Product details
Silica sol investment casting C45 carbon steel with MT inspection to avoid porosity and crack on threaded boss stress area
CNC drilling tapping milling with CMM inspection ensures threaded hole and mounting surface for reliable bolt connection
Quench and temper heat treatment delivers high tensile and shear strength for heavy load machinery application
Shot blasting plus galvanized surface provides excellent anti rust performance for outdoor working condition
Spectrometer material verification with MTR report to guarantee C45 carbon steel mechanical performance
Corresponding Customer Complaint and Solutions
1. Porosity and crack on threaded boss cause fracture under shear tension: Silica sol investment casting plus MT 100 percent inspection on critical boss area
2. Thread dimension deviation leads to thread stripping or hard assembly: CNC finish machining with CMM inspection tolerance ±0.04mm
3. Poor tensile shear performance from insufficient heat treatment: Quench and temper heat treatment with heat treatment report available
4. Casting deformation causes poor mounting fit: Casting straightening plus CNC face milling to control geometric tolerance
5. Unqualified material composition leads to failure under long term load: Spectrometer test with MTR report for every production batch




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Step 1
Payment and order readiness
Minimum order: 500 Units
Payment terms, specifications, and order details are confirmed before preparation begins.
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Step 2
Preparation
40 days
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Step 3
Packaging and dispatch
Ocean freight via Maersk · Approx. shipping fee: $ 0.84 for 1 unit · Transit time: Est. 17-24 days
Final packing, freight, and delivery dates are confirmed before dispatch.
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