GB/T 32796-2016 in English

1. Background and significance of standard formulation

With the increasingly stringent automobile emission regulations, exhaust system materials are facing higher requirements for heat resistance and mechanical strength. GB/T32796-2016 standard came into being, specially formulated to meet the high performance requirements of automobile exhaust systems.

2. Comparative analysis of standard frameworks

3. Interpretation of the core content of the standard

3.2 Dimensions and allowable deviations

The allowable deviations for thickness are divided into ordinary and higher types according to the accuracy level, see Table 2 for details. The allowable deviations for width are clearly specified according to different thickness ranges, and the tolerances for trimmed products are stricter.

3.3 Mechanical property requirements

Annealed steel plates and strips must meet the tensile strength, yield strength and elongation specified in Table 10. Different tensile specimen specifications are recommended for products of different thicknesses.

3.4 Surface quality and processing type

The surface processing types are divided into 2D (cold rolling + heat treatment + pickling), 2B (bright and flattened on the basis of 2D) and BA (cold rolling + bright annealing). The purchaser should select the appropriate surface state according to the use requirements.