731Production of coke oven coke

#### 731 Production of coke oven coke The production of coke oven coke is the physical and chemical transformation (at a temperature higher than 900 °C) of coal into coke oven coke that: (a) has a coke strength after reaction (CSR) value of at least 50% for at least 80% of the coke oven coke produced; and (b) has a coke reactivity index (CRI) value of no more than 40% for at least 80% of the coke oven coke produced.