When manufacturing critical components like disc springs, quality isn’t just a feature — it’s a requirement. That’s why global manufacturers follow strict standards to ensure performance, safety, and durability.
One such important standard is GB/T1972-2005 — the national technical standard in China that defines how disc springs should be designed, produced, and tested.
Let’s break it down in simple terms.
📘 What Is GB/T1972-2005?
GB/T1972-2005 is a technical standard that outlines specifications for disc spring dimensions, tolerances, material grades, surface quality, and heat treatments. It ensures that springs perform reliably under high stress and over long operational lifespans.
⚙️ Key Elements of GB/T1972-2005 for Disc Springs
✅ 1. Material Specifications
Preferred materials include 60Si2MnA and 50CrVA, both known for their high strength and fatigue resistance. The standard also allows the use of stainless steel, heat-resistant alloys, and specialty materials upon agreement.
✅ 2. Dimensional Accuracy
The standard defines first-level and second-level precision for disc spring dimensions — such as outer diameter, inner diameter, thickness, and free height. The tolerance level directly affects load accuracy.
✅ 3. Surface Quality
The surface finish must meet specific roughness requirements. There should be no cracks, burrs, or defects that can reduce spring performance.
✅ 4. Heat Treatment Guidelines
Proper quenching and tempering is mandatory. For example, hardness must fall between 42HRC to 52HRC, and decarburization depth should be within 3–5% of the spring’s thickness, depending on group classification.
✅ 5. Stacking & Compression Testing
The spring must undergo a strong pressure treatment — typically a pre-load test of 0.75h₀ for 12 hours or at least 5 cycles of full load compression to ensure long-term stability.
🏭 Why GB/T1972-2005 Matters
Compliance with this standard ensures:
🔧 Safe and predictable spring behavior
🧪 High reliability in critical systems
⚙️ Compatibility with global industrial machinery
🛡️ Extended service life & minimized failure rates
At Three Ants Precision Machinery, all disc springs are manufactured under strict quality control, meeting or exceeding the GB/T1972-2005 standards.
📢 Conclusion
Understanding and following GB/T1972-2005 isn’t optional — it’s essential for companies that prioritize safety, durability, and precision. If you’re sourcing disc springs for critical applications, make sure your supplier meets this benchmark.
Three Ants delivers certified disc springs — tested, treated, and trusted.
Need springs that meet exact standards?
👉 Contact us today to get a quote or request technical data.