# ASTM A182 Grade F22V (K31835) Steel

ASTM A182 grade F22V is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the normalized and tempered condition. F22V is the ASTM designation for this material. K31835 is the UNS number.

It has a fairly high embodied energy among wrought alloy steels in the same category. In addition, it has a moderately low thermal conductivity and a moderately high base cost.

The graph bars on the material properties cards below compare ASTM A182 grade F22V to: wrought alloy steels in the same category (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

## Mechanical Properties

Brinell Hardness

210

Elastic (Young's, Tensile) Modulus

190 *GPa* 28 *x 10 ^{6} psi*

Elongation at Break

21 *%*

Fatigue Strength

320 *MPa* 47 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Reduction in Area

50 *%*

Shear Modulus

74 *GPa* 11 *x 10 ^{6} psi*

Shear Strength

420 *MPa* 61 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

670 *MPa* 97 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

460 *MPa* 67 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

250 *J/g*

Maximum Temperature: Mechanical

460 *°C* 860 *°F*

Melting Completion (Liquidus)

1470 *°C* 2680 *°F*

Melting Onset (Solidus)

1430 *°C* 2610 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

39 *W/m-K* 23 *BTU/h-ft-°F*

Thermal Expansion

13 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.6 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.7 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

4.2 *% relative*

Density

7.9 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

2.5 *kg CO _{2}/kg material*

Embodied Energy

35 *MJ/kg* 15 *x 10 ^{3} BTU/lb*

Embodied Water

61 *L/kg* 7.2 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

5.6

Resilience: Ultimate (Unit Rupture Work)

120 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

570 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

24 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

11 *mm ^{2}/s*

Thermal Shock Resistance

19 *points*

## Alloy Composition

Among alloy steels, the composition of ASTM A182 grade F22V is notable for including boron (B) and niobium (Nb). Boron is used to improve hardenability. It has a substantial effect when added in even tiny amounts. Niobium is primarily used to improve yield strength.

Fe | 94.6 to 96.4 | |

Cr | 2.0 to 2.5 | |

Mo | 0.9 to 1.1 | |

Mn | 0.3 to 0.6 | |

V | 0.25 to 0.35 | |

C | 0.11 to 0.15 | |

Ni | 0 to 0.25 | |

Cu | 0 to 0.2 | |

Si | 0 to 0.1 | |

Nb | 0 to 0.070 | |

Ti | 0 to 0.030 | |

P | 0 to 0.015 | |

Ca | 0 to 0.015 | |

S | 0 to 0.010 | |

B | 0 to 0.0020 |

All values are % weight. Ranges represent what is permitted under applicable standards.

## Followup Questions

## Similar Alloys

## Further Reading

ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service