Blue steel

Blue steel is a hard metal used by the Kharad dwarves to construct their armour and weapons because it is three times as hard and far more durable than base steel, the Dwarven smiths make weapons and armour for others with it but at a high premium.
Blue steel is also well known for taking magic properties on more easily for almost everything but Elvish silver steel, and once it is imbued with that magic it makes it easier for more magic to be worked into it, the magic in Blue steel weapons and armour also evolves at a quicker rate than that of other metals.

Properties

Material Characteristics

Blue steel looks like steel but a gunmetal blue colour when it is melted down and cooled to bars of metal, but when it is in it's impure ore state it is a black-blue colour and sometimes has Green copper mixed in with it, a compound that the Dwarves use to make their steam engine water pipes as it does not get hot when hot water is run through it.

Physical & Chemical Properties

Blue steel is three times as hard and more durable than normal steel, but once it has been worked cannot be reworked or it will weaken it sometimes to the point that it isn't even as hard as steel.

Compounds

The Dwarves of the Kharads often work Blue steel with other metals which are impervious to flame, electricity, cold, etc to defend against whatever Dragonkind that inhabit their mountains.

Geology & Geography

Blue steel is found in many of the Dwarven Kharads but not all of them, but due to the intertrade with the Kharads the sale of Blue steel is at a far lower cost than to outsiders

Origin & Source

Blue Steel is found in an ore of the same name, this ore is often found with other high melting point metals like green copper and purple zigot, and within the mine shafts which the ore is found there are many precious gems found like red diamonds and black Garnets.

Life & Expiration

Blue Steel starts to rust if it hasn't had maintenance after 3 to 4 hundred years, but the deterioration can be reversed by proper maintenance, it takes over 1000 years before the damage becomes irreparable

Color

Gunmetal blue

Melting / Freezing Point

The ore melts at 200 degrees Celsius, but once it is in a metal bar form needs to be heated to 300 degrees Celsius to be formed and worked into it's final form

Common State

Blue steel is most commonly found in a solid ore state or in a solid metal state