Home » Products »  Soft Magnetic Iron Steel Sheets & Coils » Soft magnetic iron steel (SUY-1)

Soft magnetic iron steel (SUY-1)

coil-en
Main applications

Deep drawing, coining, electromagnetic applications,
motor yokes, and magnetic shielding


Product size range

Thickness : 0.030~2.5mm  

Width        : 3.0~300mm 

 
Manufacturing sites

JAPAN, SHANGHAI


  • Product overview Features
  • Standards & Chemical composition
  • Tokkin Advantages
  • Physical Properties Mechanical properties
  • Other

Product overview

SUY-1 is a soft steel with ultra-low carbon and low impurities.

The grade is defined in the standard, "JIS C 2504 Soft Magnetic Iron," and is generally referred to as "pure iron."

There are four SUY grades from SUY-0 to SUY-3. The suffix indicates the material's magnetic properties with grade 0 providing the best magnetic properties.
Tokkin can manufacture SUY-1.

 

What is the difference between SUYP and SUYB?
SUY is the general name for this steel grade.
The suffixes P (plate) and B (bar) can be used to identify the shape of the product.

 

Features

SUY-1 has less carbon content and lower impurities than carbon steel. It also features good drawability and good properties as a soft magnetic material. SUY-1 is mainly used in motor applications, but is recently being used more and more as magnetic shielding.
It has high flux density and coercive force, and these magnetic properties can be maximized if the material is re-subjected to magnetic annealing after the cold-rolling process.

Chemical composition

TOKKIN

Designation

Chemical composition(%)

C

Si

Mn

P

S

SUY

(JIS C 2504)

≦0.030

≦0.200

≦0.50

≦0.030

≦0.030

Elements(eg.)

0.004

0.010

0.170

0.010

0.005

Tokkin Advantages

 Ultrathin foils

We can manufacture ultra thin sheets of 0.030 to 0.099 mm.

 

 Flexible, small-lot production

We can manufacture standard lots weighing 300 kg,

and are also happy to consider smaller lots upon consultation.

(Requests for small-lot orders will be dealt with on a case-by-case basis.)

 

 High quality and reliability

Our ability to produce thickness tolerances that are impossible to achieve using regular materials allows us to manufacture products that provide stable strength and part dimensions.
Moreover, we can reduce variation between lots and ensure a high degree of reliability through careful management of manufacturing processes.

 

 Ability to adjust materials to desired hardness

We make products to order, and can adjust hardness as required.

 

 Select your surface finish

By changing the roll used in the rolling process, we can offer a bright or dull finish.

If required we can also provide a hairline finish (outsourced).

Physical Properties

Grade

Density

g/cm3

Specific heat

J (㎏·K)

Coefficient of thermal expansion

(0°C–100°C) 10-6/K

Thermal conductivity

W/(m·K)

Electrical resistance

μΩ·㎝

Young's modulus

N/mm2

SUY-1

7.87

481

11.7

73.3

13

206,000

 

Mechanical properties

(1) This table below shows typical mechanical properties for products with a skin-passed finish (rolling reduction of 2%–3%).

Finish

Hardness

HV

Tensile Strength

N/mm2

Yield point

N/mm2

Elongation

%

Skin passed

95–110

275–315

175–225

40–46

 

(2) The graph below shows changes in hardness when an annealed material is cold rolled.

Magnetic characteristics

(1) This graph shows tempering temperature and coersive force. It has the same characteristics as JIS SUYP-1. 

  

Fig.2 Tenpering temperature-Coercive force curve

 

 

(2) What is applied magnetic annealing at 850℃×3hr satisfies the standard of JIS SUYP-1. 

 

Magnetic characteristics

Magnetic flux density     T

Coercive force*1

Magnetic strength

Thickness

79.6 A/m

159.2 A/m

238.8 A/m

398 A/m

1990 A/m

Hc A/m

B1

B2

B3

B5

B25

Hc

0.10

0.57

1.02

1.20

1.36

1.59

33.4

0.15

0.68

1.07

1.23

1.39

1.59

26.3

0.30

0.69

1.10

1.28

1.44

1.63

30.2

0.50

0.74

1.21

1.36

1.7

1.64

32.6

1.00

0.78

1.22

1.35

1.47

1.64

30.2

JIS SUY-1

0.50≦

1.00≦

1.20≦

1.35≦

1.55≦

≦79.1

*1 Coercive force is the value for magnetic flux density 1.5T.