Name: Sae 4140 Alloy Round Bar
Brand: Nippon Alloys Inc
Availability: InStock
Rating: 5 (15 reviews)

Question 1

What Does SAE Mean in SAE 4140 Alloy Round Bar?

Accepted Answer

SAE stands for the Society of Automotive Engineers, an organization that establishes engineering standards for various industries, including automotive, aerospace, and manufacturing.

Question 2

What is SAE 4140 alloy round bar?

Accepted Answer

It's a round bar made from SAE 4140 steel, a medium-carbon, chromium-molybdenum alloy steel.  The "SAE" designation refers to the Society of Automotive Engineers, a standard-setting organization.  4140 is known for its excellent balance of strength, toughness, and hardenability.

Question 3

Is SAE 4140 steel round bar weldable?

Accepted Answer

Yes, but pre-heating and post-weld heat treatment are often required, especially for thicker sections, to prevent cracking.  Consult a welding expert for specific recommendations.