When carbon is absorbed into a material at elevated temperatures while in contact with a carbonaceous substance it is called carburization. Temperatures usually have to be above __________ for this to occur.

The "L" grade of stainless steels will sensitize if exposed more than several hours above _______ or long term above _____.

Corrosion from oxygen tends to be __________ type damage and can show up anywhere even if only very small amounts break through the scavenging system.

MIC is often found in _________, bottom water of storage tanks, piping with stagnant or low flow and piping in contact with some soils.

Steel hardness, __________ and stress are critical factors in causing hydrogen stress cracking.