Yield. UTS.
Comparative.
Strength reference.
Material strength reference. Yield, UTS, fatigue limits across common engineering materials. Quick lookup for design calculations.
Key principles.
Yield 250 MPa
Standard structural steel.
Yield 415-655 MPa
Quench-tempered 4140 alloy steel.
Yield 475-1100 MPa
Higher-strength quench-tempered.
Yield 215 MPa
Annealed 304. Cold work increases significantly.
Yield 170 MPa
Slightly lower than 304.
Yield 275 MPa
T6 heat treated.
Yield 505 MPa
Premium aerospace aluminum.
Yield 880 MPa
Aerospace titanium alloy.
Yield 1170 MPa
Aerospace nickel superalloy.
FAQ
Yield vs design stress?
Design typically yield/safety factor. Safety factor 1.5-3 typical. Aerospace 1.5. Pressure vessels 4. Per code.
Material grade affects strength?
Major. 4140 annealed 415 MPa, quenched 1100 MPa. Always specify heat treat condition.
Fatigue limits?
Steel ~50% UTS for 10⁷ cycles. Aluminum no true limit — endurance value at 10⁹ cycles. Cyclic loading dominated by fatigue.
Strength at temperature?
Most materials lose strength at high temperature. Aluminum: half strength at 200°C. Specify per service temp.
Notch sensitivity?
High-strength materials more notch-sensitive. Stress concentrations critically reduce strength.
How to specify strength?
By material grade + heat treat (e.g., "4140 quenched and tempered to UTS 850 MPa"). Or per code spec.