Type

Model(GB)

Chemical composition(%)

C

Mn

Si

S

P

other

THQ-50A

ER49-1

0.11

1.80/2.10

0.65/1.95

0.03

0.030

Cu0.05Ni030Cr0.20

THQ-50C

ER50-6

0.06/0.15

1.40/1.85

0.80/1.15

0.035

0.025

Cu0.50 other 0.50

Type

ModelGB

Mechanical propertise

Rel / Rp0.2  (MPa)

Rm (MPa)

A(%)

A KV(J)

THQ-50A

ER49-1

372

490

20

Normal temperature47

THQ-50C

ER50-6

420

500

22

-30 °C27