Engineering Excellence: Deconstructing Fasto’s Latest SGS Mechanical Performance Report
At Fasto, we don’t just claim quality; we verify it through rigorous, third-party laboratory testing. Our latest SGS Test Report (No: QDIN2308001790ML02_EN) for our SS304 + SS420 Bimetal Screw series is now available.
For engineers and project managers in the solar and construction sectors, these aren't just numbers—they are the guarantee of structural integrity. Here is a breakdown of what these results mean for your next project.
1. Tensile Strength: Supporting the Heavy Loads
The Data: Our testing showed an ultimate tensile strength ranging from 670 MPa to 910 MPa, with loads reaching up to 13.03 kN for our 6.3mm series. What it means: In high-wind environments like solar farms, fasteners are under constant tension. A tensile strength of over 900 MPa ensures that even under extreme uplift forces, the screw remains intact. Notably, the broken location occurred in the "free threaded length," confirming the integrity of our head-to-shank fusion.
2. Torsional Resistance: Zero Snapping During Installation
The Data: The SGS report confirms a breaking torque of up to 12.64 N·m, comfortably exceeding the minimum requirement of 10.40 N·m. What it means: One of the biggest frustrations on-site is "head snapping" during high-speed drilling into thick steel. Our SS420 hardened tail provides the necessary torque resistance to drive through heavy-gauge metal without the risk of shearing, saving your team time and reducing material waste.
3. Vickers Hardness: Piercing the Hardest Steel
The Data:
- Core Hardness: ~506 HV10 (Requirement: 380)
- Surface Hardness: ~519 HV10 (Requirement: 490-550) What it means: A "soft" point won't drill, and an "overly brittle" point will shatter. Fasto has achieved the "Golden Mean"—a surface hardness of 519 HV10 ensures the screw can effortlessly pierce steel plates, while the core remains tough enough to avoid hydrogen embrittlement.
4. Pull-Out Load: Maximum Grip
The Data: Testing recorded pull-out loads of up to 12.98 kN. What it means: The screw’s thread design is optimized for maximum friction. In most of our tests, the sample fractured before the thread failed, meaning the connection to the base material is actually stronger than the fastener itself.
Why Material Selection Matters (SS304 + SS420)
This report focuses on our Bimetal hybrid:
- SS304 Head/Shank: Provides ultimate atmospheric corrosion resistance (C4/C5 Class).
- SS420 Hardened Tail: Provides the "drill-bit" performance needed for heavy-duty construction.
Transparency You Can Trust
We believe that professional buyers deserve more than a marketing brochure. They deserve raw, verifiable data. This SGS report is a testament to Fasto's commitment to the "Bimetal Academy" standards—where engineering meets evidence.
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View the Full Technical Specifications Download the complete 7-page SGS report and our Bimetal application guide in our technical center.