Way more serious requests for half monster material. If possible, also converting 3.0 material to 3.5?
Obdurium Half Golem. Obdurium was a material in Stronghold Builder's Guide That had greater hardness than Adamantine, more HP and was technically better but more expensive version of it. It can be made a very rare material.
Glassteel Half Golem. Glassteel is a material from Champions of Valor. Same hardness and hitpoints as adamantine, but it also has the lightness, reduced armor check penalty and reduced spell failure chance of mithril.
Starmetal Half Golem. Starmetal is probably widely known, but to clarify it is in Complete Arcane. It's like Adamantine that has bonus damage against outsiders.
Aurorum Half Golem. Aurorum was a material in Book of Exalted Deeds. It was the same as steel except it had pink-indigo hue and by bringing the fragments of broken items together as a full round action, thus allowing it to seamlessly reform.
Ysgardian Heartwire Half Golem/ Ysgardian Heartwire is once more, a material in Book of Exalted Deeds. Incredibly flexible and fine, it could be used to enhance vital areas of a person wearing armors that are even light. It increased AC by 2 for purpose of confirming critical hit on the person wearing armor reinforced by it.
Living Metal Half Golem. Living Metal appeared in Magic of Faerun. It had light grey-green color and is created by powerful sources of life energy, like druidic circles, leaching energy into the soil and affecting deposits of iron nearby. Over time it naturally shaped itself to wearer increasing max dexterity by one, decreasing armor check by 1 and spell failure chance by 5% after one tenday period of wearing it. It automatically repaired itself at rate of 1 hit point per minute, unless it is brought to 0 hitpoints or destroyed(Like through disintegration). Same weight as steel, hardness of 12 and 30 hit points per inch of thickness. If it was a material for Half Golem, I suspect it will most likely give it Fast Healing.
Etc. You know what I mean, eh?
I am curious what properties you would have them give to the Half Golems and what weapons.