Quality Control & Material Testing
In-house material analysis and dimensional inspection on every batch: chemistry, hardness, structure and final size verification.
A bearing part's life is decided by material and measurement. We keep both under internal control — chemical composition of each melt is analyzed in our in-house laboratory, and every finished part is dimensionally checked against the drawing before it is packed.
Where you require it — typically for mining and OEM-replacement orders — we provide material certificates documenting composition against the alloy standard.
Inspection covers chemistry, hardness, internal soundness, and final dimensions on critical features such as bores, keys and seats. Parts that do not conform do not ship; that is a policy, not a promise.
Reference standards. Parts are cast and tested against the standards that apply to the order — JIS H 5120 / H 5121, GB/T 1176, ASTM B271, ASTM B584, ASTM B505, ASTM B824, JB/T 5000.15, YS/T 465, YS/T 668, YS/T 347, YS/T 585, GB/T 228.1, GB/T 231.1, GB/T 8063, GB/T 5231.
In-house testing. Spectrometer analysis at the furnace and on finished parts; tensile and compressive testing; metallographic examination; Brinell hardness testing; ultrasonic and dye-penetrant flaw detection; dimensional inspection with micrometer and gantry CMM.
Wear and cavitation verification. Bushing wear is verified on a reciprocating rig (CSB-40 / CSB-50 / CSB-50MP; 0.5 m/s, 1 m stroke, 14.5 MPa, 46# hydraulic oil, 500,000 cycles). Marine grades are checked in a seawater cavitation test (e.g. ZCuAl9Fe4Ni4Mn2 aluminium bronze).