- Spring wire types
| Description | Tensile Strength | Symbol | Exterior |
|---|---|---|---|
| Austenite | AISI 302 (1.4310) | WPA WPB | Common spring type |
| AISI 304 (1.4301) | |||
| AISI 316 (1.4401) | |||
| AISI 631 (1.4568) | WPC | High elasticity heat pring type |
KS standard
| Linear diameter(mm) | A type(STS 302, 304, 316) | B type(STS 302, 304) | Remarks |
|---|---|---|---|
| Tensile strength (kgf/mm2) | Tensile strength (kgf/mm2) | ||
| 0.080~0.20 | 168~194 | 219~245 | |
| 0.23~0.40 | 163~189 | 209~235 | |
| 0.45~0.60 | 163~189 | 199~224 | |
| 0.65~1.00 | 156~182 | 189~214 | |
| 1.20~1.40 | 148~173 | 179~204 | |
| 1.60~2.00 | 143~168 | 168~194 | |
| 2.30~2.60 | 135~160 | 158~184 | |
| 2.90~4.00 | 126~151 | 148~173 | |
| 4.50~6.00 | 112~138 | 138~163 | |
| 6.50~8.00 | 102~128 | 130~155 |
ASTM standard
| Linear diameter(mm) | Tensile strength (kgf/mm2) | Linear diameter(mm) | Tensile strength (kgf/mm2) |
|---|---|---|---|
| ~0.229(0.009") | 229~250 | 1.601~1.778(0.070") | 177~198 |
| 0.230~0.254(0.010") | 225~246 | 1.779~1.905(0.075") | 176~195 |
| 0.254~0.279(0.011") | 224~245 | 1.906~2.032(0.080") | 173~193 |
| 0.280~0.305(0.012") | 222~243 | 2.033~2.210(0.087") | 170~191 |
| 0.306~0.330(0.013") | 221~242 | 2.211~2.413(0.095") | 167~188 |
| 0.331~0.356(0.014") | 219~240 | 2.414~2.667(0.105") | 163~184 |
| 0.357~0.381(0.015") | 218~239 | 2.668~2.921(0.115") | 160~181 |
| 0.382~0.406(0.016") | 217~238 | 2.922~3.175(0.125") | 156~178 |
| 0.407~0.432(0.017") | 215~236 | 3.176~3.429(0.135") | 153~174 |
| 0.433~0.457(0.018") | 214~235 | 3.430~3.759(0.148") | 148~169 |
| 0.458~0.508(0.020") | 211~232 | 3.760~4.115(0.162") | 144~165 |
| 0.509~0.559(0.022") | 208~229 | 4.116~4.496(0.177") | 139~160 |
| 0.560~0.610(0.024") | 205~226 | 4.497~4.877(0.192") | 136~158 |
| 0.611~0.660(0.026") | 205~225 | 4.878~5.258(0.207") | 132~155 |
| 0.661~0.711(0.028") | 203~224 | 5.259~5.715(0.225") | 128~150 |
| 0.712~0.787(0.031") | 200~221 | 5.716~6.350(0.250") | 123~144 |
| 0.788~0.864(0.034") | 198~218 | 6.351~7.061(0.278") | 118~139 |
| 0.865~0.940(0.037") | 197~217 | 7.062~7.772(0.306") | 113~135 |
| 0.941~1.041(0.041") | 193~214 | 7.773~8.407(0.331") | 109~131 |
| 1.042~1.143(0.045") | 191~211 | 8.408~9.195(0.362") | 105~127 |
| 1.144~1.270(0.050") | 188~207 | 9.196~10.008(0.394") | 102~123 |
| 1.271~1.372(0.054") | 186~206 | 10.009~11.125(0.438") | 98~120 |
| 1.373~1.473(0.058") | 184~203 | 11.126~12.700(0.500") | 95~116 |
| 1.474~1.600(0.063") | 181~200 | 12.701~ | 91~112 |
| Linear diameter(mm) | Hard allowable error(mm) | Average error(mm) | Remarks | ||
|---|---|---|---|---|---|
| Manufacturing practices | Desired value | Manufacturing practices | Desired value | ||
| 0.080~0.20 | ± 0.005 | - 0.004 | 0.005 below | 0.004 below | |
| 0.21~0.40 | ± 0.008 | - 0.006 | 0.008 below | 0.006 below | |
| 0.41~0.80 | ± 0.010 | - 0.008 | 0.010 below | 0.008 below | |
| 0.81~1.60 | ± 0.015 | - 0.013 | 0.015 below | 0.013 below | |
| 1.61~3.20 | ± 0.020 | - 0.015 | 0.020 below | 0.015 below | |
| 3.21~6.00 | ± 0.025 | - 0.020 | 0.025 below | 0.020 below | |
| 6.01~10.00 | ± 0.035 | - 0.030 | 0.035 below | 0.030 below | |
| 10.01~12.00 | ± 0.05 | - 0.040 | 0.05 below | 0.040 below | |
