Yield Strength (MPa) Ultimate Strength (MPa) **From Wiki**
Structural steel ASTM A36 steel 250 400
Steel, API 5L X65[1] 448 531
Steel, high strength alloy ASTM A514 690 760
Stainless steel AISI 302 - Cold-rolled 520 860
Cast iron 4.5% C, ASTM A-48 130 200
Titanium alloy (6% Al, 4% V) 830 900
Tungsten No Yeild 1,510
Silicon carbide (SiC) N/A 3,440
Sapphire (Al2O3) N/A 1,900
Silicon, monocrystalline (m-Si) N/A 7,000

Structural steel at different temperatures.

It's pretty accurate in how you are able to read them.
These however are all in elongation. You'll notice however that when you have a rather high plastic deformation stress you'll have a much smaller strain alotment. This means that the higher the stress the material is able to withstand the less able it is to deform under load.