S17400 Stainless Steel vs. SAE-AISI H22 Steel

Both S17400 stainless steel and SAE-AISI H22 steel are iron alloys. They have 78% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is SAE-AISI H22 steel.

UNS S17400 (17-4 PH, Alloy 630) Stainless Steel SAE-AISI H22 (T20822) Tungsten Hot-Work Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		75
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		910 to 1390
Tensile Strength: Ultimate (UTS), MPa		700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		250

Melting Completion (Liquidus), °C		1440
Melting Completion (Liquidus), °C		1670

Melting Onset (Solidus), °C		1400
Melting Onset (Solidus), °C		1620

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		440

Thermal Conductivity, W/m-K		17
Thermal Conductivity, W/m-K		31

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		14
Base Metal Price, % relative		28

Density, g/cm³		7.8
Density, g/cm³		8.7

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		4.9

Embodied Energy, MJ/kg		39
Embodied Energy, MJ/kg		73

Embodied Water, L/kg		130
Embodied Water, L/kg		72

Common Calculations

PREN (Pitting Resistance)		16
PREN (Pitting Resistance)		21

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		32 to 49
Strength to Weight: Axial, points		22 to 61

Strength to Weight: Bending, points		27 to 35
Strength to Weight: Bending, points		20 to 39

Thermal Diffusivity, mm²/s		4.5
Thermal Diffusivity, mm²/s		8.2

Thermal Shock Resistance, points		30 to 46
Thermal Shock Resistance, points		22 to 60

Alloy Composition

Carbon (C), %		0 to 0.070
Carbon (C), %		0.3 to 0.4

Chromium (Cr), %		15 to 17
Chromium (Cr), %		1.8 to 3.8

Copper (Cu), %		3.0 to 5.0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		70.4 to 78.9
Iron (Fe), %		82.2 to 87.4

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.15 to 0.4

Nickel (Ni), %		3.0 to 5.0
Nickel (Ni), %		0 to 0.3

Niobium (Nb), %		0.15 to 0.45
Niobium (Nb), %		0

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0.15 to 0.4

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.030

Tungsten (W), %		0
Tungsten (W), %		10 to 11.8

Vanadium (V), %		0
Vanadium (V), %		0.25 to 0.5