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).
| Fe | 96 to 97.7 | |
| Cr | 1.0 to 1.5 | |
| Si | 0.5 to 1.0 | |
| Mo | 0.44 to 0.65 | |
| Mn | 0.3 to 0.6 | |
| C | 0.050 to 0.15 | |
| P | 0 to 0.030 | |
| 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