GOST 9389-75 Spring Wire

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Spring wire is produced to ensure manufacturing of springs that have been coiled under cold conditions and are not exposed to hardening process. The wire is produced of steel grade 50-85. According to the manufacturing accuracy the wire is produced of two types: regular and upgrade. The wire is made of marks A,Б,В of class 1,2,3 depending on mechanical characteristics. Wire is delivered in bundles of 20-100 kg. It may be delivered in soft or hard package.

Mechanical Properties.

Diameter, mm	Point of maximum load, N/mm2 (kgf/ mm2)			Variation in a lot, kgf/ mm2, not more than
	Class			Mark A	Mark Б	Mark B
	1	2	3	1	1,2,3	1	2	3
				Class
1	2	3	4	5	6	7	8	9
0.50			“		27	“	“	“
0.60			“		24	“	“	“
0.63			170-220		“	“	40	“
0.70			“		“	“35	“	“
0.80			170-215		23	30	45	45
0.90			165-205		23	“	40	50
1.0			160-210		22	“	“	“
1.2			155-200		21	30	“	45
1.4	230-260	195-230	150-195		20	“	35	45
1.6	220-250	190-220	145-190		20	25	30	45
2.2	195-220	170-195	135-170		“	“	25	35
2.5	185-210	165-190	130-165		“	“	“	“
2.8	180-205	“	“		“	“	“	“
3.0	175-200	“	“		“	“	“	“
3.6	170-195	180-155	125-155		-	-	“	30
4.0	-	150-175	120-150		-	-	-	-
8.0	-	125-145	105-125		-	-	-	-

Diameter, mm	Number of twisting not less than
	Mark A, Б			Mark B
	1	2	3	1	2	3
	Class
10	11	12	13	14	16	16
0.50			20	16	19	19
0.60			“	“	18	18
0.63			“	“	“	“
0.70			“	“	“	“
0.80			20	16	17	17
0.90			“	“	“	“
1.0			“	“	“	“
1.2			“	“	“	“
1.4	20	20	20	16	17	17
1.6	“	“	“	“	“	“
2.2	15	15	15	13	15	15
2.5	“	“	“	12	“	“
2.8	“	“	“	11	14	14
3.0	“	“	‘”	10	13	13
3.6	“	“	“	7	13	13
4.0	-	13	13
8.0	-	-	-	-	-	-