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AISI 321H Stainless Steel vs. AISI 334 Stainless Steel

Both AISI 321H stainless steel and AISI 334 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 321H stainless steel and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 200
150
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 82
79
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
360
Tensile Strength: Ultimate (UTS), MPa 580
540
Tensile Strength: Yield (Proof), MPa 230
190

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 480
490
Maximum Temperature: Mechanical, °C 940
1000
Melting Completion (Liquidus), °C 1430
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 16
22
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.2
4.1
Embodied Energy, MJ/kg 46
59
Embodied Water, L/kg 140
170

Common Calculations

PREN (Pitting Resistance) 18
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140
96
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
19
Strength to Weight: Bending, points 20
19
Thermal Shock Resistance, points 12
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 17 to 19
18 to 20
Iron (Fe), % 65.4 to 74
55.7 to 62.7
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 12
19 to 21
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0 to 0.7
0.15 to 0.6