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CNAS quality inspection report, third-party testing agency for metal products

Metal products can be seen everywhere in life, so in fact, before the quality of these metals is delivered or sold in the market, you need to find a domestic third-party inspection agency for quality inspection reports. Many metal products are closely related to people’s lives, so look for domestic ones. CNAS-qualified third-party testing agencies are more reliable. TCT third-party testing agencies have CNAS/CMA qualification authorization, and have chemical laboratories that can do some related testing and certification services for metal products. Let’s follow the editor to learn more about it.

How to handle the third-party CNAS quality inspection report of metal products?

CNAS third-party organization’s metal product testing project capabilities:

Conventional element analysis: silicon (Si), manganese (Mn), phosphorus (P), carbon (C), sulfur (S), nickel (Ni), chromium (Cr), copper (Cu), magnesium (Mg), calcium (Ca), iron (Fe), titanium (Ti), zinc (Zn), lead (Pb), antimony (Sb), cadmium (Cd), bismuth (Bi), arsenic (As), sodium (Na), potassium (K), aluminum (Al), grade determination, moisture

Metal element analysis: silver (Ag), gold (Au), palladium (Pd), platinum (Pt), rhodium (Rh), ruthenium (Ru), iridium (Ir), osmium (Os)

Physical properties: magnetic properties, electrical properties, thermal properties, oxidation resistance, wear resistance, salt spray, corrosion, density, thermal expansion coefficient, elastic modulus, hardness;

Chemical properties: atmospheric corrosion, intergranular corrosion, stress corrosion, pitting corrosion, corrosion fatigue, artificial atmosphere corrosion;

Mechanical properties: tensile, bending, yield, fatigue, torsion, stress, stress relaxation, impact, abrasion, hardness, hydraulic resistance, tensile creep, flaring, flattening, compression, shear strength, etc.;

Process performance: filament stretching, fracture inspection, repeated bending, two-way torsion, hydraulic test, flaring, bending, crimping, flattening, ring expansion, ring stretching, microstructure, metallographic analysis;

Non-destructive testing: X-ray non-destructive testing, electromagnetic ultrasonic, ultrasonic, eddy current testing, magnetic flux leakage testing, penetrant testing, magnetic particle testing

Failure analysis: fracture analysis, corrosion analysis, etc.;

Metallographic inspection: macroscopic metallography, microscopic metallography (SEM, TEM, EBSD), grain size rating, decarburization layer depth, non-metallic inclusion rating.

CNAS quality inspection report testing standards for metal products:

Serial number Standard number Standard name (Chinese and English) Release date Implementation date Pages Standard status operation

HB 6660-2011 sheet metal thermal fatigue test method

JB/T 6646-2007 Specification for Physical Performance Testing of Sintered Metal Products

QB/T 4888-2015 The measurement method of the geometric dimensions of precious metal jewelry and parts

RB/T 146-2018 Implementation Guide for Mechanical Performance Ability Verification of Metal Products for Construction Engineering

YB/T 5059-2013 Low carbon steel cold rolled steel strip

TCT third-party testing agency metal product testing range:

Steel and alloys, copper and alloys, aluminum and alloys, stainless steel, metal pipes, fasteners (bolts, nuts, rivets), welded joints and other metals, alloys and metal products, alloy products, metal coatings.

Light metals, heavy metals, deposited metals, non-ferrous metals, rare metals, precious metals, semi-metals, etc.;

Various metal and alloy products such as steel, cast iron, steel pipe, steel bar wire, welding material, steel plate section steel, copper and aluminum, steel wire rope and various metal pendants.

The role of CNAS quality inspection report for metal products:

  1. Determine whether the product quality is qualified
  2. Determine the product quality level or the severity of the defect
  3. Check the process and supervise the quality of the process
  4. Collect statistics and analyze quality data to provide a basis for quality improvement and quality management activities
  5. Carry out arbitration inspection to determine responsibility for quality accidents
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