STAINLESS STEEL ROUND WIRE FOR SPRING HARD QUALITY & FORMING QUALITY WIRE

SPRING WIRES

Ambica Stainless Steel Wire for Springs are manufactured having excellent mechanical properties (surface, cast & helix) manufactured under strict guidance of technical personnel. The diameter ranges from 0.15 mm to 1.20 mm in bright finish and 0.50 mm to 6.0mm in matt finish (coated) in grade of AISI 302, 304 & 316, 321, Standard ASTM A313 and others.

ROPE WIRES

Ambica Stainless Steel Wire for Rope Wires are manufactured having excellent mechanical properties, under strict guidance of technical personnel. The diameter ranges from 0.14 mm to 1.20mm in bright finish and 0.50 mm to 6.00 mm in matt finish (de-coated) in grade of AISI 304, 316, 321 rope specs.

STAINLESS STEEL WIRE FOR SPRINGS HAS FOLLOWING CHARACTERISTICS

• Excellent Surface Finish
• High Corrosion Resistance
• Superior Coiling Efficiency
• High Fatigue Strength

Stainless Steel Wire for Spring is made from the selected steel. In particular to provide optimum spring efficiency, this type of wire is meticulously finished to eliminate flaws.

OVALITY OF THE WIRE

The arithmetic difference between the two measurements of the diameter shall be not more than half the tolerance specified in table 1

Nominal Dia of wire d	Tolerance on diameter
mm	mm
0.2 < d < 0.4	+-0.01
0.4 < d < 0.6	+- 0.015
0.8 < d < 0.1	+- 0.02
1 < d < 6	+- 0.02
1.6 < d < 2.4	+- 0.03
2.4 < d < 3.7	+- 0.03
3.7 < d < 5.2	+-0.04
5.2 < d < 6	+-0.05

Note: Other tensile grades may be used on agreement between the manufacturer and the supplier

TENSILE GRADES

Table 2 – Tolerances on tensile grade

Nominal Dia of wire d	Tolerance on tensile grade
mm	mm
0.2 < d < 0.5	390
0.5 < d < 1	350
1 < d < 1.5	320
1.5 < d < 2	290
2 < d	260

The tensile grades of wires are:
• 1570 N/mm2 for wires of all qualities
• 1770 N/mm2 for bright wires quality B
• 1960 N/mm2 for bright wires quality B
These nominal values are lower limits of strength.
The upper limits are equal to the lower limits in addition to the tolerance specified in table 2.

REVERSE BEND STRENGTH

This test applies only to wire of nominal diameter between 0.5 mm inclusive and 3.7 mm inclusive. For wires of nominal diameter less than 0.5 mm, the wire shall withstand without breaking the minimum number of reverse bends specified in table 3 for the appropriate diameter, tensile grade and finish. The radius of curvature for the supports for the various wire diameters is also given. If the tensile grade of a wire lies between two tensile grades given in Table 3, then the number of reverse bends for the next upper tensile grade shall be chosen. Note: The reverse bend test is not mandatory for wires to correspond with this international standard

MECHANICAL PROPERTIES

CAST AND HELIX(PITCH)

Nominal dia of wire d (mm)	Radius of Curvature of Supports (mm)	Minimum of reverse bends
		Quality B			Quality A
		Tensile grade
	1570	1770	1960	1960
0.5 < d < 0.55	1.75	15	14	13	-
0.55 < d < 0.6		14	13	12	-
0.6 < d < 0.65		12	11	10	-
0.65 < d < 0.7		11	10	9	-
0.7 < d < 0.75	2.5	15	14	13	12
0.75 < d < 0.8	2.5	14	13	12	11
0.8 < d < 0.85	2.5	13	12	11	10
0.85 < d < 0.9		11	10	9	8
0.9 < d < 0.95		10	9	8	7
0.95 < d < 1		10	9	8	7
1 < d < 1.1	3.75	15	14	13	12
1.1 < d < 1.2		13	12	11	10
1.2 < d < 1.3		12	11	10	9
1.3 < d < 1.4		10	9	8	7
1.4 < d < 1.5		9	8	7	6
1.5 < d < 1.6	5	12	11	10	9
1.6 < d < 1.7		11	10	9	8
1.7 < d < 1.8		10	9	8	7
1.7 < d < 1.9		9	8	7	6
1.9 < d < 2		8	7	6	5
2 < d < 2.1	7.5	13	12	11	10
2.1 < d < 2.2		12	11	10	9
2.2 < d < 2.3		11	10	9	8
2.4 < d < 2.5		10	9	8	7
2.5 < d < 2.6		9	8	7	6
2.6 < d < 2.7		8	7	6	5
2.7 < d < 3		7	6	5	4
3 < d < 3.1	10	11	10	9	8
3.1 < d < 3.2		10	9	8	7
3.2 < d < 3.3		9	8	7	6
3.3 < d < 3.4		9	8	7	6
3.4 < d < 3.5		8	7	6	5
3.5 < d < 3.6		7	6	5	4
3.6 < d < 3.7		7	6	5	4

PACKING (COIL WT AND COIL DIA FOR HARD WIRES)

Full Hard Kgs
From	To	ID”	OD”	Coil Wt Max
0.40	0.85	8	16	30
0.90	1.40	14	22	60
1.50	6.00	18	30	250