Sinorock’s Hollow Bar has been tested by SGS-CSTC Standards Technical Services Co., Ltd. Nanjing Branch to evaluate its tensile properties. The SGS test report, No. NJIN2511002861ML02_EN, was issued on November 19, 2025. The tested product was a SDR38/20-500-400-W5.50 Hollow Bar made of Q355B steel.
SGS Tensile Test Results
The tensile test was conducted on an unmachined specimen. The tested hollow bar achieved a maximum force of 587.41 kN, a tensile strength of 838 MPa, and a proof strength of 776 MPa. The percentage total elongation at maximum force (Agt) was 5.0%.
The report also records elongation after fracture of 9.5% at L0=150 mm, 12.5% at L0=100 mm, and 9.0% at L0=200 mm.
Test Report Information
- Testing Organization: SGS-CSTC Standards Technical Services Co., Ltd. Nanjing Branch
- Report No.: NJIN2511002861ML02_EN
- Test Date: November 3–19, 2025
- Sample: Hollow Bar
- Product Specification: SDR38/20-500-400-W5.50
- Material: Q355B
- Test Type: Tensile Test
- Tensile Strength (Rm): 838 MPa
- Proof Strength (Rp0.2): 776 MPa
- Maximum Force (Fm): 587.41 kN
- Total Elongation at Maximum Force (Agt): 5.0%
What This SGS Test Report Demonstrates
The SGS tensile test provides independently tested mechanical performance data for the specified Sinorock Hollow Bar sample. The reported tensile strength, proof strength, maximum force, and elongation results provide measurable technical data for evaluating the mechanical properties of the tested hollow bar.
The report applies specifically to the sample tested and the product information submitted and confirmed by the client.
