For long term service, it is best restricted to a maximum of 593°C, because of the long term exposure above 593°C,It will result in significant embrittlement.
N'ihi ogologo oge ọrụ, ọ na-kacha mma nanị a kacha nke 593 °C, n'ihi na ogologo oge n'ebe n'elu 593 °C ga-eme ịrịba embrittlement.