Plastic Mould Steel (เหล็กทำแม่พิมพ์พลาสติก)

 

  02-295-1000
 Email : This email address is being protected from spambots. You need JavaScript enabled to view it.


 M238

Bohler M238: Equivalent* 1.2738, P20+Ni, PX4, HPM7

 

 Chemical composition (average %)

  C Si Mn Cr Mo Ni
M238  0.38 0.30  1.50  2.00  0.20 1.10

 

Material characteristic and use

Properties The hardened and tempered plastic mould steel. Because of the Ni-addition there
is no hardness decrease in the center of large sizes over 400 mm thickness.
(see Quantitative phase diagramm). A special melting technology offers good
machinability.
   
Application Large moulds (over 400 mm thickness) for plastics processing, mould carrier frames
for the plastic moulds, components for general mechanical engineering and tool 
manufacture.
   
As-supplied condition Hardened and tempered to approx. 1000 N/mm3 (approx. 28- 32 HRC).
General, no heat treatment required. If heat treatment is carried out for special
purposes, e.g. for obtaining an increase in strength, the following instructions should
be observed.

 

Physical characteristics

    Temperature
    20 ºC 100 ºC 200 ºC 300 ºC 400 ºC 500 ºC 600 ºC 700 ºC
Density (kg/dm3)  7.85              
Thermal conductivity W/(m·K)  33.0  33.5  33.5  33.5  33.5      
Specific heat J/(kg·K)  460              
Electrical resistivity Ohm·mm2/m  0.19              
Modulus of elasticity N/mm2  210x103              
Thermal expansion 10-6m/(m·K)    12.8  13.0  13.8  14.0  14.2  14.2  14.5

* Chemical composition is only reference and might not be the same

เหล็กแข็งเกรดแนะนำ

Our Company

โทรศัพท์ : 66(0) 2295-1000-8,66(0) 2295-1901-6
แฟกซ์ : 66(0) 2295 1009 , 66(0) 2683 0943 , 66(0) 2683 0944
ที่อยู่ : 42, 48 ถนน พระราม 3, ซอย 53, ยานนาวา, กรุงเทพ 10120
โทรศัพท์ : 66(0) 38-080-400 , 66(0) 38-080-411
แฟกซ์ : 66(0) 38-080-409 , 66(0) 38-080-419 , 66(0) 38-080-429
ที่อยู่ : 155 หมู่ 14 ถนน สุขุมวิท, บางปะกง, ฉะเชิงเทรา 24130

Visit Us