Stainless steel wire for springs

Our stainless steel spring wire is produced using the cutting-edge manufacturing technologies we have accrued over many years, and is suitable to a variety of applications.

General JIS Grade

Suzuki-Sumiden stainless steel spring wire is made with the advanced manufacturing technology that we have cultivated over many years. Although our primary focus is on springs for automobile parts, we also make spring wire for office automation and communication equipment, and even household goods such as hairpins. Our stainless steel wire is used as a spring material in many fields, earning high marks for quality and reliability.

Steel grade SUS302, SUS304, SUS304N1, SUS316 SUS302, SUS304, SUS304N1 SUS631J1*1
Tempering Type A (-WPB) Type B (-WPB) Type C (-WPC)
Wire diameter [mm] Tensile strength [N/mm2]
0.080〜0.090 1650〜1900 2150〜2400 -
0.10〜0.20 1950〜2200
0.23〜0.40 1600〜1850 2050〜2300 1930〜2180
0.45〜0.60 1950〜2200 1850〜2100
0.65〜1.00 1530〜1780 1850〜2100 1800〜2050
1.20〜1.40 1450〜1700 1750〜2000 1700〜1950
1.60〜2.00 1400〜1650 1650〜1900 1600〜1850
2.30〜2.60 1320〜1570 1550〜1800 1500〜1750
2.90〜4.00 1230〜1480 1450〜1700 1400〜1650
4.50〜6.00 1100〜1350 1350〜1600 1300〜1550
6.50〜8.00 1000〜1250 1270〜1520 -
9.00 - 1130〜1380
10.00 980〜1230
12.00 880〜1130
*1
According to the agreement between the parties to deliver, the tensile strength of a test specimen of SUS631J1-WPC wire should be more than 250 N/mm2 after precipitation hardening heat treatment (470°C ±10°C, air cooling after heating for one hour).
Remarks 1.
Wire diameter in the middle should be larger than the specified value.
Remarks 2.
Variation in tensile strength from one coil to another should, in principle, be within 1/2 of the range in the above table.
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.

High strength

We achieve tensile strength higher than SUS304-WPB, which is representative of typical stainless steel spring wire, and offer a lineup that meets the diverse needs of our customers.

EX-SUS

This is a high strength stainless steel wire with strength equivalent to type A piano wire before tempering, and to type B piano wire after adjustment for tempering.
Various grades of wire can be processed into springs, from lower strength wire (offering advantages in workability) to high strength wire (with advantages in spring characteristics and durability). We also employ a wide range of tempering temperatures, according to the intended application.

Product symbol Wire diameter [mm] Tensile strength [N/mm2]
EX-SUS 0.10〜0.12 2700〜3000
0.14 2650〜2950
0.16 2600〜2900
0.18〜0.20 2550〜2850
0.23 2500〜2800
0.26 2450〜2750
0.29 2400〜2700
0.32〜0.35 2350〜2650
0.40 2300〜2600
0.45〜0.50 2250〜2550
0.55 2200〜2450
0.60〜0.65 2150〜2400
0.70 2100〜2350
0.80〜0.90 2050〜2300
1.00 2000〜2250
1.20 1950〜2200
1.40 1900〜2150
1.60 1850〜2100
1.80 1800〜2050
2.00 1750〜2000
2.30〜2.60 1700〜1950
2.90 1650〜1900
3.20〜1850 1600〜1810
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.

Super Dolce

This is a high strength stainless steel wire with tensile strength and high temperature applicability equivalent to SUS631WPC through tempering at 500°C for 20 minutes. It also delivers corrosion resistance equal to or higher than SUS316 standards.

Product symbol Wire diameter [mm] Tensile strength [N/mm2]
Before tempering After tempering
Super Dolce 0.50〜1.00 1850〜2100 2200〜2450
1.20〜1.40 1750〜2000 2100〜2350
1.60〜2.30 1700〜1905 2000〜2250
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.

CRYO-S

This is a high strength stainless steel wire made through our exclusive processing methodology, offering high tensile strength regardless of wire diameter. In particular, it delivers exceptionally high strength at thicker wire diameters of 2.00 or more.

Product symbol Wire diameter [mm] Tensile strength [N/mm2]
CRYO-S 0.80〜4.20 1960〜2210
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Please inquire about our ability to manufacture other sizes or for more detailed specifications.

High corrosion resistance

SSS170

With pitting and crevice corrosion resistance of more than SUS316 and SUS317L, this stainless steel wire can be used in a variety of corrosive environments. It offers excellent resistance to sulfuric and hydrochloric acids, including higher concentrations and temperatures than can be attained with SUS316. Its mechanical properties are equivalent to SUS304-WPB.

Product symbol Wire diameter [mm] Tensile strength [N/mm2]
SSS170 0.50〜0.60 1950〜2200
0.65〜1.00 1850〜2100
1.20〜1.40 1750〜2000
1.60〜2.00 1650〜1900
2.30 1550〜1800
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.

Super Dolce

This is a highly corrosion resistant stainless steel wire with resistance equal to or higher than SUS316. With tempering (500°C x 20 minutes), it can deliver tensile strength and high temperature performance equivalent to SUS631WPC.

Product symbol Wire diameter [mm] Tensile strength [N/mm2]
Before tempering After tempering
Super Dolce 0.50〜1.00 1850〜2100 2200〜2450
1.20〜1.40 1750〜2000 2100〜2350
1.60〜2.30 1700〜1905 2000〜2250
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.

Nonmagnetic

SSS130M

SSS130M is a super nonmagnetic stainless steel wire with magnetic permeability of less than 1.01, even after extensive processing. Typically, austenitic stainless steel wire used for springs has magnetism when worked cold, but this product removes those limitations.

Product symbol Wire diameter [mm] Tensile strength [N/mm2] Permeability [µ]
SSS130M 1.00〜4.20 (less than) 1960〜2210 less than 1.01
4.20〜6.65 1760〜2010 less than 1.01
*
Please inquire about our ability to manufacture other sizes or for more detailed specifications.