SUS and SS Stainless Steel Metals Testing

Delve into the critical testing processes for stainless steel, including chemical composition analysis, mechanical testing, corrosion resistance testing, and weldability testing, to guarantee its quality, performance, and compliance with industry standards.

by | Mar 27, 2024

In working with metals, one might see the abbreviations “SUS” and “SS.” The abbreviations are different designations from different systems of naming metals. “SUS” is from the Japanese Industrial Standards and stands for “Steel Use Stainless.”  “SS” stands for “Stainless Steel” and is the more generally used international abbreviation.

Stainless steel is an alloy of chromium and nickel. To ensure its quality, performance, and compliance with industry standards, various types of testing may be performed on stainless steel. Depending on the intended use of the stainless steel, some of the following tests may be done: 

  • Chemical composition analysis involves determining the elemental composition of the stainless steel, including the percentage of chromium, nickel, molybdenum, and other alloying elements.
  • Various mechanical testing which includes tensile testing, hardness testing, and impact testing.
  • Corrosion resistance testing which includes salt spray testing, pitting corrosion testing, and intergranular corrosion testing. 
  • Weldability testing

How Contract Laboratory helps with stainless steel testing.

Whether you refer to it as SS or SUS stainless steel, Contract Laboratory can help you with your stainless steel or stainless steel product testing. Below are some examples of how Contract Laboratory has helped with stainless steel testing:

  • Metallurgical Laboratory needed for testing of stainless steel for SUS304
  • Contract Laboratory needed for measuring the SRI (Solar Reflective Index) of stainless steel material.
  • Contract Laboratory needed for testing 2 pcs of 200mm circular saw blade as per BS EN 13236 standard. The recent batch of saw blades we imported have broken and the flying broken piece has injured many workers in the vicinity. We want a lab certificate to check the steel and welding strength. The test method and target measures are given in BS EN 13236. Please let us know if your lab can do this test to confirm the manufacturing defect.
  • Metallurgical Laboratory needed for complex permeability measurements of various steel alloys for comparative analysis. We’ll provide test samples in the form of 10mm and 12mm diameter rods.
  • Contract Metallurgical laboratory needed for SAE and FEPA testing of steel shot/brown fused alumina as per the following: 1. Hardness (HV/HRC for steel shot, MOHS for BFA) 2. Chemical content (for steel shot: C, S, Fe?; for BFA: Al2O3, SiO2?) 3. Density 4. Size (for BFA follow FEPA (Federation of European Producers of Abrasives) size distribution, for steel shots follow SAE size distribution)

Does your company need stainless steel testing? Simply, Submit a Laboratory Request


  • Passionate science/technology entrepreneur and founder of, the first web-based platform for laboratory outsourcing and scientific sourcing. . Proud, award-winning former FDA, US Food and Drug Administration Consumer Safety Officer, Medical Device Specialist, International Cadre.

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