Summary of Six Main Grades of Steel

Selection from six grades of steel for CNC machining
Jack Lie CNC machining expert

Specialize in CNC Milling, CNC Turning, 3D Printing, Urethane Casting, and Sheet Metal Fabrication Services.

Mechanical Property101841304140104512154340
Tensile Strength, Yield (MPa)310460655450415470
Shear Modulus (GPa)788080608074
Elongation at Break (%)2021.525.7121022
Hardness (Brinell)131217197170167217
Density (g/cm3)7.877.857.857.877.877.85
AdvantagesExcellent weldability
Well suited to surface hardening processes
Exceptionally tough
Easy to heat-treat
Highly workable
High fatigue strength
Resistance to abrasion and impact
Good machinability in the annealed condition
Good weldability
High machinability
High strength and hardness
Free machining steel
High sulfur content
High strength
Great toughness and strength
ApplicationsSpindles, rods, shafts, pins, and mold components.Drills, taps, and aircraft engine mountings.Spindles, bolts, nuts, couplings, and automotive parts.Forged connecting rods, axles, bolts, light gearsHose fittings, screws, couplings, studs, and pins.Shafts, gears, and other structural components.