Tensão normal no aço
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The steel normal stress calculator determines the stress (σ) applied to a metallic material using the formula σ = F/A, where F is the applied force and A is the cross-sectional area. This metric is crucial for assessing whether the material can withstand loads without excessive deformation or fracture.
It works by dividing the force (in newtons) by the cross-sectional area (in square meters or square millimeters). For example, a 5000 N force applied to a 100 mm² bar results in 50 MPa stress. The result is commonly used in structural projects like beams and columns to ensure safety.
Use this calculator for structural steel projects, such as buildings, bridges, or machinery. Always check the material's strength limits and consistent units. Values exceeding the allowable stress indicate potential failure risks.
Key considerations include verifying that the calculated area matches the actual steel cross-section and ensuring the applied force excludes dynamic or impact factors. For critical projects, validate results with standards like ABNT NBR 8800.
Frequently asked questions
What is normal stress in steel?
It is the uniform distribution of force (in newtons) over the cross-sectional area (in m²/mm²), indicating the pressure the steel can withstand without deformation.
How does the calculator apply σ = F/A?
Enter the total force (e.g., load) and the steel's cross-sectional area. The calculator divides F by A automatically, displaying the result in MPa or Pa.
Which units should be used for force and area?
Force in newtons (N) and area in square meters (m²) or square millimeters (mm²). Convert units to maintain consistency.
When to use this calculator in projects?
To size steel structures, verify beam/column strength, or check static loads. Avoid use for dynamic loads without adjustments.
What if the calculated stress exceeds the steel's limits?
Redimension the steel section, choose a higher-strength material, or redistribute loads to ensure structural safety.