GB 1348 QT800-2 is pearlitic nodular cast iron with very high tensile strength, but very low ductility.
For pearlite nodular cast iron, pearlite content in the matrix structure accounted is more than 80% of ductile iron (nodular iron). The ductile iron conforms to Chinese national standards QT600-2, QT700-2 and QT800-2 belong to pearlite nodular cast iron.
This type of ductile iron is usually obtained by normalizing treatment, or it can be obtained by adding alloying elements and cooperating with technological measures. The QT600-2, QT700-2 and QT800-2 nodular cast iron is mainly used to manufacture parts that require high strength, wear resistance and low toughness (low plasticity).
Mechanical properties of GB 1348 QT800-2 ductile cast iron:
Mechanical Properties |
GB 1348 QT800-2 |
Tensile Strength σb (MPa) |
≥800 |
Yield Strength σ0.2 (MPa) |
≥480 |
Elongation δ(%) |
≥2 |
Hardness HBS |
245~335 |
Equivalent Grades of GB 1348 QT800-2 ductile cast iron:
Country |
Standard |
Material Grade |
ISO |
ISO 1083 |
GRADE 800-2 |
China |
GB 1348 |
QT800-2 |
USA |
ASTM A536 |
120-90-02 |
Germany/Austria |
DIN 1693 |
GGG80 |
European |
EN 1563 |
EN-GJS-800-2 |
Japan |
JIS G5502 |
FCD800 |
Italy |
UNI 4544 |
GS800-2 |
France |
NF A32-201 |
FGS800-2 |
UK |
BS 2789 |
800/2 |
Spain |
UNF |
FGE80-2 |
Belgium |
NBN 830-02 |
FNG80-2 |
Australia |
AS 1831 |
GRADE 800-2 |
Sweden |
SS 14 07 |
0864-03 |
Norway |
NS11 301 |
SJK-800 |
|
