Japan: Nippon Steel to disclose CO2 emissions for automotive steel
Japan: Nippon Steel to disclose CO2 emissions for automotive steel...
Nippon Steel Corporation announced on 24 Jan'22 that it will disclose the amount of carbon dioxide (CO2) emissions generated across its processes from manufacturing to disposal and recycling of steel products supplied to auto manufacturers.
Using a calculation model proposed by an external organization, the company will provide evaluation results for each product upon request from customers.
In the automobile industry, there is a growing global emphasis on the idea that CO2 emissions should be reduced not only during vehicle operation, but also throughout the supply chain. The environmental performance of steel over its entire life cycle will be clearly indicated to maintain and strengthen the superiority of products for automobiles.
The method of evaluating the environmental impact of a product over its entire life cycle is called Life Cycle Assessment (LCA). The evaluation method adopted by Nittetsu is the LCA calculation model for automobiles developed by the University of California, Santa Barbara.
Last year, Nittetsu began proposing this method to automobile manufacturers. The model is applicable to all steel materials for automotive components and provides evaluation results on CO2 emissions from steel materials at the design stage.
Vehicle materials such as steel, aluminum alloy, and carbon fibre reinforced plastic (CRFP) has its own CO2 emission intensity during manufacturing, emissions per unit of production. The adopted method first calculates the CO2 emissions of a single vehicle based on these differences in emission intensity. Then the emissions of specific components are extracted and evaluated.
According to Nittetsu's calculations, for example, a bumper beam made of 2-gigapascal hot-stamped steel, the strongest steel sheet available, emits about 50% less CO2 than the same part made of extruded aluminum.
According to estimates, for example, a bumper beam made of 2-gigapascal hot stamped steel, which is the strongest steel plate, emits about 50% less CO2 than the same part made of extruded aluminum. Since both materials contribute to reducing the weight of parts, the amount of CO2 emissions reduction during vehicle operation is the same, but steel has an advantage in each process of manufacturing and parts processing.
This estimation does not take into account the effect of recycling, but it can be evaluated by taking recyclability into account.
Note: This insight has been published in accordance with an article exchange agreement between SteelMint and Japan Metal Daily.