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ASTM A227 Spring Steel vs. AISI 334 Stainless Steel

Both ASTM A227 spring steel and AISI 334 stainless steel are iron alloys. They have 60% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is AISI 334 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12
34
Fatigue Strength, MPa 900 to 1160
150
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 1030 to 1330
360
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
540
Tensile Strength: Yield (Proof), MPa 1430 to 1850
190

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1000
Melting Completion (Liquidus), °C 1450
1410
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
22
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
4.1
Embodied Energy, MJ/kg 19
59
Embodied Water, L/kg 46
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 61 to 79
19
Strength to Weight: Bending, points 41 to 48
19
Thermal Shock Resistance, points 55 to 71
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.45 to 0.85
0 to 0.080
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 97.4 to 99.1
55.7 to 62.7
Manganese (Mn), % 0.3 to 1.3
0 to 1.0
Nickel (Ni), % 0
19 to 21
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6