What is ASTM B61?
ASTM B61, 2015 Edition, May 1, 2015 – Standard Specification for Steam or Valve Bronze Castings. This specification2 establishes requirements for a highgrade steam-metal or valve-bronze alloy (Copper Alloy UNS No. C922003) used for component castings of valves, flanges, and fittings.
What is ASTM B584?
The ASTM B584 does not specify any specific alloy, rather it specifies a group of copper alloys along with a specific method of casting these products. The ASTM B584 specification is for a number of different copper alloys manufactured by the sand or static casting process.
What is ASTM B148?
ASTM B148, 2018 Edition, October 1, 2018 – Standard Specification for Aluminum-Bronze Sand Castings. This specification establishes requirements for sand castings produced from copper-base alloys having the alloy numbers,2 commercial designations, and nominal compositions shown in Table 1.
What is B148 C95800?
Aluminium-Bronze / B148 C95800 valves and their use. The most common valve in aluminium-bronze is the large diameter butterfly valve which often comes with a monel trim. Its major drawback is its low tolerance to heat. Aluminium-bronze is also referred to as nickel-aluminium bronze and abbreviated as NAB.
What is ASTM A536?
ASTM A536 refers to the standard specification for ductile iron castings. Ductile iron is also called spheroidal graphite iron or nodular iron. In contrast to gray iron, where the graphite occurs as a network of flakes, the graphite in ductile iron occurs as spheroids.
What is ASTM B150?
ASTM B150: C63000 / AMS4640 is one of the most commonly used American grades of nickel aluminium bronze. Containing around 10% aluminium, 5% nickel and 3% iron the alloy offers an inherent high strength and hardness combined with a very good toughness and an excellent resistance to wear, shock and abrasion.
Which is better cast iron or ductile iron?
Ductile iron is less brittle than other cast iron, even before heat treatment. It does not fracture as easily with impact. Being ductile allows the iron to bend. In comparison, gray cast iron is harder.
Is ductile iron stronger than steel?
While there is no large difference when it comes to tensile strength, ductile iron has the greater yield strength (40 ksi). Cast steel, on the other hand, can only reach 36 ksi yield strength. As the strength of ductile iron increases ductility decreases.
Can ductile iron be welded?
Ductile iron: Weldable but rare, as it’s an extensive and slow process. Malleable iron: Not welded, as welding changes the properties of the metal, rendering it useless.
Is ductile iron better than steel?
The difference in properties shouldn’t therefore influence the choice of one material over the other. Steel has better shock resistance than ductile iron. However, ductile iron has better vibration damping properties rendering ductile iron mechanical components noticeably quieter.