What is ASTM a48?

What is ASTM a48?

This specification covers gray iron castings intended for general engineering use where tensile strength is a major consideration. The surface of the casting shall be free of adhering sand, scale, cracks, and hot tears, as determined by visual examination. …

Is STD for cast iron?

This standard was first pubIished in 1950 and subsequently revised in 1962, 1970, 1978 and 1993. The Pig Iron and Cast Iron Sectional Committee decided to revise IS 210 by merging it with IS 6331 : 1987. For the benefit ofthe purchaser, typical properties of grey cast iron have been added in Annex C.

What are the grades of cast iron?

The 4 Types of Cast Iron

  • #1) Gray Cast Iron. The most common type, gray cast iron features a graphite microstructure consisting of many small fractures.
  • #2) White Cast Iron. While not as common as gray cast iron, white cast iron is another type worth mentioning.
  • #3) Ductile Cast Iron.
  • #4) Malleable Cast Iron.

What is the ultimate tensile strength of cast iron 4.5% C ASTM A 48 in PSI?

40000 psi

Physical Properties Metric English
Hardness, Rockwell B 97 97
Hardness, Rockwell C 20 20
Hardness, Vickers 246 246
Tensile Strength, Ultimate >= 276 MPa >= 40000 psi

What is FG cast iron?

Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. It is the most common cast iron and the most widely used cast material based on weight.

Which material has highest tensile strength?

In terms of tensile strength, tungsten is the strongest out of any natural metal (142,000 psi). But in terms of impact strength, tungsten is weak — it’s a brittle metal that’s known to shatter on impact. Titanium, on the other hand, has a tensile strength of 63,000 psi.

What is the difference between A36 and 1018 steel?

ASTM A36 steel is the most commonly available of the hot-rolled steels. The hot roll process means that the surface on this steel will be somewhat rough. Note that its yield strength is also significantly less than 1018 – this means that it will bend much more quickly than will 1018.

Which is ASTM A48 standard for gray iron castings?

For example, ASTM A48 Class 20 will be detailed enough for iron foundries, it means the min. tensile strength of gray iron castings must be higher than 20 ksi (138 Mpa). If you want to know the equal grades for other standards, please refer to Equivalent Grades of Gray Iron and Ductile Iron. 2. Dimensional Requirement

What is the UNS number for ASTM A48 Class 25?

ASTM A48 class 25 is a material grade of gray cast iron in USA, which is higher than class 20, but lower than class 30. Its UNS number is F11701. There are four specific grades as ASTM A48 class 25A, 25B, 25C and 25S. Mechanical Properties of A48 Class 25 Cast Iron:

What is the hardness of A48 Class 25 cast iron?

There are four specific grades as ASTM A48 class 25A, 25B, 25C and 25S. Mechanical Properties of A48 Class 25 Cast Iron: Its minimum tensile strength is 172 Mpa. The gray cast iron is brittle, so there is no requirements to yield strength and elongation. Its hardness range is BH 170-229.

What is the hardness of gray iron class 30?

Gray iron class 30 is one grade in a family of many. Chemistry ranges are not specified in the ASTM A48 standard. Instead, chemistry and hardness values listed in this data sheet would be typical for a class 30. 30 (53) at 212°F (100°C).