Static load,  The spring is subjected to a constant load, or a load that varies but the design stress does not exceed 0.1
times the fatigue strength, or the design stress exceeds 0.1 times the fatigue strength but the number of cycles is less
than 10,000 times.

Dynamic Load, The spring is subjected to a design stress greater than 0.1 times the fatigue strength, with varying
loads and a number of load changes not less than 10,000 times.

Type

Tensile

GB/T4357-2022

EN10270-1

JIS G

ASTM

Application

Static Load

low tensile

SL

SL

JIS G3521 (SWA)

Tension,compression or torision spring,which are predominantly subjected to low static stress

Medium tensile

SM

SM

JIS G3521 (SWB)

A227

Tension, pressure or torsion spring, medium and high static load, or very little dynamic load stress

High tensile

SH

SH

JIS G3521 (SWC)

A227

Tension, compression or torsion spring, medium and high static load, wire forming that requires severe bending

Dynamic Load

Medium tensile

DM

DM

JIS G3522 (SWP-A)

A228

Tension, pressure or torsion spring, high static load, or mild dynamic load

High tensile

DH

DH

JIS G3522 (SWP-B)

A228

Tension, compression or torsion spring, or wire forming, to withstand high static load or medium dynamic load

Grade

Chemical analysis of wire rod

C

Si

Mn

P⩽

S⩽

Cu⩽

SL,SM,SH

0.35-1.00

0.10-0.37

0.30-1.20

0.030

0.030

0.20

DH,DM

0.45-1.00

0.10-0.37

0.30-1.20

0.020

0.025

0.12

The relatively broad range of carbon content is allowed to accommodate different requirements and wire steel
processes, and the carbon content range should be narrower in specific applications.

Through negotiation between the supplier and the buyer, the manganese content can be adjusted appropriately.

According to JIS G 3522

Mainly suitable for high quality spring with dynamic load

Dia.

Tensile  N/mm2

mm

SWP-A

SWP-B

SWP-V

0.12

2750-3040

3040-3330

0.14

2700-2990

2990-3290

0.16

2650-2940

2940-3240

0.18

2600-2890

2890-3190

0.20

2600-2840

2840-3090

0.23

2550-2790

2790-3040

0.26

2500-2750

2750-2990

0.29

2450-2700

2700-2940

0.35

2400-2650

2650-2890

0.40

2350-2600

2600-2840

0.45

2300-2550

2550-2790

0.50

2300-2550

2550-2790

0.55

2260-2500

2500-2750

0.60

2210-2450

2450-2700

0.65

2210-2450

2450-2700

0.70

2160-2400

2400-2650

0.80

2110-2350

2350-2600

0.90

2110-2300

2300-2500

1.00

2060-2260

2260-2450

2010-2210

1.20

2010-2210

2210-2400

1960-2160

1.40

1960-2160

2160-2350

1910-2110

1.60

1910-2110

2110-2300

1860-2060

1.80

1860-2060

2060-2260

1810-2010

2.00

1810-2010

2010-2210

1770-1910

2.30

1770-1960

1960-2160

1720-1860

2.60

1770-1960

1960-2160

1720-1860

2.90

1720-1910

1910-2110

1720-1860

3.20

1670-1860

1860-2060

1670-1810

3.50

1670-1810

1810-1960

1670-1810

4.00

1670-1810

1810-1960

1670-1810

4.50

1620-1770

1770-1910

1620-1770

5.00

1620-1770

1770-1910

1620-1770

Material

High Carbon Steel Raw

Size

1.30mm-6.30mm

Cross-section

Round,Shaped

Surface

Phosphated,Galvanized & Zn-Al

Apprication

For cold rolling of Trapezoidal wire for die spring

Specification

GB/T4357-2022, JIS G3521,JIS G3522,EN 10270-2,etc.

Material

High Carbon Steel Raw

Size

0.30mm-1.50mm

Cross-section

Round,Shaped

Surface

Phosphated,Galvanized & Zn-Al, Copper plated

Apprication

Automotive oil seal,seat,pull-push cable,interror,etc.

Specification

GB/T4357-2022, JIS G3521,JIS G3522,EN 10270-2,etc.

Material

High Carbon Steel Raw

Size

0.70mm-1.00mm

Cross-section

Round

Surface

Phosphated,Galvanized & Zn-Al

Apprication

Machanical spring

Specification

GB/T4357-2022, JIS G3521,JIS G3522,EN 10270-2,etc.

Material

High Carbon Steel Raw

Size

0.2mm-0.60mm

Cross-section

Round

Surface

Phosphated,Galvanized & Zn-Al

Apprication

Oil seal spring

Specification

GB/T4357-2022, JIS G3521,JIS G3522,EN 10270-2,etc.

Specification

Wire Dia.

Unit weight

Pitch Dia. of coil

mm

mm

kgs

mm

Coil 200

0.20-0.30

7

200

Coil 300

0.30-0.60

20

300

Coil 350

0.60-0.80

30

350

Coil 450

0.80-1.60

50

450

Coil 600

1.60-4.50

100

600

Coil 900

4.50-8.00

200-900

900

Items

Wire Dia.

Coil with spider

Coil without spider

outer Dia.

Inner Dia.

outer Dia.

Inner Dia.

Unit weight

mm

mm

mm

mm

mm

kgs

Orbit 200

0.80-1.30

600

400

800

515

200

Orbit 300

1.31-3.00

600

400

800

515

500

Orbit 500

2.00-4.50

600

400

800

515

1000

Specification

Wire Dia.

Unit weight

Outer Dia. of coil

Inner Dia. of coil

Highth of coil

mm

kgs

mm

mm

mm

Z2

0.60-4.50

200-400

500-600

350

250

Items

Wire Dia.

Specification

Flange Dia. of Wheel

Highth of Wheel

Unit weight

mm

mm

mm

kgs

ABS Bobbin

0.15-0.60

DP25

280

220

25

0.20-0.60

DIN355

355

200

45

Metal Bobbin

0.60-1.20

G240

760

320

250

Plywooden Bobbin

1.30-4.50

760

760

360

350