What is Stress and Strain Curve?

Relevant specifications BS EN 10002 Methods of tensile testing of metallic materials.BS EN 876 Destructive tests on welds in metallic materials – longitudinal tensile test.BS EN 895 Destructive tests on welds in metallic materials – transverse tensile test.BS EN ISO 7500-1 Tension/compression testing machines. verification and calibration of the force measuring system.ASTM A370 Mechanical testing of steel products.ASTM E8 Tension testing of metallic materials.ASTM B557 Tension testing wrought and cast aluminum and magnesium alloy products. In engineering and materials science, a stress–strain curve for a material which showing the relationship between stress and strain of a material section subjected to … Continue reading What is Stress and Strain Curve?

Why WPS need to be qualified?

If you own or work at a job shop you may have noticed an increase in the number of customers that require the use of qualified welding procedures to build their products. Some fabricators are even getting this request from long time customers who never required them in the past. So why is this? The purpose of having a welding procedure specification (WPS) is to give the welder detailed instructions on how to make a weld.  These instructions consist of parameters that need to be used such as amperage, voltage, travel speed, transverse and travel angles, gas flow rate, etc. … Continue reading Why WPS need to be qualified?

API 570 Quiz (ASME 31.3 – Pressure Testing)

If you don’t know how API 570 Certification scheme, See API 570 Certification Instruction PRESSURE TESTINGThe inspector should be able to:a) Demonstrate knowledge concerning hydrostatic leak testing (ASME B31.3 Section 345.4)b) Demonstrate knowledge concerning pneumatic leak testing (ASME B31.3 Section 345.5)c) … Continue reading API 570 Quiz (ASME 31.3 – Pressure Testing)