Standard:
ASTM A764
Standard Specification for Metallic Coated Carbon Steel Wire, Coated at Size and Drawn to Size for Mechanical Springs
Chemistry
Element | Composition, % |
---|---|
Carbon | 0.45-0.85 |
Manganese | 0.30-1.30 |
Phosphorus, max | 0.040 |
Sulfur, max | 0.050 |
Silicon | 0.10-0.35 |
Tensile Requirements - Finish 1
Finish 1 (Drawn to Size Metallic Coated), Regular or Class 1 Coating (One Class on Coating Type A)
Diameter (Inch) | Class I - Tensile Strength KSI Min | Class I - Tensile Strength KSI Max | Class II - Tensile Strength KSI Min | Class II - Tensile Strength KSI Max |
---|---|---|---|---|
0.032 | 253 | 306 | 292 | 347 |
0.035 | 248 | 301 | 287 | 342 |
0.041 | 242 | 293 | 279 | 332 |
0.048 | 236 | 286 | 273 | 325 |
0.054 | 231 | 279 | 266 | 316 |
0.062 | 225 | 272 | 259 | 308 |
0.072 | 220 | 266 | 254 | 301 |
0.080 | 216 | 261 | 249 | 296 |
0.092 | 209 | 253 | 241 | 287 |
0.106 | 205 | 248 | 237 | 281 |
0.120 | 200 | 241 | 230 | 273 |
0.135 | 196 | 237 | 226 | 269 |
0.148 | 193 | 234 | 223 | 266 |
Tensile strength values for intermediate diameters may be interpolated.
Permissible Variations in Dimensions Finish 1, Drawn to Size Metallic Coated
Diameter (Inch) | Permissible Plus and Minus | Permissible Out of Round |
---|---|---|
0.032 to under 0.076 | 0.001 | 0.001 |
0.076 to 0.148 incl. | 0.002 | 0.002 |
Tensile Requirements - Finish 2
Finish 2 (Drawn at Size Metallic Coated), Regular or Class 3 Coating (One Class on Coating Type A)
Diameter (Inch) | Class I - Tensile Strength KSI Min | Class I - Tensile Strength KSI Max | Class II - Tensile Strength KSI Min | Class II - Tensile Strength KSI Max |
---|---|---|---|---|
0.062 | 213 | 272 | 232 | 291 |
0.072 | 209 | 266 | 227 | 284 |
0.080 | 204 | 261 | 223 | 280 |
0.092 | 198 | 253 | 216 | 271 |
0.106 | 194 | 248 | 212 | 266 |
0.120 | 189 | 241 | 206 | 258 |
0.135 | 185 | 237 | 202 | 254 |
0.148 | 183 | 234 | 200 | 251 |
0.162 | 180 | 230 | 196 | 246 |
0.177 | 176 | 225 | 192 | 241 |
0.192 | 173 | 221 | 189 | 237 |
0.207 | 171 | 218 | 186 | 233 |
0.225 | 167 | 214 | 183 | 230 |
0.250 | 164 | 210 | 179 | 225 |
Tensile strength values for intermediate diameters may be interpolated.
Permissible Variations in Dimensions Finish 2, Metallic Coated at Size
Diameter (Inch) | Regular and Class I coating | Class 3 coating |
---|---|---|
0.062 to under 0.076 | 0.002 | 0.002 |
0.076 to 0.250 incl. | 0.003 | 0.004 |