CH900 Hardened S17700 Stainless Steel
CH900 hardened S17700 stainless steel is S17700 stainless steel in the hardened (H) condition. It has the highest strength and lowest ductility compared to the other variants of S17700 stainless steel.
The graph bars on the material properties cards below compare CH900 hardened S17700 stainless steel to: wrought precipitation-hardening stainless steels (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
Elastic (Young's, Tensile) Modulus
200 GPa 28 x 106 psi
Elongation at Break
1.0 %
Fatigue Strength
520 MPa 76 x 103 psi
Poisson's Ratio
0.28
Rockwell C Hardness
46
Shear Modulus
76 GPa 11 x 106 psi
Shear Strength
940 MPa 140 x 103 psi
Tensile Strength: Ultimate (UTS)
1650 MPa 240 x 103 psi
Tensile Strength: Yield (Proof)
1210 MPa 180 x 103 psi
Thermal Properties
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
410 °C 770 °F
Maximum Temperature: Mechanical
890 °C 1640 °F
Melting Completion (Liquidus)
1440 °C 2620 °F
Melting Onset (Solidus)
1400 °C 2550 °F
Specific Heat Capacity
480 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
15 W/m-K 8.9 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
2.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.7 % IACS
Otherwise Unclassified Properties
Base Metal Price
13 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
2.8 kg CO2/kg material
Embodied Energy
40 MJ/kg 17 x 103 BTU/lb
Embodied Water
150 L/kg 17 gal/lb
Common Calculations
PREN (Pitting Resistance)
17
Resilience: Ultimate (Unit Rupture Work)
15 MJ/m3
Resilience: Unit (Modulus of Resilience)
3750 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
59 points
Strength to Weight: Bending
40 points
Thermal Diffusivity
4.1 mm2/s
Thermal Shock Resistance
54 points
Alloy Composition
| Fe | 70.5 to 76.8 | |
| Cr | 16 to 18 | |
| Ni | 6.5 to 7.8 | |
| Al | 0.75 to 1.5 | |
| Mn | 0 to 1.0 | |
| Si | 0 to 1.0 | |
| C | 0 to 0.090 | |
| P | 0 to 0.040 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993
Corrosion of Stainless Steels, A. John Sedriks, 1996
ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994
Advances in Stainless Steels, Baldev Raj et al. (editors), 2010
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015