Specimen Preparation or Sample Machining,The initial and essential step in conducting destructive testing on metal materials is preparing the specimen or sample through Sample Machining or Specimen Preparation. The preparation involves shaping the sample in accordance with the standard or specification mentioned for the intended testing. Subsequently, a dimensional inspection is carried out to ensure the sample meets the design specifications after the machining process.
Zhejiang Guojian Testing Technology Co., Ltd (CCT) is the go-to solution for customers seeking precise specimen preparation to obtain accurate test results. Our in-house machine shop offers comprehensive specimen machining capabilities to prepare specimens from various materials such as raw metals, additive manufactured parts, and component parts, including metal matrix composites and hardened steels, nickel-base alloys. Furthermore, our chemistry and metallurgical labs utilize our machine shop for cutting and refining samples to the required size for further testing.
Our 20,000 sq. ft. laboratory area is specifically designed for high-speed and large-capacity specimen preparation, ensuring quick turnaround times for our customers. With state-of-the-art equipment, advanced software, and highly skilled operators, we provide meticulous workmanship to meet the most challenging specifications and unique cut plans.
Zhejiang Guojian Testing Technology Co., Ltd (CCT) also excels in the preparation of high-quality specialized specimens, backed by technical experts who offer consultation services to our customers. Our precision machining capabilities and fast turnaround times make us the preferred choice for customers of all sizes.
At Zhejiang Guojian Testing Technology Co., Ltd (CCT) , we have a wide range of precision machining equipment that includes CNC lathes, CNC mills, automatic surface grinders, CNC surface grinder, cylindrical grinders, automatic polishing stations, and EDMs. To ensure compliance with drawing requirements, all orders are inspected using optical comparators, automated optical measurement systems, and/or profilometers to verify dimensional accuracy and surface roughness. Additionally, we offer laser marking for specimen traceability as an additional service.
Our accredited low-stress grinding and polishing services are available for applicable specimens and materials. We have expertise in preparing a full spectrum of mechanical testing specimens, such as Charpy, Izod, hardness, and tensile specimens. We can also prepare specimens for fracture and fatigue testing, including HCF, LCF, C(T), DC(T), M(T), SE(B), and SEN(T). Furthermore, we can prepare corrosion specimens, weld qualification coupons, metallographic samples, and chips for ICP analysis.
We offer machine-only services in which we will machine requested specimens and return them to customers for testing. Our services are utilized by a broad range of industries, including Additive Manufacturing, Universities, Government Labs, R&D Labs, Aerospace, and Automotive, among others.
Partnering with a trusted and experienced supplier such as Zhejiang Guojian Testing Technology Co., Ltd (CCT) guarantees high-quality specimen and sample preparation, leading to accurate test results. We adhere to industry standards and specifications, including ASTM, AWS, ISO, EN, and GB, to ensure that all specimen machining is performed to the highest standards. Our detailed Certified Test Reports document every aspect of the specimen machining services performed.
At Zhejiang Guojian Testing Technology Co., Ltd (CCT) , we are accredited by NADCAP for our specimen preparation and machining services. This accreditation is a testament to our commitment to quality and our expertise in providing reliable and accurate testing solutions for a wide range of industries.
Our Machine Shop runs two work shifts to ensure fast completion of specimens, so there is no delay in the start of your testing order. We have the expertise, staff and equipment to quickly prepare a wide range of test specimens, including the following:
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· Compact Tension C(T) · Middle Tension M(T) · Single Edge Bend (SEB) · Single Edge Notch (SEN) · Surface Flaw · Rotating Beam Fatigue · High and Low Cycle Fatigue · Fracture Toughness · Flat Fatigue · RR Moore · Double Edge Notch (DEN) · Dynamic Tear · Weld Qualification |
· Stress Rupture · Charpy V-Notch Impact · Izod Impact · Torsion · Flat Tensile · Round Tensile · Round Compression · Single and Double Shear · Frequency Severity (Steel Cleanliness) · Face, Root, & Side Bend · Stress Corrosion · Hydrogen Embrittlement · Metallography Samples |
Request a quote for specimen machining to your specifications or tell us about your testing requirements, and we’ll provide a fast quote for the complete order.
· Heat Treating
The process of machining a test specimen typically involves starting with rough cutting the material using a saw or, for more precise cuts, an EDM. The type of specimen required, including its shape and features, will determine whether milling, turning, cylindrical grinding, or surface grinding is needed for the remaining machining.
After the specimen is machined, a dimensional inspection is conducted to ensure that its measurements meet the specifications required for testing. This step is crucial in verifying the accuracy and reliability of the test results.
· Types of Specimens – all test specimens and samples required for destructive testing
· Materials – metals
· Accreditations/Approvals – NADCAP accredited; Industry Standards – ASTM, AWS, ISO, EN
· CNAS
