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 covers 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
Materials
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* |
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|
- |
| Sandvik 2RK66 | N08904 | '904L' | 1.4539 | 1.4539 |
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|
- |
| Sandvik Nanoflex | S46910 | - | - | - |
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|
■
|
| Sandvik Springflex SF | S31803 | - | 1.4462 | 1.4462 | ■ | - |
| Sandvik Springflex SH | S31803 | - | 1.4462 HS | 1.4462 |
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|
- |
| Sandvik Springflex | S31803 | - | 1.4462 NS | 1.4462 |
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|
■
|
| Sandvik 13RM19 | - | - | - | 1.4369 |
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|
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|
| Sandvik 5R60 | S31600 | 316 | 1.4436 | 1.4436 | - |
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|
| Sandvik 5R62 | S31600 | 316 | 1.4401 | 1.4401 |
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|
- |
| Sandvik T302HS | S30200/S30400 | 302/304 | 1.4310 HS | 1.4310 |
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|
- |
| Sandvik 11R51 | S30151 | 302 | 1.4310 HS | 1.4310 |
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|
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|
| Sandvik 5R10 | S30400/S30409 | 304 | 1.4301 | 1.4301 | - |
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|
| Sandvik T302 | S30200/S30400 | 302/304 | 1.4310 NS | 1.4310 |
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|
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| Sandvik 12R10L | S30200 | 302 | 1.4310 NS | 1.4310 |
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| Sandvik 12R10 | S30200 | 302 | 1.4310 NS | 1.4310 |
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|
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| Sandvik 11RM20 | S20100 | 201 | - | 1.4372 | - |
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| Sandvik 11RM10 | S20100 | 201 | - | 1.4372 | - |
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|
* Not covered by the standard EN 10088-3.
Material properties
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 |
Sizes
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, 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
Delivery forms for spring wire
Round spring wire
Sandvik round spring wire can be supplied in the following delivery forms.
| 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.
| 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 bakelite 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
