DIN EN ISO 9809-2 : 2020 Title: Gas cylinders - Design, construction and testing of refillable seamless steel gas cylinders and tubes - Part 2: Quenched and tempered steel cylinders and tubes with tensile strength greater than or equal to 1100 MPa (ISO 9809-2:2019) Year: 2020 Publisher: DIN Media GmbH Availability: Within 1-2 working days