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Lighting hardware
Product description
Parameters
Technical parameters:
Spheroidal Graphite Iron Castings (GB/T 1348-2009)
Compliance with relevant standards:
Technical parameters:
Designation
|
Tensile strength σ bN/ mm2 (kgf/nmm2) |
Yield strength σ0.2N/ mm2 (kgf/nmm2) |
Elongation at break σ(%
|
For reference
|
|
Min. value
|
Brinell hardness HB
|
Main metallographic structure
|
|||
QT400-18
|
400(40. 80)
|
250(25. 50)
|
18
|
130-180
|
Ferrite
|
QT400-15
|
400(40. 80)
|
250(25. 50)
|
15
|
130-180
|
Ferrite
|
QT400-10
|
450(45. 90)
|
310(31. 60)
|
10
|
160-210
|
Ferrite
|
QT500-7
|
500(51. 00)
|
310(32. 65)
|
7
|
170-250
|
Ferrite + Spherical light
|
QT600-3
|
600(61. 20)
|
370(37. 75)
|
3
|
190-270
|
Ferrite + Spherical light
|
QT700-2
|
700(71. 40)
|
420(42. 85)
|
2
|
225-305
|
Spherical light
|
QT800-2
|
800(81. 60)
|
480(49. 98)
|
2
|
124-335
|
Spherical light or tempered structure
|
QT900-2
|
900(91. 80)
|
600(61. 20)
|
2
|
280-360
|
Bainite or tempered martensite
|
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