Grade

Fe(%)

O(%)

C(%)

N(%)

D10(um)

D50(um)

D90(um)

Hardness

Bending strength

EHA-T

≥99.0

≤0.50

≤0.03

≤0.01

1.5-3.5

4.0-8.0

8.0-10.0

Max: 90 HRB

Max: 1300 MPa

UHA

≥98.8

≤0.60

≤0.03

≤0.01

2.3-3.1

4.8-5.5

8.0-10.0

Max: 89 HRB

Max: 932 MPa

UHB

≥98.5

≤0.85

≤0.03

≤0.01

1.5-2.5

3.3-4.3

5.5-7.0

Max: 91.5 HRB

Max: 885.6 MPa

UHD

≥98.85

≤0.70

≤0.03

≤0.01

3.5-5.0

7.0-9.0

13.0-25.0

Max: 85 HRB

Max: 745.1 MPa

UHF

≥98.2

≤1.15

≤0.03

≤0.01

1.0-1.5

2.5-3.5

4.2-5.2

Max: 99.5 HRB

Max: 1006.2 MPa

Grade

Fe(%)

O(%)

C(%)

P(%)

D10(um)

D50(um)

D90(um)

Hardness

Bending strength

UHF-P

≥96.65

≤1.04

≤0.01

≤2.30

1.0-1.5

2.2-3.2

4.0-5.0

Max:112.5HRB

Max:1571MPa

Grade

Fe(%)

C(%)

N(%)

O(%)

D10(um)

D50(um)

D90(um)

UIF

≥98.55

≤0.03

≤0.01

≤0.80

1.10

2.55

4.21

UI-100

≥98.0

≤0.015

≤0.01

≤0.80

7.0

43.0

96.0

Grade

Fe(%)

O(%)

D10(um)

D50(um)

D90(um)

Hardness

Bending strength

ZB

≥98.3

≤1.10

1.2-2.8

3.0-4.8

5.3-7.6

Max: 90.5 HRB

Max: 1105 MPa

ZF

≥98.2

≤1.15

1.0-1.5

2.5-3.5

4.2-5.2

Max: 97 HRB

Max: 1176 MPa

Grade

Fe(%)

O(%)

D10(um)

D50(um)

D90(um)

Hardness

Bending strength

SE-02

≥98.5

≤0.66

7.6-8.4

47.0-48.4

103.2-104.8

Max: 109.5 HRB

Max: 1192 MPa

SE-04

10.0-30.0

45.0-75.0

100.0-140.0

65.9-66.8

125.8-126.0

Max: 103.2 HRB

Max: 1233.3 MPa

Grade

Fe(%)

C(%)

N(%)

O(%)

D10(um)

D50(um)

D90(um)

SR-B

94.0

≤2.0

≤0.01

≤3.0

1.0-1.5

2.5-3.5

4.2-5.2