Machining surface finish Surface finish is another term for surface roughness. The surface finish is put forward according to the human visual point of view. Meanwhile, the surface roughness is put forward according to the actual surface micro-geometry. Because of its conformity with international standards (ISO), China adopted surface roughness after the 1980s and abolished […]
The comprehensive mechanical properties of gray cast iron are low, due to the presence of flake graphite. The metal matrix structure is split and the effective area of load-bearing is reduced. However, the gray iron castings’ vibration damping, wear resistance, castability and machinability are better. If the gray iron casting is too hard to machine […]
Inspection Rules of Gray Cast Iron Inspection rights The supplier quality department has the right to inspect and accept or not the castings. The buyer may request re-inspection of castings when necessary. The supplier is responsible for the authenticity of the inspection results; and submits the production record documents when required by the buyer. […]
Ductile cast iron 80-60-03 is a high grade material in US standard ASTM A536. This grade has comparatively high tensile strength, but low elongation. Now, let me introduce its mechanical properties, chemical composition, foundries and castings to you. Properties of Ductile cast iron 80-60-03 Tensile Strength ≥ 555 MPa (80,000 psi). Yield Strength ≥ 415 […]
Ductile Cast Iron EN-GJS-400-15/GGG40 EN-GJS-400-15 ductile iron is a very common material in European standard DIN EN 1563. It is equal to GGG40 in DIN 1693, QT400-15 in China, A536 60-40-18 in USA ASTM, GS400-12 in Italy, FCD400 in Japan, FGS400-12 in France, FNG42-12 in Belgium, SJK-400 in Norway and ISO 1083 400-15. Now, […]
60-40-18 ductile iron is equal to 400-12, but with higher elongation. 60-40-18 is US standard ASTM A536, while 400-12 is Australia standard AS 1831. In the meantime, the equal grade in China is QT400-18 or QT400-15. Properties of 60-40-18 ductile iron/400-12 cast iron 60-40-18 ductile iron is the lowest grade of ductile iron. Its minimum […]
How to Prevent Ductile Iron Castings from Bursting in Winter The quality of ductile iron castings is generally evaluated by the spheroidization rate. The more rounded, finer, and evenly distributed graphite, the smaller the splitting effect on the metal matrix. And the smaller the stress concentration caused, the better the performance of ductile iron. Process […]
EN-GJS-500-7 Ductile Cast Iron GGG50 EN-GJS-500-7 is the middle grade of ductile cast iron in European standard DIN EN 1563. It is equal to GGG50 in DIN 1693, QT500-7 in China, A536 70-50-05 in USA ASTM, GS500-7 in Italy, FCD500 in Japan, FGS500-7 in France, G500/7 in India, FGE50-7 in Belgium, SJK-500 in Norway, and […]
Appearance Inspection Method of Ductile Cast Iron Ductile cast iron is a high-strength cast iron material whose comprehensive properties are close to steel. Based on its excellent properties, it has been successfully used to cast some parts with complex forces and high requirements for strength, toughness and wear resistance. Ductile cast iron has rapidly developed […]
Definition of hand mold: Hand mold is a modeling process that is all done by hand or hand tools. Hand mold operation is flexible, wide adaptability, simple process equipment, low cost. However, its casting quality is poor, productivity is low, labor intensity is high, and the technical requirement is high. Therefore, hand mold is mainly […]