Quality
The part is made entirely from high-strength re-rolled carbon steel — or “iron”, as it is popularly known. It is the most widely used combination and covers almost all applications without specific corrosion or mechanical requirements. Used in mildly aggressive environments.
Components are made of stainless steel, except the screw, which is carbon steel and receives a carburizing treatment to increase hardness. Used when higher mechanical strength — higher torque — is required. Widely applied in automotive uses.
The most premium option. Combines high torque with corrosion resistance. Suitable for highly aggressive environments such as ships, boats, refineries, and also food industries, ensuring excellent hygiene.
Our products are periodically submitted to several levels of testing. For further detail, we highlight some of them below:
This test accelerates corrosion so resistance can be measured. The part is placed in a chamber with heated salt water vapor and must withstand a set time without white corrosion (zinc layer) or red corrosion (base metal — the clamp itself). A 24-hour salt-spray rating means the zinc layer should not corrode after 24 hours in the chamber.
Our lab runs conventional salt-fog tests and cyclic corrosion tests required by the automotive industry to better simulate real adverse conditions (salt fog, rain, condensation, wet/dry cycles and temperature swings). Salt-spray follows ASTM B117 or NBR 8094; cyclic tests cover VW PV1210, FORD CETP: 00.00-L-467, SCANIA STD4319 and GMW14872.
For large parts we use a coordinate measuring machine (CMM), which delivers high precision and versatility.
Many tests and procedures are mentioned for Suprens — how can you be sure they are run consistently and correctly, and that we meet automotive industry requirements, the most demanding in the market? The answer lies in our certificates.
For more critical applications, measuring clamp torque alone is not enough to assess real effectiveness.
We apply torque to the part and measure the resulting radial force — useful to check whether the force applied to the screw or nut is actually transferred to the hose.
This is the most rigorous test. The part is subjected to the same conditions as a running engine, under extreme conditions.
