Sucker rod sub couplings SM SH FS Coupling  

3/4" 7/8" 1" T Sucker Rod Coupling SM SH FS Coupling Product Description Manufacturing specification: API 11B Material 1. Chemical Composition The material shall be per manufacturer’s specification and shall have a maximum sulfur content of 0.05%. 2. Mechanical Properties Mechanical properties shall be in accordance with the manufacturer’s specification with a minimum tensile strength of 95,000psi(655MPa). One of the following means shall be used to conform to the tensile requirements: ---determination of the metal material hardness of 56 to 62 HRA inclusive; or ---material test report per 6.3.2.2 for the heat of steel from the original mill if further processing does not change mechanical properties; or ---a tensile test per ASTM A370, OR ISO 6892 with s minimum of two tests performed after final thermal Specification Type Grade…