Testing materials for oil and gas NPL helped develop a 4-point bend test tailored to the needs of the oil and gas industry. This will enable the reliable evaluation of materials used for extracting and transporting oil from wells. Background The oil and gas industry identified the need for a way of reliably and reproducibly testing the corrosion resistant alloys used for tubulars and flow lines in extracting and transferring oil from oil wells. The water/oil mixture in the pipes contains aggressive corrosive chemicals including dissolved hydrogen sulphide and carbon dioxide at high pressure and temperature. The combination of physical and chemical conditions in oil and gas extraction can lead to very challenging environments for materials and the possibility of cracking and fracture of the

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