Nodularity Measurement Carbon in the form of graphite is often used as an additive in the production of cast iron, amounting to 2 to 4 percent by weight or 6 to 10 percent by volume in typical castings. The microstructure of graphite within cast iron significantly affects the mechanical properties of the casting. When graphite takes the form of thin flakes the result is flake cast iron, which is hard and brittle. When graphite arranges itself as spherical nodules the result is ductile cast iron, which is softer and more malleable than flake cast iron. The relative high strength and toughness of ductile cast iron provides advantages in many structural applications including automotive crankshafts, pistons and cylinder heads. Both flake cast and ductile cast iron are made by mixing carbon, silicon, and other additives into molten iron. Part of the mixing of elements is often done in the final mould. If the mixing is non-uniform or the casting process is not optimal, it is possible to make a casting with nodularity variations or with inclusions of flake cast iron present in the ductile cast iron. Since the type of result will significantly change the mechanical properties of the metal, foundries should check the uniformity of ductile cast iron. It is important to ensure that the distribution of graphite in the die casting is uniform and also that the graphite inclusions are present in the correct form: nodules rather than flakes. STEMart uses various methods to check the uniformity and form of the graphite in the die casting.

Nodularity Measurement Carbon in the form of graphite is often used as an additive in the production of cast iron, amounting to 2 to 4 percent by weight or 6 to 10 percent by volume in typical castings. The microstructure of graphite within cast iron significantly affects the mechanical properties of the casting. When graphite takes the form of thin flakes the result is flake cast iron, which is hard and brittle. When graphite arranges itself as spherical nodules the result is ductile cast iron, which is softer and more malleable than flake cast iron. The relative high strength and toughness of ductile cast iron provides advantages in many structural applications including automotive crankshafts, pistons and cylinder heads. Both flake cast and ductile cast iron are made by mixing carbon, silicon, and other additives into molten iron. Part of the mixing of elements is often done in the final mould. If the mixing is non-uniform or the casting process is not optimal, it is possible to make a casting with nodularity variations or with inclusions of flake cast iron present in the ductile cast iron. Since the type of result will significantly change the mechanical properties of the metal, foundries should check the uniformity of ductile cast iron. It is important to ensure that the distribution of graphite in the die casting is uniform and also that the graphite inclusions are present in the correct form: nodules rather than flakes. STEMart uses various methods to check the uniformity and form of the graphite in the die casting.

Mechanical properties testing is used to analyze the mechanical characteristics of materials applied with various external loads (such as tensile, compression, shear, torsion, impact, alternating stress, etc.) in different temperature, medium, and humidity. Mechanical properties testing can be applied to any stage of production, from quality control of raw materials to durability checking of finished products. STEMart provides a variety of mechanical properties testing to realize development of new materials, exploration of material potential and fault analysis of materials, help clients ensure the durability, stability and safety of materials.

Materials testing is used to understand how your materials will perform or react under a wide variety of stresses. Materials testing can also supply important information about the materials you are developing or incorporating into products to ensure they are in compliance with the expected specifications. The data collected during testing and the final test results can be very useful to engineers, designers, production managers and others. STEMart can conduct a large range of material analysis and characterization under standard guidelines and methods, and also provide custom testing according to clients' testing purposes and applications of the testing requirements.

Antimicrobial Efficacy Studies STEMart helps manufacturers quantitatively test the ability of their products to inhibit the growth of microorganisms or kill them. If you want to learn more detail about our service, or would like to consult with the experts at STEMart, please feel free to contact us.

STEMart provides comprehensive hydrostatic pressure test for products such as gowns, drapes, and barrier fabrics in accordance with AATCC 127, ISO 811, AAMI PB70, and EN 13795. Applicable Standards AATCC 127 Water Resistance: Hydrostatic Pressure Test AAMI PB70 Liquid Barrier Performance and Classification of Protective Apparel and Drapes Intended for Use in Health Care Facilities EN 13795 Requirements and Test Methods for Surgical Drapes and Gowns ISO 811 Textile Fabrics - Determination of Resistance to Water Penetration - Hydrostatic Pressure Test STEMart provides you with a thorough and accurate BFE and VFE tests that limit risk for your business and your customers. If you want to learn more detail about our service, or would like to consult with the experts at STEMart, please feel free to contact us.

Traditional safety assessment focuses on potential hazards from electrical, mechanical or other aspects of a design occurring during usage, while functional safety focusses on the reliability of the product to function safely and correctly in response to its inputs. As more and more software used in medical devices, the associated risk of physical injury or damage (hazard) to the health and well-being of patients and operators who using them is increasing. It is critically important to ensure the safety, security and reliability of software. STEMart provides functional safety testing to help manufacturer build safety into your medical device development process.

In order to verify the safety and functionality of medical device, manufacturers are required to perform electrical safety testing on their product according electrical safety standards. STEMart provides comprehensive electrical safety testing to help manufacturers evaluate the potential risks of electrical shocks to customers when using their medical devices.