Galvanized Hard Drawn MB Wire

ASTM A764
Standard Specification for Metallic Coated Carbon Steel Wire, Coated at Size and Drawn to Size for Mechanical Springs

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.

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

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.

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