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ASTM A182 Grade F11 Class 1 (K11597) Steel

ASTM A182 grade F11 class 1 is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. Grade F11 Class 1 is the ASTM designation for this material. K11597 is the UNS number.

It has a fairly low tensile strength among wrought alloy steels in the same category. In addition, it has a moderately low thermal conductivity and a moderately high ductility.

The graph bars on the material properties cards below compare ASTM A182 grade F11 class 1 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

150

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

23 %

Fatigue Strength

160 MPa 24 x 103 psi

Poisson's Ratio

0.29

Reduction in Area

50 %

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

300 MPa 43 x 103 psi

Tensile Strength: Ultimate (UTS)

470 MPa 69 x 103 psi

Tensile Strength: Yield (Proof)

230 MPa 33 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

430 °C 810 °F

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1420 °C 2580 °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

7.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

2.9 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.6 kg CO2/kg material

Embodied Energy

21 MJ/kg 9.1 x 103 BTU/lb

Embodied Water

52 L/kg 6.2 gal/lb

Common Calculations

PREN (Pitting Resistance)

3.0

Resilience: Ultimate (Unit Rupture Work)

89 MJ/m3

Resilience: Unit (Modulus of Resilience)

140 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

17 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

14 points

Alloy Composition

Among alloy steels, the composition of ASTM A182 grade F11 class 1 is notable for containing a comparatively high amount of chromium (Cr). Chromium is used to improve corrosion resistance and most mechanical properties (particularly at higher temperatures).

Iron (Fe) 96 to 97.7
Chromium (Cr) 1.0 to 1.5
Silicon (Si) 0.5 to 1.0
Molybdenum (Mo) 0.44 to 0.65
Manganese (Mn) 0.3 to 0.6
Carbon (C) 0.050 to 0.15
Phosphorus (P) 0 to 0.030
Sulfur (S) 0 to 0.030

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