Grade 350 maraging steel is an alloy of iron, further classified as a maraging (18Ni) steel.
It has two common variants, each represented as a separate material.
Compressive (Crushing) Strength750 to 2400 MPa (110 to 350 x 103 psi)
Elastic (Young's, Tensile) Modulus200 GPa (29 x 106 psi)
Elongation at Break6.0 to 18 %
Rockwell C Hardness35 to 58
Tensile Strength: Ultimate (UTS)1140 to 2420 MPa (170 to 350 x 103 psi)
Tensile Strength: Yield (Proof)830 to 2300 MPa (120 to 330 x 103 psi)
Maraging Steels: Modelling of Microstructure, Properties and Applications, Wei Sha and Zhanli Guo, 2009
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993