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  • Sulfide Stress Cracking (SSC) Testing

    In the presence of water and hydrogen sulfide (H2S), a kind of metal cracking related to corrosion and tensile stress is called hydrogen sulfide/sulfide stress cracking (SSC). SSC is a kind of hydrogen stress cracking, which is related to metal embrittlement caused by hydrogen atoms generated by acid corrosion on the metal surface. The presence of sulfides promotes the absorption of hydrogen. Atomic hydrogen can diffuse into the metal, reducing ductility and increasing the susceptibility to cracking. High-strength metal materials and hard weld areas are prone to SSC. In oil and natural gas (especially natural gas) long-distance pipelines, the sulfide stress corrosion cracking of high-pressure and high-strength pipelines can cause major safety accidents. Therefore, it is necessary to evaluate the anti-SSC performance of pipeline steel to ensure the safety of the pipeline.

    T,C&A sulfide stress cracking (SSC) testing lab

    T,C&A Lab is an independent third-party testing and research organization focusing on materials, which can provide SSC testing service according to NACE TM 0177 method and ISO standard tests. Our testing services can help customers evaluate the susceptibility of materials to H2S/sulfide stress corrosion cracking in a wet H2S environment, and select suitable materials for working in H2S media.

    The test solutions we provide include but are not limited to:

    We evaluate the performance of oil and natural gas pipelines, high-pressure and high-strength pipelines, boilers, liquefied gas tanks, etc. for sour service applications using the following test methods:

    • NACE TM0177

    Method A – Uniaxial Tensile Testing
    Sample requirements: The length of the sample is not less than 100mm, the working section should be 25.4mm long and 6.35±0.13mm in diameter. For small non-standard samples, the test section diameter is 3.81±0.05mm and the working section is 25.4mm long. There are 3 samples in each group.

    Method B – Bent Beam Testing
    Sample requirements: Sample length×width×thickness=67.3mm×4.57mm×1.52mm.

    Method C – C-Ring Testing
    Sample requirements: The outer diameter is not less than 15.9mm, the ratio of width to thickness is between 2-10, and the ratio of diameter to thickness is between 10-100.

    Method D – Double Cantilever Beam (DCB) Testing
    Sample requirements: Conventional sample length×width×thickness not less than 101.6mm×25.4mm×9.35mm, thin sample thickness not less than 4.76mm

    • NACE TM0316

    Four Point Bend Test

    • EFC 16

    Carbon and Low Alloy Steel Test Methods

    • EFC 17

    Corrosion-Resistant Alloys (CRA) Test Methods

    Standards we test to

    NACE TM 017Metal is Resistant to Sulfide Stress Cracking and Stress Corrosion in H2S Environment
    NACE MR 0175Petroleum and Natural Gas Industries—Materials for Use in H2S-containing Environments in Oil and Gas Production
    NACE TM0316Four-Point Bend Testing of Materials for Oil and Gas Applications
    ISO 15156Petroleum and Natural Gas Industries — Materials for Use in H2S-containing Environments in Oil and Gas Production
    ISO 7539Corrosion of Metals and Alloys — Stress Corrosion Testing
    EFC 16Guidelines on Materials Requirements for Carbon and Low Alloy Steels for H2S-Containing Environments in Oil and Gas Production
    EFC 17Corrosion Resistant Alloys for Oil and Gas Production - Guidance on General Requirements and Test Methods for H2S Service

    In addition, the experts in our Sulfide Stress Cracking (SSC) Testing Laboratory also provide a variety of custom tests as you need. Let's discuss the customized service with our experts for free.

    Instruments and data

    Sulfide Stress Cracking 1
    Sulfide Stress Cracking 2
    Sulfide Stress Cracking 3
    Sulfide Stress Cracking 4
    Sulfide Stress Cracking 5


    1. El-Sherik, A. M.; et al. Trends in oil and gas corrosion research and technologies: Production and transmission. Woodhead Publishing, 2017.
    2. Ziaei, S. M. R.; et al. Sulfide stress corrosion cracking and hydrogen induced cracking of A216-WCC wellhead flow control valve body. Case Studies in Engineering Failure Analysis 1.3 (2013): 223-234.

    Note: this service is for Research Use Only and Not intended for clinical use.


    T,C & A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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