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Double End Stud Chinese Factory
QS Fastener: Double End Stud Chinese Factory
Name: Double End Stud Chinese Factory
Standard: ASTM
Material: A193 B7
Size: 3/4 inch
Lenght: 100 mm
Surface: Black/ PTFE/ Zinc
Standard: ASTM
Material: A193 B7
Size: 3/4 inch
Lenght: 100 mm
Surface: Black/ PTFE/ Zinc
Quantity
When you specify a Double End Stud from a Chinese Factory, you are not ordering a commodity fastener—you are commissioning a precision-engineered component that has been heat-treated, tested, and certified to withstand the harshest industrial environments. The A193 B7 grade, with its Cr-Mo chemistry (equivalent to 42CrMoA or AISI 4140/4142), delivers tensile strength above 860 MPa and retains yield strength over 600 MPa even at 450 °C. This makes it the go-to choice for refinery reactors, supercritical steam valves, offshore riser clamps, chemical exchanger tube bundles, and even LNG cryogenic pumps, where impact toughness at –46 °C remains above 47 J.
What truly sets a Double End Stud apart is the controlled quench-and-temper process—re-tempered at no less than 593 °C—which balances hardness (≤35 HRC) with ductility, preventing stress-corrosion cracking and thermal fatigue under cyclic loading. Surface finishes such as black oxide, PTFE, or zinc plating all pass 1 000 h salt-spray tests, while EN 10204 3.1 certification comes standard. Sourcing from a Chinese Factory adds practical advantages: full-size lots ship within 72 hours, and custom modifications—left-hand threads, mixed metric/UNC dimensions, or cut-to-length stubs—are handled without delaying project schedules.
In real-world terms, this stud acts as a “seatbelt” for pressure-containing equipment. Replacing it with an ordinary bolt invites leakage, unplanned shutdowns, or catastrophic failure. Properly applied, it cuts total assembly cost, reduces diver interventions on offshore platforms, and extends maintenance intervals from months to years. The combination of material integrity, third-party traceability, and flexible production capacity makes the Double End Stud from a Chinese Factory a reliable, cost-effective solution for global energy and process industries—not because it is cheap, but because it performs predictably where failure is not an option.
FAQ
1. What is the maximum service temperature for an A193 B7 Double End Stud?
It can continuously operate at up to 500 °C, with yield strength still above 600 MPa at 450 °C, making it suitable for high-temperature pressure vessels and steam lines.
It can continuously operate at up to 500 °C, with yield strength still above 600 MPa at 450 °C, making it suitable for high-temperature pressure vessels and steam lines.
2. Can a B7 stud be used in low-temperature environments like LNG service?
Yes. Its impact toughness at –46 °C is ≥47 J, so it is widely used on LNG pump discharge flanges and cryogenic piping systems.
Yes. Its impact toughness at –46 °C is ≥47 J, so it is widely used on LNG pump discharge flanges and cryogenic piping systems.
3. What surface coatings are available, and how do they perform in corrosion tests?
Black oxide, PTFE, and zinc plating are offered; all pass 1 000 h salt-spray testing, with PTFE giving extra protection in marine and wet H₂S environments.
Black oxide, PTFE, and zinc plating are offered; all pass 1 000 h salt-spray testing, with PTFE giving extra protection in marine and wet H₂S environments.
4. How does sourcing from a Chinese Factory affect lead time and customization?
Full lots ship within 72 hours, and special requests—like left-hand threads, non-standard lengths, or mixed thread systems—can be accommodated without extra delays, helping projects meet tight schedules.
Full lots ship within 72 hours, and special requests—like left-hand threads, non-standard lengths, or mixed thread systems—can be accommodated without extra delays, helping projects meet tight schedules.
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