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Jiaxing High Strength Bolt
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Product: Jiaxing High Strength Bolt
Dimension: 1-1/2 IN
Length: 400 mm
Material: ASTM A193 Gr.B16
Thread: 6 UNC
Feature: One Bolt with Two Nuts
Dimension: 1-1/2 IN
Length: 400 mm
Material: ASTM A193 Gr.B16
Thread: 6 UNC
Feature: One Bolt with Two Nuts
Quantity
As a senior fastener engineer, I can confirm that the High Strength Bolt you are evaluating is a critical component for high-temperature and high-pressure bolted connections. Manufactured in Jiaxing, this specific alloy steel stud bolt is precision-forged from ASTM A193 Gr.B16 – a chromium-molybdenum-vanadium alloy. Unlike standard B7 material, Grade B16 is specifically designed to retain its mechanical properties at elevated temperatures (up to 593°C / 1100°F) while offering superior resistance to hydrogen embrittlement and thermal relaxation, making it the preferred choice for severe service environments.
Precision Dimensions & Thread Fit
This High Strength Bolt features a nominal diameter of 1-1/2 inches with a 6 UNC (Unified Coarse) thread series. The coarse thread specification is deliberate; it minimizes the risk of galling during assembly and provides quicker make-up in field installations. With a total length of 400 mm, the bolt is engineered to accommodate the required nut and washer stack-up for flanged connections, ensuring full thread engagement as per ASME B18.2.1 standards.
This High Strength Bolt features a nominal diameter of 1-1/2 inches with a 6 UNC (Unified Coarse) thread series. The coarse thread specification is deliberate; it minimizes the risk of galling during assembly and provides quicker make-up in field installations. With a total length of 400 mm, the bolt is engineered to accommodate the required nut and washer stack-up for flanged connections, ensuring full thread engagement as per ASME B18.2.1 standards.
Configuration and Surface Treatment
The assembly is supplied as One Bolt with Two Nuts (a standard heavy hex configuration). This twin-nut setup allows for proper preload tensioning using torque or tensioning methods, and the second nut serves as a robust backup for mechanical locking. Please note that while your inquiry references a"zinc-plated yellow finish,"our standard Grade B16 offering typically utilizes a zinc phosphate or Xylan-coated finish to prevent hydrogen embrittlement. We recommend a coating system compliant with ASTM B633 or equivalent to maintain the bolt’s notch toughness.
The assembly is supplied as One Bolt with Two Nuts (a standard heavy hex configuration). This twin-nut setup allows for proper preload tensioning using torque or tensioning methods, and the second nut serves as a robust backup for mechanical locking. Please note that while your inquiry references a"zinc-plated yellow finish,"our standard Grade B16 offering typically utilizes a zinc phosphate or Xylan-coated finish to prevent hydrogen embrittlement. We recommend a coating system compliant with ASTM B633 or equivalent to maintain the bolt’s notch toughness.
Critical Application Scenarios
This Alloy Steel Bolt is indispensable in the Oil & Gas, Petrochemical, and Power Generation sectors. It is primarily utilized in:
This Alloy Steel Bolt is indispensable in the Oil & Gas, Petrochemical, and Power Generation sectors. It is primarily utilized in:
- Flange connections for Class 600 to Class 2500 piping systems.
- Valve bonnet bolts and pressure vessel manway covers.
- High-temperature steam lines and turbine casing studs where thermal cycling is a concern.
- Valve bonnet bolts and pressure vessel manway covers.
- High-temperature steam lines and turbine casing studs where thermal cycling is a concern.
Performance & Compliance
This product can be manufactured to meet the stringent requirements of API 20E BSL 2 (Bolting Specification for the Petroleum and Natural Gas Industries). This ensures that every lot undergoes strict hardness testing, tensile testing, and impact testing at -40°F to guarantee ductility. By choosing this High Strength Bolt, you are not just purchasing a fastener; you are investing in operational safety, extended maintenance intervals, and reliable joint integrity under the most demanding thermodynamic loads. For critical bolting, trust the metallurgical stability of ASTM A193 Gr.B16. Contact us for lot-specific MTRs and NDE reports.
This product can be manufactured to meet the stringent requirements of API 20E BSL 2 (Bolting Specification for the Petroleum and Natural Gas Industries). This ensures that every lot undergoes strict hardness testing, tensile testing, and impact testing at -40°F to guarantee ductility. By choosing this High Strength Bolt, you are not just purchasing a fastener; you are investing in operational safety, extended maintenance intervals, and reliable joint integrity under the most demanding thermodynamic loads. For critical bolting, trust the metallurgical stability of ASTM A193 Gr.B16. Contact us for lot-specific MTRs and NDE reports.
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