T/CSBM 0038-2023 Active Group standards

T/CSBM 0038-2023 Medical cobalt chrome alloy L605 with seamless welded tube for temperature processing

Publish Date: 2023-04-24 Implement Date: 2023-10-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CSBM 0038-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Surgical implants, prostheses, and orthoses

Publish Date: 2023-04-24

Implement Date: 2023-10-01

Scope

Main Technical Content: 4. Technical Requirements 4.1 Chemical Composition and Deviations 4.1.1 The chemical composition of medical cobalt-chromium alloy L605 shall comply with the requirements specified in Table 1. Table 1: Chemical Composition of Medical Cobalt-Chromium Alloy L605 4.1.2 When the buyer conducts reinspection, the allowable deviations in chemical composition shall comply with the provisions of ASTM F90. 4.2 Impurity Content The impurity content shall comply with the requirements of GB/T 30834–2020 for Grade 0.5. 4.3 Dimensions and Tolerances 4.3.1 The outer diameter, wall thickness, and length dimensions of the tube blank, as well as their allowable deviations, shall comply with the requirements specified in Table 2. Table 2: Diameter, Wall Thickness, and Length Dimensions of Tube Blanks and Their Allowable Deviations 4.3.2 The straightness of the tube blank shall not exceed 3 mm/m. 4.3.3 The edges of the tube blank shall be cut at right angles, without cracks, rolled edges, or burrs. 4.4 Room Temperature Mechanical Properties 4.4.1 The mechanical properties of seamless tubes in their as-cast and annealed states shall comply with the requirements specified in Table 3. Table 3: Room Temperature Mechanical Properties 4.4.2 The recommended heat treatment process for annealed seamless tubes is: heat at 1050–1150°C for 0.5–2.0 hours, then air-cool. The supplier may adjust the heat treatment process as needed. 4.5 Microstructure and Grain Size 4.5.1 The low magnification microstructure of seamless tubes shall not contain defects such as cracks, delamination, pores, or shrinkage tail that disrupt metal continuity. 4.5.2 The grain size of seamless tubes shall not be lower than Grade 9, with uniform grain size. Other requirements shall comply with GB/T 6394. 4.6 Surface Quality 4.6.1 The surface of the tube shall be smooth and clean, without cracks, pinholes, peeling, bubbles, delamination, or various embedded ob