Welding Material Testing
Welding material inspection, carbon steel electrodes, low alloy steel electrodes, stainless steel electrodes, overlay welding electrodes, solid wire, flux-cored wire, metal powder core wire, submerged arc welding wire + flux combination, welding tape + flux combination, copper-based brazing filler metal, silver-based brazing filler metal, aluminum-based brazing filler metal, hard brazing solvent, wear-resistant overlay welding wire, nickel-based alloy welding material, titanium alloy welding material, aluminum-magnesium alloy welding, welding protection gas (Ar, CO2, Ar + CO2 mixed gas), welding nails, welding ceramic pads.
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Product Introduction
Testing items
Welding material inspection, carbon steel electrodes, low alloy steel electrodes, stainless steel electrodes, overlay welding electrodes, solid wire, flux-cored wire, metal powder core wire, submerged arc welding wire + flux combination, welding tape + flux combination, copper-based brazing filler metal, silver-based brazing filler metal, aluminum-based brazing filler metal, hard brazing solvent, wear-resistant overlay welding wire, nickel-based alloy welding material, titanium alloy welding material, aluminum-magnesium alloy welding, welding protection gas (Ar, CO2, Ar + CO2 mixed gas), welding nails, welding ceramic pads
Testing scope
Welding materials for marine engineering: seawater corrosion test, hydrogen-induced cracking (HIC) test
Welding materials for pressure vessels: burst test, fatigue test, high-temperature and high-pressure performance test (NB/T 47018)
Welding materials for nuclear power: special inspection of nuclear grade materials (RCC-M standard), radioactive contamination inspection
Welding materials for bridges: anti-fatigue performance, low-temperature toughness enhancement test
Appearance and size testing: diameter tolerance, length deviation, surface quality, clear marking
Chemical composition analysis: content of elements such as C, Si, Mn, S, P, Cr, Ni, Mo, Ti, etc.
Mechanical performance testing: tensile test (tensile strength, yield strength, elongation after fracture), impact test (-20℃/-40℃ low-temperature impact energy KV₂), bending test (bending angle, bending radius, face bending / back bending / side bending)
Process performance testing: arc stability, slag removal performance, molten metal fluidity, spatter rate
Metallographic inspection of weld metal: (grain size, structure type, inclusion rating)
Hardness testing: Brinell hardness HB, Rockwell hardness HRC, Vickers hardness HV
Corrosion resistance: intergranular corrosion, pitting corrosion, salt spray test
Diffusion hydrogen content test: glycerol method, mercury method, gas chromatography method
Stress corrosion cracking test
High-temperature performance test: high-temperature tensile, creep test, endurance strength
Low-temperature performance test: low-temperature impact, low-temperature tensile
Testing standards
GB/T 25774.1-2023 Inspection of welding materials - Part 1: Preparation of mechanical property test specimens for steel, nickel and nickel alloys
GB/T 25774.2-2017 Inspection of welding materials - Part 2: Preparation of impact test specimens
GB/T 25774.3-2023 Inspection of welding materials - Part 3: Preparation and inspection of T-joint fillet weld test specimens
GB/T 25774.4-2017 Inspection of welding materials - Part 4: Preparation and inspection of hardness test specimens
GB/T 25775-2017 Welding material supply technical conditions - Product type, size, tolerance and marking
GB/T 2652-2022 Test method for weld and deposited metal tensile strength
GB/T 2650-2022 Test method for impact strength of welded joints
GB/T 2653-2022 Test method for bending strength of welded joints
GB/T 4340.1-2009 Metal materials - Vickers hardness test - Part 1: Test method
GB/T 231.1-2018 Metal materials - Brinell hardness test - Part 1: Test method
GB/T 5293-2018 Chemical composition analysis method for welding materials
GB/T 4336-2016 Spark source atomic emission spectroscopy analysis method for carbon steel and low-medium alloy steel
GB/T 20125-2006 Determination of multi-element content in low alloy steel by X-ray fluorescence spectrometry
GB/T 22086-2016 Determination of diffusion hydrogen content of welding materials
GB/T 4334-2020 Corrosion of metals and alloys - Test method for intergranular corrosion of stainless steel
GB/T 13814-2022 Metallographic inspection method for welded joints
GB/T 10120-2018 Test Method for Tensile Stress Corrosion in Metallic Materials
was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.
The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.
