①以下厚度适用的最小延伸率:
0.5mm < t ≤ 0.7mm ,最小延伸率比表中值减少2%;
0.35mm < t ≤ 0.5mm ,最小延伸率比表中值减少4%;
t ≤ 0.35mm ,最小延伸率比表中值减少7%
②塑性应变比r90≥1.9:
1.5mm < t ≤ 2mm,r90减少0.2
t ≥ 2mm,r90减少0.4
③应变硬化指数n90≥0.21
④塑性应变比r90≥1.7:
1.5mm < t ≤ 2mm,r90减少0.2
t ≥ 2mm,r90减少0.4
⑤塑性应变值r90≥1.7
以下产品厚度适用的塑性应变值r90
0.5mm < t ≤ 0.7mm,r90减少0.2;
0.35mm < t ≤ 0.5mm,r90减少0.4;
t ≤ 0.35mm,r90减少0.6
应变硬化指数n90≥0.20:
以下产品厚度适用的应变硬化指数n90
0.5mm < t ≤ 0.7mm,n90减少0.01;
0.35mm < t ≤ 0.5mm,n90减少0.03;
t ≤ 0.35mm,n90减少0.04