GB/T 6803-2023
Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels (English Version)
- Standard No.
- GB/T 6803-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 6803-2023
- Replace
- GB/T 6803-2008
- Introduction
GB/T 6803-2023 Standard Overview
This standard specifies the drop weight test method for the non-ductile transition temperature (NDT) of ferritic steel, and is applicable to plates, profiles, cast steel and forged steel products with a thickness of not less than 12mm.
Comparison table of standard frameworks
Chapter content GB/T 6803-2008 GB/T 6803-2023 Test principle Determination of NDT temperature by drop weight impact method Updated to more accurate energy control method Specimen size requirements Unified P-1 and P-2 models Added P-3 model to adapt to thinner materials Test equipment calibration No clear requirements Added JJF 1445 calibration specification Technical principles and application cases
Non-ductile transition temperature (NDT) is an important performance indicator of ferritic steel, which reflects the change in toughness of the material at different temperatures.
Through the drop hammer test, a fixed deflection impact energy is applied to observe whether the specimen breaks. For example, in bridge steel structures, choosing the right NDT temperature is crucial to ensuring the safety of welded joints.
Implementation recommendations
- Strictly follow the standard requirements for specimen preparation and equipment calibration to ensure the accuracy of test data.
- It is recommended to use automated welding equipment to weld the crack source weld to reduce human errors.
- In actual applications, other non-destructive testing methods (such as ultrasonic testing) are combined for comprehensive evaluation.
GB/T 6803-2023 Referenced Document
- GB/T 2975 Steel and steel products.Location and preparation of samples and test pieces for mechanical testing
- GB/T 984 Hardfacing electrodes for shielded metal arc welding
- JJF 1445 Calibration Specification for Falling Weight Impact Testing Machines
GB/T 6803-2023 history
- 2023 GB/T 6803-2023 Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels
- 2008 GB/T 6803-2008 Test method for drop-weight test to determine nil-ductility transition temperature of ferritic steels
- 1986 GB/T 6803-1986 Standard method for conducting drop weight test to determine nil ductility transition temperature of ferritic steels
