Weld Performance Evaluation

For performance evaluation of welds (= joints, joint parts), leave it to JFE-TEC!

JFE-TEC's staff, with its abundant experience in diverse types of tests and experiments, provides solutions from drafting of experiment plans and preparation of test specimens to actual evaluation testing utilizing the testing machines/devices necessary in weld performance evaluations.

Test Fields

Outline of Welding Equipment

Type of welding Outline
Submerged arc welding (SAW) Arc welding method using a powder flux (fusing agent) and welding wire.
Electroslag welding (ESW) Welding method in which a welding wire is supplied continuously in a molten slag pool, and the base material and welding wire are fused mainly by the resistance heat of the molten slag.
Electrogas arc welding (EGW) Arc welding method in which a molten pool is surrounded by the edges of the base material and copper backing plates or refractory backing material, etc., and vertical position upward welding is performed while preventing the molten metal from dropping.
Metal active gas (MAG) arc welding (automatic, semi-automatic) Arc welding method using a mixture of inert gas and Carbon Dioxide (CO2) gas in the shield gas.
Tungsten inert gas (TIG) arc welding (automatic, semi-automatic) Electric welding method using a tungsten electrode and inert gas.
Shielded metal arc welding (SMAW) Arc welding method using a coated electrode (welding rod which is coated with flux and used as the electrode for arc welding).
Resistance welding Welding method in which a large current is passed in the weld, the weld is heated by the generated resistance heat, and pressure is applied. Types of resistance welding are classified as lap welding (spot welding, etc.) and butt welding (butt seam welding, etc.).
Laser welding Welding method in which the weld is heated by light energy by applying a laser beam, which is a high energy density heat source of concentrated (condensed) light.

Specifications of Commissioned Testing

Object Content
Material and joint evaluation tests Tensile test (max. 100, 250, 500, 1000, 2000 kN)
High speed tensile test (125 kN, max. 15 m/sec)
High temperature tensile test(100 kN, max. 900°C)
Charpy impact test (max. 500 J)
Hardness tests (Vickers test, micro Vickers test, Rockwell test, Brinell test)
Fracture toughness tests KIC test, CTOD test,
Large-scale welded structure evaluation tests Large-scale structure tensile test (max. 10000, 120000, 80000 kN)
Weldability tests y-groove weld cracking test, CTS cracking test(environmental temperature: -5 to +40℃)
Nondestructive inspection (NDI) X-ray inspection (200 KVP-3 mA, 250 KVP-5 mA)
Ultrasonic testing (Krautkramer, Tokyo Keiki, etc.)
Eddy current testing (25-50 kHz)
Weld temperature measurement Immersed optical fiber thermometer
(In addition to commissioned testing, JFE-TEC also sells measurement devices for clients.)

* For other types of testing not listed above, please consult with JFE-TEC.

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