300 Maraging Steel Alloy Product Guide

Applications | Specifications | Mechanical and Chemical Data

Overview

Maraging Steel Alloy is a carbon free iron-nickel blend of steel with hint of aluminum, titanium, cobalt, and Molybdenum. It is easily cold worked, forged, and welded. Additionally, maraging steel has good machinability. It is a very high strength, comparatively low weight metal often used in the aerospace industry.

Common Trade Names

AISI Grade 18Ni(300), UNS K93120

Other Resources

Weight Calculator | Mill Test Reports

Products

300 Round Bar

Applications

Aerospace

Specifications

AMS	MIL
6514	S46850

	Annealed
Physical Properties 300
Density	0.289 lb/in3
Ultimate Tensile Strength	150 ksi
Yield Tensile Strength	110 ksi
Shear Modulus	10,600 ksi
Shear Strength	92 ksi
Hardness Rockwell \| Brinell	B106 \| 294
Elongation at Break Percentage	18%
Reduction of Area	61.3%
Modulus of Elasticity	27,500 ksi
Poisson's Ratio	0.30
Melting Point	2,600-2,690 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	176 BTU-in/hr-ft^2-°F

Chemistry Information
Element	Percentage
Al	0.1
B	0.003 max
Co	9
C	0.03 max
Fe	67
Mn	0.1 max
Mo	4.8
P	0.01 max
Ni	18.5
Si	0.1 max
S	0.01 max
Ti	0.6
Zr	0.01