Astm a48 a48m standard specification for gray iron castings, grades including class no. Metric equivalents in mm maximum suction pressure is. Casting material gray iron in astm a48 sand casting, investment. In the united states, the most commonly used classification for gray iron is astm international standard a48. Milstd129 marking for shipment and storage available from standardization documents order. Can be oil quench hardened from 860c to attain a rockwell c 50 minimum surface hardness. In order to standardize solidification and cooling rate, standard test specimen sizes are used to ensure conformance to the specification. Astm a48 class 30 related standards din gg20, bs 1452 grade 220 is a gray cast iron. Part material astm 1 body cast iron astm a126 class b 2 pfa fused ball cast iron astm a48 class 35 3 stem stainless steel astm sa 479 10a 4 gland plate steel astm a53m 5 handle steel astm a53m 6 handle bracket stainless steel astm a536 7 packing follower stainless steel astm sa 479 10a 8 stem indicator steel astm a53m 9 handle bracket spacer.
Astm a48 94ae1 standard specification for gray iron castings. Pressuretemperature controls group, 221 armstrong blvd. This data sheet focuses on gray iron astm a48 class 30. In the specs for a project it states that the frame and cover for gratings shall be cast gray iron, astm a48a 48m, class 35b. The graph bars on the material properties cards below compare grade 30 cast iron to. Astm class 50 standard gray iron test bars, as cast. Astm a48a48m032016 standard specification for gray. Cast iron is popular due to the good strength it provides relative to cost.
Metric equivalents in mm maximum suction pressure is 240 psig. Astm class 60 standard gray iron test bars, as cast. Astm class 40 standard gray iron test bars, as cast. Discharge flange shall be machined and drilled to ansi standards for 125 lb. For temperature above 230c and up to 350c, only class 275, 300, 325, 350, 380, and 415 casting are suitable. Our gray iron castings have the right grade of gray iron you need. It is the most common cast iron and the most widely used cast material based on weight. Bunan rubber bellows, ceramic stationary, carbon rotating face packing gland. Astm a48 a48m standard specification for gray iron castings, grades. Each class represents the tensile strength in ksi of a separately cast test bar poured from the iron that makes the casting. For example, a casting certified to astm a48 class 40 is cast with iron that has 40,000 psi tensile strength in a separately cast test bar. A full bar means this is the highest value in the relevant set. The surface of the casting shall be free of adhering sand, scale, cracks, and hot tears.
C cast iron astm a48 class 30 d 316ss a744 cf8m s e bronze 93a c87500 f cast iron astm a48 class 30 g 316ss a744 cf8m l h bronze 93a c87500 i cast iron astm a48 class 30 construction details dimensions in inches. Astm a48 standard specification for gray iron castings this specification covers gray iron castings intended for general engineering use where tensile strength is a major consideration. Your source for raw and machined grey iron castings. Class 25, 30,35,40 tensile and heat resistant irons. Grades 25, 30, 35 and 40 can fill specific requirements for hardness and wear, and heat treatments can yield even higher mechanical properties. The low cost of production and attractive properties. Casting surfaces shall be reasonably smooth and shall be free of scale and burned on. Class 35b exhibits the best corrosion and wear resistance properties as well as the desirable quality of high compressive strength. Ductile iron castings shall conform to astm a536 or better. The number indicates the minimum tensile strength of the separately cast test bar, and the letter indicates the size of the test bar. Cast iron possesses the highest strength, hardness, resistance to wear and heat treat response for an unalloyed gray iron. Astm a48 gray iron pdf document free summaries, past. E8 test methods for tension testing of metallic materials. The water passages on bowl sizes 6through 18 shall be lined with porcelain enamel or fusion epoxy lined to reduce friction loss, shall be free of blow holes, sand holes and other detrimental defects, and shall be accurately machined and fitted.
Highquality leadfree chromatefree primer and paint coatings. Cast iron astm a48 discharge head class 30 bowl shaft 26 astm a276 stage aisi t304 ss shaft 7 4 motor required for 5 hp pumps. Square frames and covers light duty, reversible type frame. Carbon listed in the composition table is the total carbon.
Gray iron astm a48 class 30 data sheet penticton foundry. Astm a48a48m032016 standard specification for gray iron. Astm a48, sae j431, gm 274m and astm a126 are standards for gray cast iron. Castings are classified on the basis of the tensile strength of the iron in separately cast test bars. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. Typical specifications and mechanical properties ferrous. Durabar g2 continuously cast gray iron bar stock astm a48. When fractured, it is grayish in colour hence the name specifically, a fracture will follow along the graphite flakes which are gray. The high carbon content yields a flake graphite structure. Comparison table for some gray iron casting grades. This is a comparison table for some gray iron casting grades in these standards.
Wcb 300 steam, air, noncorrosive gases 250 250 steam, air, non. Gray ironconforming to astm a48, class 35b, as noted in section 7. The bowls shall have vitreous enamel lined waterways to reduce friction. Astm grade 30 or 200 iso 200, enjl 1030, f12101 grey.
Repair of defects by welding or by the use of smoothon or similar material will not be permitted. Gray iron has a dense gray structure and offers excellent machinability. Gray iron castings, astm specification a 48, class 30b. Stocking tubing sizes up to 22 inch od with up to 4. It is used for housings where the stiffness of the component is more important than its tensile strength, such as. A48 a48m 03 standard specification for gray iron castings, gray iron castings. A wide variety of astm a48 options are available to you, such as electronic.
You can also choose from aisi, astm, and jis astm a48, as well as from plush astm a48 there are 112 suppliers who sells astm a48 on, mainly located in asia. Monel stage astm b164 coupling astm a582 aisi t303 ss spline protector neoprene suction screen astm a582 aisi t303 ss shaft sleeve aisi t316 ss powder metal bearing viton impeller astm b584 c87610 cotter pin. Edit your published post entitled this is the title of your first post, add your own text, images or videos, and click publish. Casting are classified on the basis of the tensile strength of the iron in separately cast test bars. To create your first blog post, click here to open the blog manager. Using astm a 48 a 48m 03 standard specifications for gray iron casting, the minimum tensile strength for the class 35b is 35 ksi and for the class 30 is. Astm a48 a48m 03 standard specification for gray iron. Com 7 model 4000 cast iron flanged end ball valve part material astm 1 body cast iron astm a126 class b 2 pfa fused ball cast iron astm a48 class35 3 stem stainless steel astm sa 479 10a 4 gland plate steel astm a53m 5 handle steel astm a53m 6 handle bracket stainless steel astm a536 7 packing follower stainless steel astm sa 479. Grade 30 is the astm designation for this material. For temperature above 450f and up to 650f, only class 40, 45, 50, 55, and 60 casting are suitable.
Popular applications for gray iron include diesel and gasoline engine blocks and cylinder liners. Astm a48 astm a48 is the most popular gray iron casting specification and classifies castings to various grades by their tensile strength. Class i 0 25 free of sand holes and other defects, accurately machined and with a surface discharge. Aisi 416ss lantern ring teflon mechanical shaft seal 188 s.
Astm a48 standard specification for gray iron castings. A48 94ae1 standard specification for gray iron castings, iron castingsgray, gray iron castings for general engineering use. Castings are classified on the basis of the tensile strength of the iron in separately. Sep 12, 2018 astm a48 class 30 related standards din gg20, bs 1452 grade 220 is a gray cast iron. Cast iron astm a48 cast iron gray iron is an alloy of iron and carbon.
At texcellent industries, we have many sizes of cast iron in stock. They have some grades which have some equal or similar mechanical properties, such as tensile strength and hardness. Astma48 standard specification for gray iron castings. Cast iron material comparison chart buford, ga cab.
Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. Typical specifications and mechanical properties ferrous metals. Frame and cover for gratings structural engineering. Cast iron astm a48 class 30 bronze optional astm b854 uns c87500 seal retainer cast iron astm a48 class 30 adaptor bracket cast iron astm a48 class 30 shaft sleeve 416 s. Castings shall conform to the requirements of astm a48, class 30 and shall be free of porosity, shrink cavities, cold shuts, or cracks or any surface defects which would impair serviceability. Gray iron consists of graphite flakes in a metallic matrix.
Durabar g2 gray iron will contain this type of graphite distribution and will be best suited for applications requiring moderate strength, good vibration damping and thermal conductivity, along with optimal machining characteristics. Astm a48 standard for gray iron castings dandong foundry. This orders gray iron into classes which corresponds with its minimum tensile strength in thousands of pounds per square inch ksi. Data provided by the manufacturer, siltin industries, inc.
The values stated in each system may not be exact equivalents. Astm a278 standard for gray iron casting for pressure parts. Property class 25 class 30 class 30 class 35 class 40. Standard practice for steel castings, welding, quali. Ferroalloys to find similar documents by classification. It is widely used for bearing and bushing applications in the hydraulics industry. Castings of all classes are suitable for use up to 450f 230c. Many requirements are common to several specifications and are given in astm a 781a 781m, astm a 703a 703m, astm a 957, astm a 985, and iso 4990. Therefore it makes a good load bearing street hardware.
Casting of all classes are suitable for use up to 230c. Iron conforming to astm a48, class 35b, as noted in section 7. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. This specification covers gray iron castings intended for general engineering use where tensile strength is a major consideration. Durabar g2 is built around astm a48 class 40 gray iron. The top of the discharge head shall have a rabbet fit to accurately locate the vertical hollow shaft. Property class 25 class 30 class 30 class 35 class 40 ascast ascast annealed ascast ascast.
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