Chaw

%

C

Thiab

Mn

P

S

Cr

Hauv

Rau

Nrog

Al

Ntawm

Fe

Co

B

Zr

hwv 4738

MIN

0.03 ib

-

-

-

-

18.0 Nws

tshuav nyiaj li cas

3.5

-

1.20

2.75 ib

-

12.0 Nws

0.003 ib

0.02 ib

MAX

0.10

0.15

0.10

0.015 ib

0.015 ib

21.0 Nws

tshuav nyiaj li cas

5.0

0.10

1.60 ib

3.25

2.00 Nws

15.0 Nws

0.01 ib

0.08 ib

ceev

Melting kub ntau yam

p = 8.22g/cm

1330-1360 ℃

Standard No. & Ntau yam

qauv xeev

Phaj thickness 8 / mm

Tensile zog

730 ° C Durability

Chav kub hardness

θ / ℃

Tensile zog
Rm N/mm2

yield zog
Rp0.2 N/mm2

A5%

σ/MPa

Sijhawm/h

A%

QJ/DT01.63026
Txias Rolled Sawb

Lub xeev muab khoom
+995 ° C ntiaj teb 15 ° C ×
2.0h ± 0.25h / AC
los yog txias txias
+ stabilization + kev laus

≤0.50

20

≥1170

≥760

≥15

-

L

(34 txog 44) HRC lossis sib npaug

540

≥1000

≥690

≥13

-

> 0.50

20

≥1205

≥795

≥ 20

-

-

(34 txog 44) HRC lossis sib npaug

540

≥1035

≥725

≥15

-

> 0.40 ~ 0.50

430

≥ 23

≥4

> 0.50

430

≥ 23

≥4