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ASTM A227 Spring Steel vs. EN 1.4849 Stainless Steel

Both ASTM A227 spring steel and EN 1.4849 stainless steel are iron alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is EN 1.4849 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 500 to 640
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12
4.5
Fatigue Strength, MPa 900 to 1160
120
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
480
Tensile Strength: Yield (Proof), MPa 1430 to 1850
250

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 400
1020
Melting Completion (Liquidus), °C 1450
1390
Melting Onset (Solidus), °C 1410
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
12
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
42
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
7.1
Embodied Energy, MJ/kg 19
100
Embodied Water, L/kg 46
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
18
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 61 to 79
17
Strength to Weight: Bending, points 41 to 48
17
Thermal Diffusivity, mm2/s 14
3.2
Thermal Shock Resistance, points 55 to 71
11

Alloy Composition

Carbon (C), % 0.45 to 0.85
0.3 to 0.5
Chromium (Cr), % 0
18 to 21
Iron (Fe), % 97.4 to 99.1
32.6 to 43.5
Manganese (Mn), % 0.3 to 1.3
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
36 to 39
Niobium (Nb), % 0
1.2 to 1.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
1.0 to 2.5
Sulfur (S), % 0 to 0.050
0 to 0.030