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We are a fully integrated steel wire testing center operating to international standards. SIW is committed to delivering high-precision testing services that support engineering and industrial applications requiring the highest level of reliability.
Our comprehensive testing services include:
1. Fatigue Test
2. Relaxation Test
3. Tensile Test
4. Salt Spray Test
5. Chemical Analysis
With customizable testing procedures tailored to your specific requirements and accuracy exceeding 99.95%, SIW ensures reliable, fast, and industry-compliant results across all sectors.
At SIW, we are dedicated to providing accurate, timely, and standards-aligned testing outcomes you can trust.
SIWTestingService MaterialTesting InternationalStandards SteelWireTesting
05-05-2026
SIW’s first delivery of Compacted Coil PC Wire to PST Concrete, a major manufacturer of electric poles, piles, and floor planks in Saraburi province, which helps increase operational performance:- Increase Productivity- Increase Efficiency- Increase SafetySIW delivers products directly to the customer's site, controlling quality from production to the project site, with steel wire quality that meets international standards. Click >>HERE<< to see more detail about our Compacted Coil PC Wire.
21-09-2026
SIW เดินหน้าสู่ Green Steel ด้วยการพัฒนากระบวนการผลิตและดูแลสิ่งแวดล้อมอย่างต่อเนื่อง Solar Rooftop และ Solar Carport รวม 2.22 MWp จำนวน 4,060 แผง พื้นที่สีเขียวภายในโรงงาน 3.83 ไร่ หมุนเวียนน้ำกลับมาใช้ 1,000 ลบ.ม./วัน อีกหนึ่งความตั้งใจของ SIW ในการสร้างผลิตภัณฑ์ที่แข็งแรง ควบคู่ไปกับการดูแลสิ่งแวดล้อมอย่างยั่งยืน
09-11-2023
On 9 November 2023, SIW, led by Mr. Krishnendu Sanyal, Managing Director, and the management team, hosted a welcoming event for " The Association of Thai Concrete Product Industry” The association visited to explore the operations, listen to the company's vision, tour the production processes, various innovations, and SIW - Integrated Agriculture Learning Center. SIW places significant importance on the organization's potential, emphasizing the production of high-quality products adhering to international standards, transparent business practices, and an unwavering commitment to social and environmental responsibility. This commitment is integral to the sustainable development of the organization.
21-09-2026
SIW Promotes Learning Beyond the Classroom and Its Practical Application in Civil EngineeringOn September 9, Siam Industrial Wire Co., Ltd. (SIW) had the opportunity to share knowledge with civil engineering students at Kasetsart University, Kamphaeng Saen Campus, as part of the “SIW Civil Engineering Day.”During the activity, students learned about PC Wire and PC Strand—from their properties and testing processes to their practical applications in construction and infrastructure projects.SIW hopes that this knowledge-sharing session provided students with new perspectives, helped connect classroom knowledge with real-world industry practices, and contributed to preparing them to become skilled engineers in the future.We would like to express our sincere gratitude to Asst. Prof. Dr. Penpitcha Sanit-in for her kind support, coordination, and for giving SIW the opportunity to share our knowledge with the students. We would also like to thank all faculty members and students for their warm welcome and enthusiastic participation. We look forward to meeting you again on another occasion.
27-06-2022
SIW & TSN Wires joined the opening ceremony of the Road Safety Center between 11-17 Apr 2022 organized by Bankhai, Rayong to reduce the number of road mishaps on Songkran Festival which is a long holiday for traveling. Our company has supported drinking water and safety bag for distributing among riders on the road at the main checking point in front of Ban Khai school, Ban Khai district, Rayong province.
19-12-2025
SIW warmly welcomes the Department of Civil Engineering, Faculty of Engineering, Naresuan University, who joined the SIW Open House Experience the Industrial World Together with Naresuan University on December 18, 2025, at The Siam Wire Industrial Co., Ltd. , Rayong Province.During this event, students had the opportunity to study and explore real working processes within the factory, from production to the Research and Development (R&D Center), and Quality Control. This hands-on experience allowed students to gain practical knowledge and understanding, bridging the gap between classroom learning and real-world work.We would like to extend our gratitude to Assoc. Prof. Dr. Phongthorn Julphunthong and Dr. Nattapat Wongpakdee, for honoring us with their presence at the SIW event. We sincerely hope that this activity will be an important step in fostering collaboration between academia and industry.We look forward to continued cooperation with the Department of Civil Engineering, Faculty of Engineering, Naresuan University, in creating knowledge and developing the next generation of engineers.#SIWxNU #AcademicCollaboration #DevelopingFutureEngineers #CivilEngineering #SIW #PCWire #PCStrand
21-09-2026
Accurate test results are the foundation of reliable quality.SIW provides wire testing services through a laboratory accredited to ISO/IEC 17025 by NATA. With advanced testing equipment and an experienced team of specialists, we deliver accurate and consistent results that can be confidently referenced in engineering applications.Our services include Fatigue Testing, Relaxation Testing, Chemical Analysis, and Salt Spray Testing for PC Wire and PC Strand in accordance with relevant international standards. These services support both product quality control and material verification before actual use.Because every strong structure begins with properly tested materials.For more information:Tel. 02-013-5455
We are relentless in our pursuit for excellence in product quality and innovation. We take pride in being able to anticipate your needs and provide tailored solutions for each of your requirements. We strive to exceed expectations.