4140 Square Bar Stock

Capital Steel & Wire is a leading distributor of cold drawn 4140 square bar stock. We work with your business to customize your order and fulfill your specific steel needs.

4140 steel has a high chromium content, which gives our 4140 square bar stock high hardenability properties. With a higher carbon content, 4140 responds well to heat treatment and has better strength and wear resistance compared to lower carbon steel grades. 4140 is useful for a wide range of product applications, including strippers, mold bases, fixtures, axels and piston rods.

To learn more about our distribution capabilities of our 4140 square bar stock give us a call at (866) 773-7800 or fill out the contact form to your right to recieve a free quote. If you have an questions about our 4140 square bar stock please do not hesitate to contact us.

Use the following chart to find phyisial and chemical properties of 4140 square bar.

4140 Chemical Properties

Carbon 0.38-0.43
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 95,000 psi
Yield Strength 60,500 psi
Elongation in 2" 25.7%
Reduction of Area 55.9%
Brinelle Hardness 197

4140 Mechanical Properties (Normalized)

Tensile Strength 148,000 psi
Yield Strength 95,000 psi
Elongation in 2" 17.7%
Reduction of Area 46.8%
Brinelle Hardness 302

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