The required minimum yield strength for l485m steel pipe is 70300 psi or 485 Mpa while the minimum tensile strength is around 92100 psi or 635 Mpa. X70 Lsaw Analysis and estimation of the yield strength of API X70 In this study, effects of microstructure and pipe-forming strain (thickness/diameter (t/D)) on yield strength variation were investigated in X70 (483 MPa) and X80 (552 MPa) linepipe steels
Specification. Seamless Steel Pipe. Process:Seamless Steel Pipe (SMLS STEEL PIPE) Standard:API 5L, API 5CT, ASTM A106/A53, ASTM A519, JIS G 3441, JIS G3444, JIS ERW Standard and Line Pipe Grades - Continental Steel Grade A Carbon Steel (ASTM A53, A523, API 5L PSL1 ) Minimum Yield Strength:30,000 psi Maximum Yield Strength:None Minimum Tensile Strength:48,000 psi Notes:This grade may be used for standard pipe, line pipe, or conduit pipeas specified in the various ASTM and API specifications. Grade B Carbon Steel (ASTM A53, A523, API  Effects of Heat Treatment Process on Mechanical Properties Effects of heat treatment process of quenching and tempering under different temperature conditions on mechanical properties of X70 grade pipeline steel bends were studied. Brinell hardness, yield strength, tensile strength, elongation and impact absorbing energy of the bends were tested by using hardness tester, cupping machine and impact testing machine, respectively.
HSLA steels are available today with traditional ferritic-pearlitic, bainitic, martensitic and multiphase microstructures, each available in hot- or cold-rolled steels. The yield strength of contemporary HSLA steels ranges from 260 MPa to over 1000 MPa. Typically, Mo is used in HSLA steel when the yield strength must be above 550 MPa, or a High Yield Seamless Carbon Steel Pipe - Worldwide PipeYield Strength. Tensile Strength Yield to Tensile Elongation min. (KSI) min. (KSI) Ratio Key Factors of Stress Corrosion Cracking of X70 pipeline X70 steel and suggested that plastic deformation promoted cathodic reaction and hydrogen absorption and ingress into the steel and thus accelerated the SCC risk of X70 steel. Further, Ren  pointed out and n are the yield strength, hardening coefficient, and hardening index, respectively. Figure 2.
Jun 28, 2019 · An API X70 grade line-pipe steel sheet [chemical composition:0.06C-1.6Mn (wt%)] with a minimum yield strength of 70 ksi (482 MPa) was used in this study. Mechanical Properties of High-Nb X80 Steel Weld Pipes for Sep 07, 2017 · The mechanical properties of steel pipe have great effects on the integrality and operation safety of gas transmission pipeline. In order to reduce the cost of the steel pipe, the high-Nb X80 pipeline steels with the different alloying systems have been used in the Second West-to-East Gas Transmission Pipeline Project. Nevertheless, an investigation into the effects of chemical composition Microstructure and Properties of Low Manganese API X70 Precipitates were characterized in terms of morphology, size and chemistry. Higher yield strength levels up to 545MPa and tensile strength levels up to 640 MPa were achieved while excellent low-temperature toughness was obtained. The steel also exhibits high hydrogen induced cracking (HIC) resistance.
2. Development of Steel API X70 seamless pipes, the strongest line pipes available, are made of steel containing approximately 0.1% C, from 1 to 1.75% Mn, and alloying elements, such as Cr, Mo, Ni, and Cu, by small amounts (the percentages of component elements are in mass), and having a carbon equivalent of 0.42 or less according to the Ceq for- Yield strength estimation of X65 and X70 steel pipe with In this study, a combined hardening model is proposed to effectively predict variations of yield strength in the circumferential direction of API X65 and X70 steel pipes with relatively low t/D Yield strength estimation of X65 and X70 steel pipe with In this study, a combined hardening model is proposed to effectively predict variations of yield strength in the circumferential direction of API-X65 and X70 steel pipes with relatively low t/D ratio during the forming process, which is expected to experience accumulated plastic strain of 2~3%, the typical Lüder band range in a low-carbon steel.
6 rows · Yield strength a Tensile strength a Ratio Elongationa, c Tensileand COW strength pipes d