Spring strip steel
Spring strip steel in an extensive program of stainless steels, precipitation hardening steels and nickel alloys, available in a wide range of sizes and with or without coating.
Sandvik's spring steel is normally supplied with a bright-rolled surface. Other types of surfaces, such as bright-annealed, dull, polished or ground surface can be offered on request. Sandvik's spring steel is delivered on spools, in coils, bundles and as lengths.
Materials for a large variety of springs
Sandvik's wide range of spring steel cover most requirements on material properties. This means that we can deliver strip steel for a wide range of spring applications, such as springs for electronic devices and mechanical springs.
Materials
Spring steel grades
The Sandvik program of spring steel includes the following materials. Other grades, such as martensitic chromium steel and carbon steel can be offered on request.
| Grade | UNS | ASTM | EN | Tensile strength MPa (ksi) | Width mm (in.) | Thickness mm (in.) |
|---|---|---|---|---|---|---|
| Sandvik 12R11 | (S30100) | (301) | 1.4310 | 800-1900 (116-276) |
2-345 (0.08-13.6) |
0.015-3 (0.0006-0.12) |
| Sandvik 11R51 | (S30100) | (301) | 1.4310 | 1700-2050 (247-297) |
2-345 (0.08-13.6) |
0.015- 1.5 (0.0006-0.06) |
| Sandvik 13RM19 | - | - | 1.4369 | 850-1600 (123-232) |
2-345 (0.08-13.6) |
0.015-3 (0.0006-.12) |
| Sandvik 3R12* | S30403 | 304L | 1.4306 | 600-1300 (87-189) |
2-325 (0.08-12.8) |
0.015-2 (0.0006-0.08) |
| Sandvik 2RK65 HV | N08904 | 904LVM | 1.4539 | * | * | * |
| Grade | UNS | ASTM | EN | Tensile strength MPa (ksi) | Width mm (in.) | Thickness mm (in.) |
|---|---|---|---|---|---|---|
| Sandvik SAF 2507 | S32750 | - | 1.4410 | 900-1600 (131-232) |
2-300 (0.08-11.8) |
0.015-3.5 (0.0006-0.14) |
| Sandvik Springflex |
|
- | 1.4462 | 1100-2200 (160-319) | 2-300 (0.079 - 12) | 0.03 - 3.51 (0.0012 - 0.14) |
| Grade | UNS | ASTM | EN | Tensile strength MPa (ksi) | Width mm (in.) | Thickness mm (in.) |
|---|---|---|---|---|---|---|
| Sandvik 9RU10 | S17700 | 631 | 1.4568 | 1200-1700 (174-247) |
2-360 (0.08-14.2) |
0.015-3 (0.0006-0.12) |
| Sandvik 1RK95 | S45500 | - | - | 1050-1500 (152-218) |
10-330 (0.39-13.0) |
1-3.5 (0.039-0.138) |
| Sandvik Nanoflex | - | - | - | 950-1850 (138-268) |
2-330 (0.08-13) |
0.015-2 (0.0006-0.08) |
| Sanicro 75X | N07750 | - | - | 750- 1350 (109-196) |
2-200 (0.08-7.9) |
0.015-4 (0.0006-0.16) |
| Grade | UNS | ASTM | EN | Tensile strength MPa (ksi) | Width mm (in.) | Thickness mm (in.) |
|---|---|---|---|---|---|---|
| Sanicro 75X | N07750 | - | - | 750- 1350 (109-196) |
2-200 (0.08-7.9) |
0.015-4 (0.0006-0.16) |
* Contact us for more information
Material properties
Spring steel properties
The tables show the properties of Sandvik's spring steel grades compared to the normally used ASTM 301.
The more plus signs, the better the properties:
| Property | + | ++ | +++ | ++++ | +++++ |
|---|---|---|---|---|---|
| Fatigue strength |
Sandvik 12R11 Sandvik 1RK95 |
Sandvik 9RU10 | Sandvik 11R51 |
||
| Formability | Sandvik 9RU10 | Sandvik 1RK95 | Sandvik Nanoflex | ||
| Non-magnetic | Sandvik 13RM19 | ||||
| Tensile strength (as delivered) |
Sandvik 12R11 | Sandvik 11R51 | |||
| Corrosion resistance |
Sandvik 12R11 Sandvik 9RU10 |
Sandvik 3R12 Sandvik Nanoflex Sandvik 11R51 |
Sandvik Bioline 316LVM Sandvik 2RK65 HV |
Sandvik SAF 2507 Sanicro 75X |
|
| Relaxation resistance | Sandvik 11R51 | Sandvik 9RU10 | Sandvik 1RK95 | Sandvik Nanoflex | |
| Elevated temperature | Sandvik 11R51 |
Sandvik Nanoflex Sandvik 1RK95 Sandvik 9RU10 |
Sanicro 75X |
Sizes
Sizes and tolerances
The Sandvik spring steel program covers the size ranges below. Standard dimensional tolerances is according to the standard EN 10088-1.
Sandvik's spring steel is normally supplied with a bright-rolled surface. Other types of surfaces, such as bright-annealed, dull, polished or ground surface can be offered on request.
| Thickness | Width | Thickness tolerance, mm +/- Tolerance class |
|||
|---|---|---|---|---|---|
| mm | mm | T1 | T2 | T3 | T4 |
| <0.025 | -250 >250-400 |
0.003 0.004 |
0.002 0.003 |
0.0015 0.002 |
0.001 0.0015 |
| 0.025- <0.04 | -250 >250-400 |
0.004 0.005 |
0.003 0.004 |
0.002 0.003 |
0.0015 0.002 |
| 0.04- <0.063 | -250 >250-400 |
0.005 0.006 |
0.004 0.005 |
0.003 0.004 |
0.002 0.003 |
| 0.063- <0.1 | -250 >250-400 |
0.006 0.007 |
0.005 0.006 |
0.004 0.005 |
0.003 0.004 |
| 0.1- <0.125 | -250 >250-400 |
0.007 0.008 |
0.005 0.006 |
0.004 0.005 |
0.003 0.004 |
| 0.125- <0.16 | -250 >250-400 |
0.009 0.01 |
0.006 0.007 |
0.005 0.006 |
0.004 0.005 |
| 0.16- <0.2 | -250 >250-400 |
0.01 0.011 |
0.007 0.008 |
0.005 0.006 |
0.004 0.005 |
| 0.2- <0.25 | -250 >250-400 >400-600 |
0.011 0.013 0.014 |
0.008 0.009 0.010 |
0.006 0.007 0.008 |
0.004 0.006 0.007 |
| 0.25- <0.315 | -250 >250-400 >400-600 |
0.013 0.015 0.017 |
0.009 0.011 0.012 |
0.007 0.008 0.009 |
0.005 0.006 0.007 |
| 0.315- <0.4 | -250 >250-400 >400-600 |
0.015 0.017 0.020 |
0.011 0.012 0.014 |
0.008 0.009 0.010 |
0.006 0.006 0.008 |
| 0.4- <0.5 | -250 >250-400 >400-600 |
0.017 0.020 0.023 |
0.012 0.014 0.017 |
0.009 0.010 0.012 |
0.006 0.007 0.009 |
| 0.5- <0.63 | -250 >250-400 >400-600 |
0.020 0.024 0.028 |
0.014 0.017 0.020 |
0.010 0.012 0.014 |
0.007 0.009 0.010 |
| 0.63- <0.8 | -250 >250-400 >400-600 |
0.023 0.027 0.032 |
0.017 0.020 0.023 |
0.012 0.014 0.016 |
0.008 0.010 0.012 |
| 0.8- <1 | -250 >250-400 >400-600 |
0.027 0.032 0.037 |
0.019 0.023 0.027 |
0.013 0.016 0.019 |
0.009 0.012 0.014 |
| 1- <1.25 | -250 >250-400 >400-600 |
0.034 0.036 0.042 |
0.024 0.026 0.029 |
0.017 0.018 0.021 |
0.012 0.013 0.015 |
| 1.25- <1.6 | -250 >250-400 >400-600 |
0.039 0.044 0.050 |
0.028 0.032 0.028 |
0.020 0.022 0.026 |
0.014 0.016 0.019 |
| 1.6- <2 | -250 >250-400 >400-600 |
0.046 0.050 0.060 |
0.033 0.038 0.042 |
0.023 0.026 0.029 |
0.017 0.019 0.021 |
| 2- <2.5 | -250 >250-400 >400-600 |
0.050 0.055 0.065 |
0.035 0.040 0.050 |
0.025 0.028 0.033 |
0.017 0.020 0.024 |
| 2.5- <3.15 | -250 >250-400 >400-600 |
0.056 0.060 0.070 |
0.040 0.043 0.050 |
0.028 0.030 0.035 |
0.020 0.022 0.025 |
| 3.15- 5 | -250 >250-400 >400-600 |
0.063 0.065 0.080 |
0.045 0.050 0.060 |
0.032 0.034 0.040 |
0.022 0.024 0.029 |
| Thickness | Width | Thickness tolerance, mm +/- Tolerance class |
|||
|---|---|---|---|---|---|
| mm | mm | B1 | B2 | B3 | B4 |
| <0.25 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.07 0.10 0.15 0.20 0.30 0.40 0.60 |
0.05 0.07 0.11 0.15 0.20 0.30 0.40 |
0.03 0.05 0.07 0.10 0.15 0.20 0.30 |
0.02 0.035 0.05 0.07 0.10 - - |
| 0.25- <0.50 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.10 0.15 0.20 0.25 0.35 0.50 0.70 |
0.07 0.11 0.15 0.20 0.30 0.35 0.50 |
0.05 0.07 0.10 0.15 0.20 0.25 0.35 |
0.03 0.05 0.07 0.10 0.15 - - |
| 0.50- <1.00 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.15 0.20 0.25 0.30 0.40 0.60 0.80 |
0.11 0.15 0.20 0.25 0.30 0.40 0.60 |
0.07 0.10 0.15 0.15 0.20 0.30 0.40 |
0.05 0.07 0.10 0.10 v15 - - |
| 1.00- <1.60 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.20 0.25 0.30 0.35 0.45 0.70 0.90 |
0.15 0.20 0.25 0.25 0.35 0.50 0.60 |
0.10 0.15 0.15 0.20 0.25 0.35 0.40 |
0.07 0.10 0.10 0.15 0.20 - - |
| 1.60- <2.00 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.25 0.30 0.35 0.40 0.50 0.70 0.90 |
0.20 0.20 0.30 0.30 0.35 0.50 0.60 |
0.15 0.15 0.20 0.20 0.25 0.35 0.40 |
0.10 0.10 0.15 0.15 0.20 - - |
| 2.00- <2.50 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
0.35 0.35 0.40 0.45 0.55 0.80 1.00 |
0.25 0.25 0.30 0.35 0.40 0.60 0.70 |
0.20 0.20 0.20 0.25 0.30 0.40 0.50 |
0.15 0.15 0.15 0.20 0.25 - - |
| 2.50- <4.00 | - <20 20- <50 50- <125 125- <250 250- <400 400- <600 600- <800 |
- 0.40 0.45 0.50 0.60 0.80 1.00 |
- 0.30 0.30 0.35 0.40 0.60 0.70 |
- 0.20 0.20 0.25 0.30 0.40 0.50 |
- 0.15 0.15 0.20 0.25 - - |
| Thickness | Width | Thickness tolerance, in. +/- Tolerance class |
|||
|---|---|---|---|---|---|
| in. | in. | T1 | T2 | T3 | T4 |
| -<.0010 | -9.8 >9.8- 15.7 |
.00012 .00016 |
.00008 .00012 |
.00006 .00008 |
.00004 .00006 |
| .0010- <.0016 | -9.8 >9.8- 15.7 |
.00016 .00020 |
.00012 .00016 |
.00008 .00012 |
.00006 .00008 |
| .0016- <.0025 | -9.8 >9.8- 15.7 |
.00020 .00024 |
.00016 .00020 |
.00012 .00016 |
.00008 .00012 |
| .0025- <.0039 | -9.8 >9.8- 15.7 |
.00024 .00028 |
.00020 .00024 |
.00016 .00020 |
.00012 .00016 |
| .0039- <.0049 | -9.8 >9.8- 15.7 |
.00028 .00031 |
.00020 .00024 |
.00016 .00020 |
.00012 .00016 |
| .0049- <.0063 | -9.8 >9.8- 15.7 |
.00035 .00039 |
.00024 .00028 |
.00020 .00024 |
.00016 .00020 |
| .0063- <.0079 | -9.8 >9.8- 15.7 |
.00039 .00043 |
.00028 .00031 |
.00020 .00024 |
.00016 .00020 |
| .0079- <.0098 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00043 .00051 .00055 |
.00031 .00035 .00039 |
.00024 .00028 .00031 |
.00016 .00024 .00028 |
| .0098- <.0124 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00051 .00059 .00067 |
.00035 .00043 .00047 |
.00028 .00031 .00035 |
.00020 .00024 .00028 |
| .0124- <.0157 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00059 .00067 .00079 |
.00043 .00047 .00055 |
.00031 .00035 .00039 |
.00024 .00024 .00031 |
| .0157- <.0197 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00067 .00079 .00091 |
.00047 .00055 .00067 |
.00035 .00039 .00047 |
.00024 .00028 .00035 |
| .0197- <.0248 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00079 .00094 .00110 |
.00055 .00067 .00079 |
.00039 .00047 .00055 |
.00028 .00035 .00039 |
| .0248- <.0315 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00091 .00106 .00126 |
.00067 .00079 .00091 |
.00047 .00055 .00063 |
.00031 .00039 .00047 |
| .0315- <.0394 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00106 .00126 .00146 |
.00075 .00091 .00106 |
.00051 .00063 .00075 |
.00035 .00047 .00055 |
| .0394- <.0492 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00134 .00142 .00165 |
.00094 .00102 .00114 |
.00067 .00071 .00083 |
.00047 .00051 .00059 |
| .0492- <.0630 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00153 .00173 .00197 |
.00110 .00126 .00150 |
.00079 .00087 .00102 |
.00055 .00063 .00075 |
| .0630- <.0787 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00181 .00197 .00236 |
.00130 .00150 .00165 |
.00091 .00102 .00114 |
.00067 .00075 .00083 |
| .0787- <.0984 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00197 .00216 .00256 |
.00138 .00157 .00197 |
.00098 .00110 .00130 |
.00067 .00079 .00094 |
| .0984- <1.240 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00220 .00236 .00276 |
.00157 .00169 .00197 |
.00110 .00018 .00138 |
.00079 .00087 .00098 |
| 1.240- <1.969 | -9.8 >9.8- 15.7 >15.7- 23.6 |
.00248 .00256 .00315 |
.00177 .00197 .00236 |
.00126 .00134 .00157 |
.00087 .00094 .00114 |
| Thickness | Width | Thickness tolerance, in. +/- Tolerance class |
|||
|---|---|---|---|---|---|
| in. | in. | B1 | B2 | B3 | B4 |
| - <.0098 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0028 .0039 .0059 .0079 .0118 .0157 .0236 |
.0020 .0028 .0043 .0059 .0079 .0118 .0157 |
.0012 .0020 .0028 .0039 .0059 .0079 .0118 |
.0008 .0014 .0020 .0028 .0039 - - |
| .0098- <.0197 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0039 .0059 .0079 .0098 .0138 .0197 .00276 |
.0028 .0043 .0059 .0079 .0118 .0138 .0197 |
.0020 .0028 .0039 .0059 .0079 .0098 .0138 |
.0012 .0020 .0028 .0039 .0059 - - |
| .0197- <.0394 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0059 .0079 .0098 .0118 .0157 .0236 .0315 |
.0043 .0059 .0079 .0098 .0118 .0157 .0236 |
.0028 .0039 .0059 .0059 .0079 .0118 .0157 |
.0020 .0028 .0039 .0039 .0059 - - |
| .0394- <.0630 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0079 .0098 .0118 .0138 .0177 .0276 .0354 |
.0059 .0079 .0098 .0098 .0138 .0197 .0236 |
.0039 .0059 .0059 .0079 .0098 .0138 .0157 |
.0028 .0039 .0039 .0059 .0079 - - |
| .0630- <.0787 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0098 .0118 .0138 .0157 .0197 .0276 .0354 |
.0079 .0079 .0118 .0118 .0138 .0197 .0236 |
.0059 .0059 .0079 .0079 .0098 .0138 .0157 |
.0039 .0039 .0059 .0059 .0079 - - |
| .0787- <.0984 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
.0138 .0138 .0157 .0177 .0217 .0315 .0394 |
.0098 .0098 .0118 .0138 .0157 .0236 .0276 |
.0079 .0079 .0079 .0098 .0118 .0157 .0197 |
.0059 .0059 .0059 .0079 .0098 - - |
| .0984- <.1575 | - <.79 .79- <1.97 1.97- <4.9 4.9- <9.8 9.8- <15.7 15.7- <23.6 23.6- <31.5 |
- .0157 .0177 .0197 .0236 .0315 .0394 |
- .0118 .0118 .0138 .0157 .0246 .0276 |
- .0079 .0079 .0098 .0118 .0157 .0197 |
- .0059 .0059 .0079 .0098 - - |
Tensile strength
Standard tensile strength
Sandvik's spring steel can be supplied with tensile strength according to the table. Contact us for information about tensile strength for other grades.
■ = stock standard
□ = available combination
| Thickness | Sandvik 12R11 | Sandvik 11R51 | Sandvik 9RU10 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| mm | Tensile strength (MPa) | Tensile strength (MPa) | Tensile strength (MPa) | ||||||
| 1300 | 1500 | 1700 | 1700 | 1900 | 2050 | 1300 | 1500 | 1700 | |
| 0.010 | - |
□
|
- | - | - | - | - | - | - |
| 0.015 | - |
□
|
□
|
□
|
□
|
□
|
- | - |
□
|
| 0.03 |
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
| 0.04 |
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
| 0.05 |
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
| 0.08 |
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
□
|
| 0.10 |
□
|
■
|
□
|
□
|
□
|
■
|
□
|
□
|
□
|
| 0.15 |
□
|
■
|
■
|
□
|
□
|
■
|
□
|
□
|
□
|
| 0.20 |
□
|
■
|
■
|
□
|
■
|
■
|
□
|
□
|
□
|
| 0.25 |
□
|
■
|
□
|
□
|
■
|
□
|
□
|
□
|
□
|
| 0.30 |
□
|
■
|
□
|
■
|
■
|
■
|
□
|
□
|
□
|
| 0.40 |
■
|
■
|
■
|
□
|
■
|
□
|
□
|
□
|
□
|
| 0.50 |
□
|
■
|
■
|
□
|
■
|
- |
□
|
□
|
- |
| 0.60 |
□
|
■
|
□
|
□
|
■
|
- |
□
|
□
|
- |
| 0.70 |
□
|
■
|
□
|
□
|
■
|
- |
□
|
□
|
- |
| 0.80 |
■
|
□
|
□
|
□
|
■
|
- |
□
|
■
|
- |
| 0.90 |
□
|
□
|
■
|
□
|
- | - |
□
|
□
|
- |
| 1.0 |
□
|
■
|
□
|
□
|
- | - |
□
|
□
|
- |
| 1.5 |
□
|
■
|
□
|
□
|
- | - |
□
|
□
|
- |
| 2.0 |
□
|
□
|
- | - | - | - |
■
|
- | - |
| 2.5 |
□
|
- | - | - | - | - |
□
|
- | - |
| 3.0 | - | - | - | - | - | - |
■
|
- | - |
Applications
Spring steel applications
Sandvik's wide range of spring strip steel covers most requirements on material properties. This means that we can deliver strip steel for a wide range of spring applications, such as:
- Brake springs
- Brush springs
- Cage clamp springs
- Contact springs
- Diaphragms
- Disc springs
- Dome springs
- Hinge springs
- Non-magnetic springs
- Springs for electric and electronic components and appliances
- Springs for motorized tools and compressors
- Springs for nuclear applications
