Sandvik Materials Technology is a developer and producer of advanced stainless steels, special alloys, titanium and other high-performance materials

Round and flat spring wire

Round spring wire and flat spring wire in an extensive program of stainless steels and nickel alloys, available in a wide range of sizes. Sandvik stainless steel spring wire is hard drawn and delivered in bright-drawn, polished or in coated condition (including nickel-coated surface).

Delivery forms available are different types of spools/coils and straightened lengths.

Materials for all types of springs
Sandvik's wide range of stainless steel spring wire cover most requirements on material properties. This means that we can deliver stainless wire for practically all types of springs, such as:

  • Compression springs
  • Formed springs (bent parts)
  • Tension springs
  • Torsion springs

Spring wire materials

The Sandvik program of round spring wire and flat spring wire includes the following stainless steels and nickel alloys.

Other grades can be offered on request.

Sandvik grade UNS ASTM 313 EN 10270-3 EN 10088-3
Round
Flat
Sanicro 75X N07750 - - 2.4669*
-
Sandvik 2RK66 N08904 '904L' 1.4539 1.4539
-
Sandvik Nanoflex S46910 - - -
Sandvik Springlex SF S31803 - 1.4462 1.4462 -
Sandvik Springlex SH S31803 - 1.4462 HS 1.4462
-
Sandvik Springflex S31803 - 1.4462 NS 1.4462
Sandvik 13RM19 - - - 1.4369
Sandvik 5R60 S31600 316 1.4436 1.4436 -
Sandvik 5R62 S31600 316 1.4401 1.4401
-
Sandvik T302HS S30200/S30400 302/304 1.4310 HS 1.4310
-
Sandvik 11R51 S30151 302 1.4310 HS 1.4310
Sandvik 5R10 S30400/S30409 304 1.4301 1.4301 -
Sandvik T302 S30200/S30400 302/304 1.4310 NS 1.4310
Sandvik 12R10L S30200 302 1.4310 NS 1.4310
Sandvik 12R10 S30200 302 1.4310 NS 1.4310
Sandvik 11RM20 S20100 201 - 1.4372 -
Sandvik 11RM10 S20100 201 - 1.4372 -

* Not covered by the standard EN 10088-3.

Spring wire properties

The table shows the properties of Sandvik's stainless spring wire grades compared to the commonly used UNS S30200 (Sandvik 12R10).

The more plus signs the better the properties:

Property + ++ +++ ++++ +++++
Fatigue strength


Sandvik 11R51
Sandvik Springflex
Formability vs. final strength Sandvik Springflex Sandvik Nanoflex
Non-magnetic properties Sandvik 5R60
Sandvik 5R62
Sandvik 2RK66 Sandvik 13RM19
Tensile strength as-delivered Sandvik 11R51 Sandvik Springflex SH
Corrosion resistance Sandvik 11R51 Sandvik Nanoflex Sandvik 5R60
Sandvik 5R62
Sandvik Springflex SH
Sandvik Springflex
Sandvik 2RK66
Relaxation resistance Sandvik Springflex
Sandvik 11R51
Sandvik Springflex SH Sandvik Nanoflex
Tempering effect Sandvik 11R51 Sandvik Springflex Sandvik Springflex SH Sandvik Nanoflex
Elevated temperature Sandvik Springflex SH
Sandvik Springflex
Sandvik 11R51
Sandvik Nanoflex Sanicro 75X

Spring wire sizes

Round spring wire

Sandvik round spring wire can be supplied in the following grades and size ranges. Standard dimensional tolerances, ovality, cast and helix are according to the standard EN 10270-3. Sandvik spring wire can be supplied bright drawn, polished or in coated condition (including nickel-coated surface), depending on grade and size.

Sandvik grade UNS Size range, mm Size range, in.
Sanicro 75X N07750 0.40 – 5.00 0.0157 – 0.1968
Sandvik Nanoflex S46910 0.15 – 6.00 0.0059 – 0.2362
Sandvik 2RK66 N08904 0.15 – 4.00 0.0059 – 0.1575
Sandvik Springlex SH S31803 0.20 – 3.00 0.0079 – 0.1181
Sandvik Springflex S31803 0.15 – 8.50 0.0059 – 0.3344
Sandvik 13RM19 - 0.40 – 3.20 0.0157 – 0.1260
Sandvik Santex - 0.15 – 1.50 0.0059 – 0.0590
Sandvik 5R60 S31600 0.20 – 8.00 0.0079 – 0.3150
Sandvik 5R62 S31600 0.20 – 8.00 0.0079 – 0.3150
Sandvik T302HS S30200/S30400 0.20 – 8.50 0.0079 – 0.3344
Sandvik 11R51 S30151 0.20 – 8.50 0.0079 – 0.3344
Sandvik 5R10 S30400/S30409 0.20 – 8.00 0.0079 – 0.3150
Sandvik T302 S30200/S30400 0.20 – 10.00 0.0079 – 0.3937
Sandvik 121R10L S30200 0.15 – 10.00 0.0059 – 0.3937
Sandvik 12R10 S30200 0.15 – 8.50 0.0059 – 0.3344
Sandvik 11RM20 S2010075 0.20 – 5.00 0.0079 – 0.1968
Sandvik 11RM10 S2010075 0.20 – 5.00 0.0079 – 0.1968

Flat spring wire

Sandvik flat spring wire can be supplied in the following size ranges.

Round edges Sharp edges
Min.
Max.
Min.
Max.
Width
0.25 mm
7.00 mm
1.20 mm
7.00 mm
Thickness
0.10 mm
3.00 mm
0.30 mm
3.00 mm
Width/thickness ratio
Width, mm
Min. ratio, mm
Max. ratio, mm
0.25–5.00
1.20
20.00
> 5.00–6.00
1.20
15.00
> 6.00–7.00
1.20
12.00

Delivery forms for spring wire

Round spring wire

Sandvik round spring wire can be supplied in the following delivery forms.

Spools and coils
Type of spool/coil Wire diameter, mm Wire weight, kg Size of spool/coil, mm
Gusab Compact coil 1.8–5.5 1000–1400 OD 950, ID 600, H 610
Gusab Compact coil 1.8–5.5 Max. 500 OD 950, ID 600, H 250
Sandvik Compact coil 1.8–4.0 Max. 1000 OD 650, ID 365, H 505
Spool 67
Oneway metallic spool
0.4–3.6 Max. 450 OD 760, ID 430, H 400
Spool17
Returnable metallic spool
0.4–4.0 250–400,
depending on wire size
OD 750, ID 406, W 285
Coil 0.9–10 40–350,
depending on wire size
OD 500-800, ID 375–600, H 150–300
Spool 16
Returnable metallic spool
0.4–4.0 Max. 150 OD 560, ID 336, W 274
Spool 28
Oneway plastic spool
0.15–1.2 Max. 40 OD 460, ID 305, W 105
Spool 23
Oneway metallic spool
0.15–0.40 Max. 15 OD 390, ID 305, W 89

OD = Outside diameter, ID = Inside diameter, H = Height, W = Width

Straightened lengths

Wire in diameter 0.6-10 mm can be delivered in lengths between 150 and 5000 mm, depending on wire size.

Flat spring wire

Sandvik flat spring wire can be supplied in the following delivery forms.

Spools and coils
Type of spool/coil Wire width, mm Wire weight, kg Size of spool/coil, mm
Spool 59
Oneway wooden spool
>3 300–350 OD 750, ID 490, W 340,
center hole 400
Spool 36
Returnable bakalite spool
>2 190–250 OD 750, ID 460, W 288,
center hole 60
Spool 24
Returnable wooden spool
>2 190–250 OD 750, ID 490, W 288,
center hole 60
Spool 41
Oneway wooden spool
>2 100–160 OD 750, ID 490, W 190,
center hole 400
Spool 30
Oneway wooden spool
>1.80 90–160 OD 620, ID 420, W 240,
center hole 355
Spool 29
Oneway plastic spool
<3 70–90 OD 400, ID 200, W 236,
center hole 56
Spool 28
Oneway plastic spool
<3 30–40 OD 460, ID 315, W 105,
center hole 305
Spool 25
Oneway wooden spool
<3 70–80 OD 630, ID 400, W 132,
center hole 300
Spool 11
Oneway plastic spool
<2 10–15 OD 300, ID 200, W 102,
center hole 52
Spool 14
Oneway plastic spool
<2 30–40 OD 355, ID 224, W 200, center hole 102
Spool 21
Oneway wooden spool
<3 100–130 OD 750, ID 490, W 190,
center hole 305
Spool 8
Oneway plastic spool
<2 9 OD 200, ID 100, W 113,
center hole 46
Spool 7
Oneway plastic spool
<2 7 OD 160, ID 100, W 160,
center hole 22

OD = Outside diameter, ID = Inside diameter, H = Height, W = Width

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