNS Designation | C, max | Mn, max | P, max | S, max | Si, max | Ni | Cr | Mo | Se | Ti | N | Nb E + Ta | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A320 B8P | S 30500 | Range,% | 0.12 | 2.00 | 0.045 | 0.030, max | 1.00 | 11- 13.0 | 17.0- 19.0 | ... | ... | ... | ... | ... |
| Product Variation, % Over or Under | 0.01 over | 0.04 over | 0.010 over | 0.005 over | 0.05 over | 0.15 | 0.20 | ... | ... | ... | ... | ... | ||
| Grade and Class | Diameter, in. [mm] | Heat Treatment | Minimum Tempering Temperature, °F [°C] | Tensile Strength, min, ksi [MPa] | Yield Strength, min, ksi [MPa] (0.2 % offset) | Elongation in 2 in. or 50 mm, min, % | Reduction of Area, min, % | Hardness, max |
|---|---|---|---|---|---|---|---|---|
| ASTM A320 B8P : Class 1 | All diameters | carbide solution treated | ... | 75 [515] | 30 [205] | 30 | 50 | 223 HBWDor 96 HRB |
| ASTM A320 B8P : Class 2 | 3/4 [20] and under | carbide solution treated and strain hardened | ... | 125 [860] | 100 [690] | 12 | 35 | 321 HBW or 35 HRC |
| over 3/4 to 1 [20 to 25], incl | ... | 115 [795] | 80 [550] | 15 | 30 | 321 HBW or 35 HRC | ||
| over 1 to 11/4 [25 to 32], incl | ... | 105 [725] | 65 [450] | 20 | 35 | 321 HBW or 35 HRC | ||
| over 11/4 to 11/2 [32 to 40], inclA | ... | 100 [690] | 50 [345] | 28 | 45 | 321 HBW or 35 HRC |