300 / 600 / 1000 kN WAW-B Series Computerized Hydraulic Universal Testing Machine for Steel Rebar
Hydraulic Universal Testing Machines
Overview
The WAW-B series is a computerized hydraulic universal testing machine offered in 300 kN, 600 kN and 1000 kN capacities for tensile, compression and bending tests. It adopts microcomputer control with a digital broadband and a digital-valve driven precision hydraulic cylinder, and the test force, displacement and deformation can be run under a number of automatic control modes. It is designed around the tensile test of metallic materials and is widely used for steel bar and steel rebar testing, where the machine must complete tensile, compression and bending tests in one frame.
The main frame uses a hydraulic cylinder underneath the crosshead, so the power and transmission unit sits at the bottom of the machine and the test space stays clear. The upper and lower jaws have a full-open structure with an automatic hydraulic clamping system, which makes specimens easy to load and gives stable gripping. A brand-name computer is supplied for parameter setting, process control, data acquisition, processing, analysis, storage and display, so the operator works from a normal Windows interface rather than from a dedicated console.
Technical Specifications
| Parameter | Value |
|---|---|
| Model series | WAW-B computerized hydraulic universal testing machine |
| Capacities | 300 kN / 600 kN / 1000 kN |
| Test types | Tensile, compression and bending |
| Main frame | Hydraulic cylinder underneath type; power and transmission unit mounted at the base |
| Jaws | Upper and lower jaws with full-open structure and automatic hydraulic clamping |
| Applicable standard | GB/T 228.1-2010 “Metallic materials — Tensile testing at room temperature” and other requirements |
| Control | Microcomputer control digital broadband; digital valve driven precision hydraulic cylinder |
| Load control | PID control, constant-rate, speed range 0.2 to 5 % FS/s, with load-holding function |
| Displacement control | PID control, constant-rate, speed range 0.6 to 60 mm/min, with displacement function |
| Strain control | PID control, constant-rate, speed range 0.00025 /s to 0.0025 /s, with strain-holding function |
| Test force resolution | 1/350000 |
| Converter | 24-bit high-precision AD converter, efficient code ±300000 |
| Computer | Brand computer (Lenovo), Windows control and analysis software |
| Reported data | Tensile strength, elastic modulus, elongation, yield strength and extension strength, with curves and test reports |
| Applications | Steel bar, steel rebar and similar metallic specimens |
What the WAW-B machine measures
The test force, displacement and deformation channels each have their own automatic control mode, so the machine can run a test in load control, in displacement control or in strain control as the method requires. That is what allows one frame to carry out a tensile test to GB/T 228.1-2010 and then, with the correct fixtures, a compression or a bending test. The reported results include the material tensile strength, elastic modulus, elongation, yield strength and extension strength, and the software displays and stores the test curve together with the calculated values.
Control and measuring system
The measuring system uses a 24-bit high-precision AD converter with an efficient code of about ±300000 and a test force resolution of 1/350000. Load, displacement and strain are each closed under PID control at a constant rate, so the test is repeatable: load from 0.2 to 5 % FS/s, displacement from 0.6 to 60 mm/min, and strain from 0.00025 /s to 0.0025 /s, each with a holding function. Precise control of the rates is what makes the yield point and the elastic modulus reproducible from one operator to the next.
Why steel rebar testing suits a hydraulic frame
Steel bar and steel rebar are tested in tension, and the specimen is stiff and often of large diameter, so a hydraulic frame with a cylinder underneath the crosshead and automatic hydraulic clamping jaws is used to grip and pull the specimen with the required force. The bottom-mounted power unit keeps the machine stable under load, and the full-open jaw design makes it quick to load a bar and to remove it after fracture. Together with the capacity matched to the bar size, the WAW-B series covers the rebar and bar testing carried out in a steel mill, a rolling mill or a construction materials laboratory.
Frequently Asked Questions
What capacities are available in the WAW-B series?
The series is offered in 300 kN, 600 kN and 1000 kN capacities, covering tensile, compression and bending tests on steel bar and steel rebar.
Which standard does the machine follow?
It is designed for the tensile test and accords with the national standard GB/T 228.1-2010, Metallic materials — Tensile testing at room temperature, as well as other requirements.
What control modes does it provide?
Load, displacement and strain each use PID control at a constant rate: load from 0.2 to 5 % FS/s, displacement from 0.6 to 60 mm/min and strain from 0.00025 /s to 0.0025 /s, each with a holding function.
What data does the software report?
The computer carries out parameter setting, process control, data acquisition, processing, analysis, storage and display, including tensile strength, elastic modulus, elongation, yield strength and extension strength.
How are specimens gripped?
The machine has upper and lower jaws with a full-open structure and an automatic hydraulic clamping system, which makes clamping convenient and gives good stability during the test.
Related Products & Pages
- Hydraulic Universal Testing Machines
- WAW-D Series 30/60/100 Ton Hydraulic UTM
- WEW-300BD/600BD/1000BD Screen Display UTM
- Metal Testing Machines
About CHENJI & Support
CHENJI is the brand of Jinan Chenji International Trade Co., Ltd. (Shandong, China), a manufacturer and exporter of material testing machines since 2014, with in-house quality control plus third-party inspection by SGS or Bureau Veritas. The company holds ISO 9001 certification (626024QH073R1) and is a Bureau Veritas audited supplier (MIC-ASR2451820). Testing machines are normally supplied with a calibration certificate valid for 12 months and traceable to national force standards, and our engineers help you select the machine, fixtures and accessories for your specimen and method.
Every quotation is prepared against the standard you test to, so the delivered machine matches the test method rather than only the headline capacity. Spare parts, consumables and calibration support are available after delivery, and machines can be produced to OEM or ODM requirements when a customer drawing or specification is provided.
Selecting and Verifying a Testing Machine
Choosing a machine is a matter of matching capacity to the specimen and the method, not of buying the largest frame. A 1000 kN machine is not suitable for a sample that needs 1 N of force; capacity selection follows the specimen and the standard, and the force measuring system should be verified per ISO 7500-1 or ASTM E4 on a regular schedule. Load cells are commonly supplied as class 0.5 or class 1, which means the indicated force stays within ±0.5% or ±1% of the true force.
Test results are only comparable when they are quoted together with the standard, the specimen geometry, the test speed and the force measurement class. We are glad to review your test method and specimen so that the machine, fixtures and accessories are correctly specified before you order.
Request a Quotation
Tell CHENJI the bar or rebar diameter, the capacity you need and the test standard, and we will confirm the WAW-B series machine, jaws, fixtures and software for a quotation.
Email annie@chenjitester.com or call / WhatsApp +86 158 5311 1612.