RapidBoltWater & chemical plant
General corrosive service where carbon steel bolting would corrode.
Austenitic stainless steel (304)
ASTM A193 B8 Class 2 Stud Bolts
Strain-hardened 304 stainless B8 Class 2 stud bolts for corrosive flanges that need more strength than Class 1, quoted buy-to-order with 3.1 certificates.
BUY-TO-ORDER SUPPLYLEAD TIME QUOTED PER RFQEN 10204 3.1 / 3.2 RECORDS
GRADE OVERVIEW
B8 Class 2 stud bolts, specified correctly.
Class 2 studs are carbide-solution treated and then strain hardened, giving higher strength than Class 1 (solution treated) B8 while keeping 304 stainless corrosion resistance.
Strength in Class 2 varies by diameter, so larger sizes carry lower minimum properties. Confirm the size-specific requirement and whether the strain-hardened condition suits your service.
View the material reference- GRADE
- ASTM A193 Grade B8 Class 2
- UNS / TYPE
- UNS S30400
- MATCHED NUT
- ASTM A194 Grade 8 / 8A
- SIZES
- 1/4"–6" · M5–M150
Reference information only. Your specification and the supplied certificates govern; no stock or equivalence is implied.
WHERE IT IS SPECIFIED
Typical applications
Food & process
Stainless flanges and equipment requiring 304 compatibility.
Mining reagents
Process piping exposed to reagents and wash-down conditions.
WHAT TO PUT ON YOUR RFQ
Quoted right the first time.
01
Size & length
Diameter from 1/4" to 6" or M5 to M150, thread form (UNC/8UN or metric), and length measured per ASME B16.5 / B16.47 or your drawing for B8 Class 2.
02
Nuts, washers & coating
Specify matched heavy hex nuts, through-hardened washers and any coating, such as Xylan/PTFE, so the kit is quoted as one traceable package.
03
Records & inspection
State EN 10204 3.1 or 3.2, PMI, hardness or impact testing and any project ITP so certificates are confirmed before order.
QUESTIONS
B8 Class 2 FAQs
REQUEST A QUOTE
Send your B8 Class 2 requirement.
Send sizes, quantities, nuts, coating, certificates and required date, or attach a line list or drawing. EMG confirms sourcing, records and lead time against your RFQ.
Sizes & lengths
Diameter, thread, length and quantity per line.
Grade & nuts
ASTM A193 Grade B8 Class 2 with ASTM A194 Grade 8 / 8A.
Records
EN 10204 3.1 / 3.2, PMI and testing as specified.