347S31, BS2338, 1.4550, 347, S34700, X6CrNiNb18-10
A320 Grade B8C Stud Bolts are manufactured from 347 Stainless Steel in accordance with ASTM A320 specification. Torqbolt is a prominent A320 gr B8C Stud bolt supplier in India.
SS 347 Bolts 347 Stainless Steel Bolts And Nuts 347 Stainless Steel Forgings 347 SS Nuts 347 Stainless Steel Screws 347 Stainless Steel Stud Bolts SS 347 Washers Astm A193 Grade B8C Bolts Astm A193 Grade B8Ca Bolts Astm A194 Gr. 8C Nuts A194 Grade 8Ca Nuts Astm A320 Grade B8C Class 1 Bolts Astm A320 Grade B8Ca Bolts 1.4550 Stud 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 B8C | S34700(347) | Range,% | 0.08 | 2.00 | 0.045 | 0.030 |
1.00 | 9.0- 12.0 | 17.0- 19.0 | ... | ... | ... | ... | 10 × C content, min -1.10 max |
Product Variation, % Over or Under | 0.01 over | 0.04 over | 0.010 over | 0.005 over | 0.05 over | 0.15 | 0.20 | ... | ... | ... | ... | 0.05 under |
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 B8C Class 1 | All diameters | carbide solution treated | ... | 75 [515] | 30 [205] | 30 | 50 | 223 HBWDor 96 HRB |
ASTM A320 B8C 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 |