CHENJI — Material Testing Machines Manufacturer

CHENJI is the brand of Jinan Chenji International Trade Co., Ltd., a manufacturer and exporter of material testing machines based in Jinan, Shandong Province, China. We have been building testing equipment since 2014. Today a team of 26 to 50 people runs 35 machines and delivers hardness testers, universal testing machines, impact, fatigue, torsion, bolt and fastener testers, metallographic equipment and plastic testing instruments to laboratories, factories and quality departments worldwide.

Every machine we sell is backed by in-house quality control plus third-party inspection by SGS or Bureau Veritas. The company holds ISO 9001 certification (certificate 626024QH073R1) and CRCC railway product certification (CRCC10219P11758R2M, valid to 25 November 2027), and is a Bureau Veritas audited supplier (report MIC-ASR2451820, audited 29 October 2024).

Our Product Range

We cover ten product series for metal, fastener, spring, plastic and rubber material testing, with capacities from 1 N to 3000 kN. Each series page lists the individual models, their capacities and the standards they are built around, so you can move from a test method to a specific machine without guesswork.

• All products — full catalogue
• Hardness testers — Brinell, Rockwell, Vickers & Leeb
• Metallographic sample preparation
• Spectroscopy & analysis
• Electronic universal testing machines
• Hydraulic universal testing machines
• Bolt & fastener testing
• Torsion testing
• Fatigue testing
• Plastic material testing
• Impact & pressure testing
• Spring testing machines

Why Choose CHENJI

Choosing a testing 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, and test results are only comparable when they are quoted together with the standard, the specimen geometry, the test speed and the force measurement class. Our engineers review your test method and specimen first, then propose the frame, fixtures and accessories that actually fit — so the delivered machine matches the test method rather than only the headline number.

On the manufacturing and quality side, machines are produced under in-house quality control and can be inspected by a third party such as SGS or Bureau Veritas before shipment. Testing machines are normally supplied with a calibration certificate valid for 12 months and traceable to national force standards, and load cells are commonly supplied as class 0.5 or class 1 per ISO 7500-1, which means the indicated force stays within ±0.5 % or ±1 % of the true force. Machines can also be produced to OEM or ODM requirements when a customer drawing or specification is provided.

Applications & Industries

Material testing is not one test but a family of methods that follow the product. Springs are checked for load, fatigue and torsion; fasteners for torque, clamp force and friction coefficient; automotive components for tensile, fatigue and impact behaviour; rubber and plastics for tensile, flexure, melt-flow and heat-deflection properties; pipes for drop weight and hydrostatic pressure; and metallographic samples for hardness, microstructure and alloy composition. We map each of these real-world use cases to the machines and standards that apply.

If you are not sure where to start, begin at the applications hub, or use the UTM capacity selector to narrow a universal testing machine to your specimen and standard.

• Applications hub
• Standards hub
• Metal testing
• Spring testing
• Automotive testing
• Rubber testing
• Pipe & plastic testing
• Metallographic & hardness testing
• Tensile test
• Compression test
• Flexure test
• UTM capacity selector

Frequently Asked Questions

What types of material testing machines does CHENJI supply?
CHENJI supplies ten product series: hardness testers (Brinell, Rockwell, Vickers and Leeb), metallographic sample preparation equipment, spectroscopy and analysis instruments, electronic and hydraulic universal testing machines, bolt and fastener testers, torsion testers, fatigue testers, impact and pressure testers, plastic material testers and spring testing machines. Capacities range from 1 N to 3000 kN.

How do I choose the right capacity for a universal testing machine?
Capacity selection follows the specimen and the standard, not the other way around. Single-column machines are typically used from about 100 N to 5 kN, dual-column machines commonly cover 5 kN to 600 kN, and hydraulic frames are used above 600 kN. Universal testing machine capacities commonly range from 5 kN to 3000 kN. Send us your specimen and test method and we will confirm the right frame.

Which international standards do your machines support?
Our machines are built around the widely used test methods, including ISO 6892-1 and ASTM E8/E8M for room-temperature tensile testing, ISO 6508-1 and ASTM E18 for Rockwell hardness, ASTM E10 and ISO 6506 for Brinell hardness, ISO 148-1 and ASTM E23 for Charpy impact, ISO 16047 and ASTM F606 for fasteners, and ISO 7500-1 and ASTM E4 for force verification. Tell us the standard you test to and we will confirm machine, fixtures and accessories.

Do your machines come with a calibration certificate?
Yes. Testing machines are normally supplied with a calibration certificate valid for 12 months and traceable to national force standards. Force verification follows ISO 7500-1 or ASTM E4, and load cells are commonly supplied as class 0.5 or class 1.

How quickly will I receive a quotation?
We reply within one working day. Send your material, test standard, required capacity, quantity and destination port, and we will recommend the right machine and prepare a factory quotation.

Contact CHENJI

Tell us what you need to test — material, test method, required capacity and quantity. We will recommend the right machine and send a factory quotation within one working day.

Email annie@chenjitester.com or call / WhatsApp +86 158 5311 1612.