# ASTM A369 Grade FPB vs. ASTM A285 Carbon Steel

Both ASTM A369 grade FPB and ASTM A285 carbon steel are iron alloys.

For each property being compared, the top bar is ASTM A369 grade FPB and the bottom bar is ASTM A285 carbon steel.

Metric UnitsUS Customary Units

## Mechanical Properties

Brinell Hardness | 140 | |

110 to 130 |

Elastic (Young's, Tensile) Modulus, GPa | 190 | |

190 |

Elongation at Break, % | 19 | |

30 to 34 |

Fatigue Strength, MPa | 180 | |

150 to 180 |

Poisson's Ratio | 0.29 | |

0.29 |

Shear Modulus, GPa | 73 | |

73 |

Shear Strength, MPa | 290 | |

250 to 290 |

Tensile Strength: Ultimate (UTS), MPa | 470 | |

380 to 450 |

Tensile Strength: Yield (Proof), MPa | 270 | |

190 to 230 |

## Thermal Properties

Latent Heat of Fusion, J/g | 250 | |

250 |

Maximum Temperature: Mechanical, °C | 400 | |

400 |

Melting Completion (Liquidus), °C | 1460 | |

1470 |

Melting Onset (Solidus), °C | 1420 | |

1420 to 1430 |

Specific Heat Capacity, J/kg-K | 470 | |

470 |

Thermal Conductivity, W/m-K | 52 | |

53 |

Thermal Expansion, µm/m-K | 12 | |

12 |

## Electrical Properties

Electrical Conductivity: Equal Volume, % IACS | 7.1 | |

7.0 |

Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |

8.0 |

## Otherwise Unclassified Properties

Base Metal Price, % relative | 1.8 | |

1.8 |

Density, g/cm^{3} |
7.8 | |

7.9 |

Embodied Carbon, kg CO_{2}/kg material |
1.4 | |

1.4 |

Embodied Energy, MJ/kg | 18 | |

18 |

Embodied Water, L/kg | 46 | |

46 |

## Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m^{3} |
78 | |

110 |

Resilience: Unit (Modulus of Resilience), kJ/m^{3} |
190 | |

94 to 150 |

Stiffness to Weight: Axial, points | 13 | |

13 |

Stiffness to Weight: Bending, points | 24 | |

24 |

Strength to Weight: Axial, points | 17 | |

13 to 16 |

Strength to Weight: Bending, points | 17 | |

15 to 17 |

Thermal Diffusivity, mm^{2}/s |
14 | |

14 |

Thermal Shock Resistance, points | 15 | |

12 to 14 |