AISI H13 Mandrel Bar for Seamless Steel Pipe

Description

AISI H13 Mandrel Bar For Seamless Steel Pipe

AISI H13 Mandrel bar is very long round rod and plays a crucial role in producing large diameter seamless pipes in modern industries, especially one of the key pieces of tooling required during the production of Seamless Tubes and Pipes. Once the billet has been pierced, the Mandrel Bar supports the tube shell internally during elongation and wall thickness reduction.

During producing, Mandrel Bars have to bear strong and complicate stretch, compressing touching stress and high temperature cold-hot yield stress under high speed cycling. Under these circumstance, chemical components, mechanical propertied, no-metallic inclusion, grain size, microstructure, ultrasonic test, size precision, surface finish, all these factories of steel are required very strictly.

Our Mandrel bar is made from H13(4Cr5MoSiV1) and we are able to deliver mandrel bars of up to 25 m in length and up to 800 mm in diameter to nearly all manufacturers of seamless tubes. The quality and service life of CHINA TIPTOP seamless pipe mandrel bar has won good reputation from home and abroad.



AISI H13 Chemical Composition

C

Si

Mn

S

P

Cr

Mo

Ni

V

H

O

0.32

0.8

0.2

<

<

4.75

1.1

<

0.8

<

<

0.45

1.2

0.5

0.008

0.012

5.5

1.75

0.25

1.2

2PPm

20PPm

AISI H13(4Cr5MoSiV1)is mostly used material,any other grades can be nominated by customer,such as AISI H11

AISI H13 Mechanical Properties

Spec

Tensile Strength
(Mpa)

Yield Strength
(Mpa)

Elongation
(%)

Reduction of Area
(%)

Impact Value
(J)

Hardness after chrome plating
(HRC)

<200mm

1127-1274

>931

>8

>25

>20

60-62

>200mm

1078-1274

>882

>8

>25

>20

60-62

Manufacture processing:

Smelting Process: EBT + LF-VD + IC + ESR

Process: Forging → NDT → Rough Machining → NDT → Heat Treatment → NDT → Finish Machining → Chrome Plating → Phosphating → Packing + Delivery



Ordering notices:

-OD up to 800mm

-Length up to 25,000mm

-Threading according to API standard.

-Chrome plating available upon request. (Plating thickness 0.055-0.070mm)

-Solid and hollow bars both available.