ASTM A182 Grade F12 Class 2 Alloy Steel F12 Round Bars

Product Description

ASTM A182 Grade F12 Class 2 is a low-alloy "Chrome-Moly" steel (1Cr-0.5Mo) frequently used in high-temperature environments like power plants and refineries. While Class 1 is also available, Class 2 is much more common because it offers higher strength requirements, making it the standard choice for pressure-containing parts.

1. Technical Profile

The F12 chemistry provides a balance of cost and performance for service temperatures up to approx. 565C (1050F).

2. Mechanical Properties (Class 2)

Class 2 specifies higher minimum tensile and yield strengths than Class 1, making it more robust for structural and pressure applications.

• Tensile Strength: ‰ 485 MPa (70 ksi)

• Yield Strength: ‰ 275 MPa (40 ksi)

• Hardness: Usually 143 “ 192 HBW

• Heat Treatment: Typically supplied in the Normalized and Tempered (N+T) condition to ensure a stable microstructure.

3. Featured Product Options

F12 Class 2 is available in several bar formats depending on the required precision and scale of the project.

ASTM A182 F12 Class 2 Round Bar

This is a standard industrial-grade rod often used for machining high-temperature bolts, studs, and specialized fasteners for piping systems.

• Best For: Threaded components and small internal valve parts.

F12 Alloy Steel Forged Round Bar

For larger diameters, forged bars are used to ensure superior internal grain structure and resistance to fatigue, especially in high-pressure steam lines.

• Best For: Large-diameter shafts, spindles, and heavy-duty connectors.