ASTM A536 120-90-02, EN-GJS-900-2, 800-2, GGG80 Ductile Iron, Nodular Iron, SG Iron
ASTM A536 120-90-02 (EN-GJS-900-2, GGG80) is a type of ductile cast iron (SG iron, nodular iron) with the highest tensile strength. This cast iron grade is suitable to produce mechanical parts with very high duty.
Chemical Composition, Mechanical and Physical Properties
Our Dandong Foundry could produce this material grade, so herein, we share its chemical composition, mechanical and physical properties for your reference.
1. Equivalent Material Grades of Ductile Iron ASTM A536 120-90-02
The equivalent grades of ASTM A536 120-90-02 are EN-GJS-900-2, ISO 900-2, QT900-2, although some required elongation 3%, and some required 2%, but their other properties are the same, so they could be taken as the equivalent grades.
In the most countries' standards, there are no equivalent grades as this grade, so the highest ductile iron grades will be GGG80, FCD800, GS800-2, FGS800-2, FGE80-2, FNG80-2, SJK-800, if you use these standards, then these grades could be taken as the equivalent material grades.
2. Chemical Composition of Ductile Iron ASTM A536 120-90-02
C: 3.65-3.90, Si: 1.70-1.90, Mn: 0.30-0.50, P: < 0.06, S: < 0.03, Mg: 0.035-0.050. However, this range can not be taken as the standard of inspection, unless there is special requirement. All foundries could adjust their chemical composition as long as they could meet the mechanical requirements of standards.
3. Mechanical and Physical Properties of Ductile Iron ASTM A536 120-90-02
Tensile Strength ≥ 827 MPa. Yield Strength ≥ 621 MPa. Elongation ≥ 2%.
There is no strict stipulation to the hardness of ASTM A536 120-90-02, however, normal hardness range should be 280 to 360 HB. (Brinell Hardness) without heat treatment, if you do not have strict requirement for the hardness, the normal hardness range could be 245 to 360 HB.
4. Main Application of Ductile Iron ASTM A536 120-90-02
Because of the very high tensile strength and hardness, this grade of ductile cast iron could be used to produce reduction gear, cam shaft, tillage plough etc.