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Send InquiryASTM A193 Grade B8 Class 2 Hex Bolt
Price 110.0 INR/ Piece
MOQ : 100 Pieces
ASTM A193 Grade B8 Class 2 Hex Bolt Specification
- Drive Type
- Hex, Square, 12-Point (Flange), Slotted, Phillips, Allen, etc
- Thread Type
- Unified
- Corrosion Resistant
- Yes
- Surface Treatment
- Polishing
- Finish
- Buffed
- Grade
- 304
- Head Type
- Hex Head, Socket Head, Countersunk Head, T-Head etc
- Fasteners Type
- Bolts
- Material
- Stainless Steel
- Color
- Self Finish
About ASTM A193 Grade B8 Class 2 Hex Bolt
ASTM A193 Grade B8 Class 2 Hex Bolts are premium high-tensile, corrosion-resistant fasteners manufactured from strain-hardened AISI 304 austenitic stainless steel. They are explicitly designed for high-pressure, high-temperature, and severe chemical process environments including pressure vessels, valves, flanges, and piping systems.
Product Specification Breakdown
|
Property / Feature |
Technical Specifications |
|
Material Base |
AISI 304 Stainless Steel (18% Chromium, 8% Nickel) |
|
Manufacturing Class |
Class 2 (Carbide solution treated followed by severe strain hardening/cold working) |
|
Tensile Strength |
125 ksi minimum (up to 3/4" diameter); scales down to 100-115 ksi for larger sizes |
|
Yield Strength |
100 ksi minimum (up to 3/4" diameter) |
|
Maximum Hardness |
35 HRC max (321 HBW) |
|
Temperature Envelope |
Cryogenic up to service thresholds around 800F (425C) |
|
Standard Head Marking |
B8SH (The 'SH' or an underlined mark represents strain-hardened variant) |
|
Compatible Mating Component |
ASTM A194 Grade 8 Heavy Hex Nuts |
Key Product Features
- Elevated Tensile Performance: Unlike standard Class 1 bolts that only manage a baseline tensile rating of 75 ksi, Class 2 bolts leverage intense strain-hardening to deliver a robust 125 ksi tensile capacity.
- Severe Environment Longevity: The targeted addition of Chromium and Nickel guarantees reliable defense against atmospheric corrosion, localized pitting, and moisture degradation.
- Anti-Galling Homogeneity: Undergoes solution annealing temperatures between 1,100C to 1,200C to securely resolve chromium carbides within the crystal matrix.
Core Technical Applications
These heavy-duty fasteners are heavily utilized inside specialized heavy industries:
- High-pressure oil and gas piping connections.
- Chemical and petrochemical processing refineries.
- Marine offshore drilling platform equipment.
- Food and beverage manufacturing facilities.
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