4140 Hot Rolled Bar

Capital Steel & Wire is a leading domestic and international distributor of 4140 grade hot rolled steel bar stock.

4140 hot rolled bar is a medium carbon alloy steel with good fatigue and impact resistance after heat treating. 4140 hot rolled steel has many applications, including drill collars, chain pins, bolts and sprockets.

4140 Chemical Properties

Carbon 0.38-0.45
Manganese 0.75-1.00
Phosphorus, Max % 0.035
Sulfur, Max % 0.040
Silicon 0.15-0.35
Chromium 0.80-1.10
Molybdenum 0.15-0.25

4140 Mechanical Properties (Annealed)

Tensile Strength 90,000-100,000 ksi
Yield Strength 60,000-70,000 ksi
Elongation in 2" 20-30%
Reduction of Area 50-60%
Brinelle Hardness 185-210

4140 Mechanical Properties (Heat Treated)

Tensile Strength 130,000 ksi
Yield Strength 110,000 ksi
Elongation in 2" 16%
Reduction of Area 50%