GB/T 16825.1 is the Chinese national standard for calibrating and verifying the force-measuring system of static uniaxial tension and compression testing machines. It is the GB/T equivalent of the international force-verification method and is cited when Chinese compliance is required. To verify a machine to GB/T 16825.1 or specify one for the Chinese market, talk with our team.
What GB/T 16825.1 Verifies
A calibrated force-proving instrument is applied on the machine across its working range, and the difference between the reference force and the machine reading determines accuracy, repeatability, and resolution. The result places the force range in an accuracy class.
Machine Accuracy Classes
Verification assigns a class by permitted relative error, aligned with the international scheme:
| Class | Maximum permitted relative error |
|---|---|
| Class 0.5 | ±0.5% |
| Class 1 | ±1% |
| Class 2 | ±2% |
| Class 3 | ±3% |
Why the Class Matters
Chinese tensile and hardness methods reference a required machine class, so a valid GB/T 16825.1 certificate is what makes results defensible for domestic acceptance and audit. The verified class defines the force range available for accredited work.
Reading the Designation
Cited as GB/T 16825.1-YYYY. Confirm the edition before setting verification intervals and acceptance criteria.
Related Standards
ISO 7500-1 is the international counterpart for force-system verification, and ISO 376 calibrates the force-proving instruments used to perform it.
Request a Quote
Need a machine verified to GB/T 16825.1 or supplied for the Chinese market? Request a quote and our team will help you build a system matched to your force range and accuracy class.
TensileMill CNC products for GB/T 16825.1
Our specimen-preparation systems and testing equipment compatible with GB/T 16825.1:
Electro Mechanical Universal Testing System 5 kN / 50 kN with Precision Load Cell
Electro-Mechanical UTM · 5 kN / 50 kN with Precision Load Cell
Electro Mechanical Universal Testing System 50kN / 1000kN with Precision Load Cell
Electro-Mechanical UTM · 50 kN / 1000 kN with Precision Load Cell
Servo-Hydraulic Universal Testing Machine (300 kN – 3000 kN)
Servo-Hydraulic UTM · 300 kN – 3000 kN
Precision Alignment Device (NADCAP-Ready Precision Fixture)
NADCAP-Ready Precision Alignment Fixture
Equip your lab for GB/T 16825.1 with TensileMill CNC
Adding capacity or replacing older equipment? TensileMill CNC can support your GB/T 16825.1 program. Our range includes load cells, alignment hardware, and the reference setups used for machine and extensometer verification. Let us know your application and our engineers will help you build a compliant GB/T 16825.1 setup.