+86-21-58386256
Class II Type A 12% Cr martensitic white cast iron, ASTM A532-75a, Standard martensitic white cast iron from ASTM A532-75a. 25 mm ball diameter typical maximum section thickness.
Jan 17, 2015· Besi cor putih (white cast iron) Besi cor putih mempunyai fasa sementid+perlit sehingga mempunyai sifat keras dan getas. b. Besi cor kelabu (grey cast iron) Unsur penyusun dari besi cor kelabu yakni : Fe + C + Silikon (Si).dengan sifat : agak getas yang dikarenakan ujung-ujung grafit berbentuk serpih tajam, akibatnya konsentrasi tegangan tinggi ...
Jul 13, 2021· The Modulus of Elasticity for White Cast Iron constant displays the value of the modulus of elasticity for martensitic white cast iron ASTM A532 Class 1 Type A (175 GPa).. Modulus of Elasticity is the measure of a material's tendency to deform elastically when a force is applied. The Modulus of Elasticity is also known as Young's Modulus, the tensile modulus, or elastic modulus.
A cast iron alloy composition comprising 2.5-3.5% carbon, 0.5-1.0% manganese, 0.25-1.5% silicon, 13-19% chromium, and 0.8-3.0% nickel, the balance essentially being iron, this composition being machinable in the annealed condition and abrasion-resistant in the hardened condition. The alloy assumes its annealed condition by heating to above the austenitizing temperature followed by furnace ...
of whether it is pearlitic or martensitic, while an iron with M 7 C 3 eutectic carbides has a modulus of 205 to 220 GPa. MICROSTRUCTURAL CHARACTERISTICS OF HIGH CR WHITE CAST IRONS . As-cast austenitic and pearlitic microstructures . High Cr white cast irons are ferrous alloys containing chromium between 12 and 30%.
Cast iron material groups include white and grey cast irons (Fig. 13.10A). In the past two decades, the development of new cast iron materials has been seen to offer greater competition to other materials and make cast iron a contender for components not traditionally manufactured from this material [4,5,10,11] .
vides cast irons into four basic types: white iron, gray iron, ductile iron, and malleable iron. As indicated above, white iron and gray iron derive their names from the appearance of their respec-tive fracture surfaces. Ductile iron derives its name from the fact that, in the as-cast form, it exhibits measurable ductility. By contrast, neither
Melting point of gray cast iron – ASTM A48 steel is around 1260°C. Melting point of martensitic white cast iron (ASTM A532 Class 1 Type A) is around 1260°C. Melting point of malleable cast iron – ASTM A220 is around 1260°C. Melting point of ductile cast Iron – …
Jul 13, 2021· The Heat Capacity of White Cast Iron constant displays the value of the heat capacity for martensitic white cast iron ASTM A532 Class 1 Type A (0.540 J/g K).. Heat capacity, or thermal capacity, is defined as the amount of heat to be supplied to an object to produce a unit change in its temperature.The SI unit of heat capacity is joule per kelvin. The thermal capacity of white cast iron is …
Jul 26, 2007· Both are martensitic white cast iron ASTM A532 Class II type A. The surface are harder then the its core. The highest hardness on the surface are 720,82 kg/mm2 (type A) and 746,5 kg/mm2 (type B), where as lowest hardness on the core are 631,1 kg/mm2 (type A) and 544,0 kg/mm2 (type B). Microstructure investigation shows Perlit, Cementit, and ...
Feb 15, 2015· The grades of Ni-hard white cast iron alloys (ASTM-A 532) are known as abrasion resistant white iron. A large number of castings are produced with composition modifications for specific applications. In the current study, grade IC Ni–Cr–GB was modified by addition of different amounts of Mo. The tensile strength, impact energy, hardness and wear resistance of the cast samples were ...
Properties. Martensite is formed in carbon steels by the rapid cooling of the austenite form of iron at such a high rate that carbon atoms do not have time to diffuse out of the crystal structure in large enough quantities to form cementite (Fe 3 C). Austenite is gamma-phase iron (γ-Fe), a solid solution of iron and alloying elements. As a result of the quenching, the face-centered cubic ...
Jun 22, 2007· Chromium–nickel alloyed white cast irons are highly demanded products in the mining, mineral processing, metallurgical and cement industries on account of their high hardness and abrasion resistance, obtained from a microstructure characterized by a high content of primary and eutectic carbides dispersed in a tempered martensitic phase [1, 2].The currently increasing request demand …
PENGARUH VISKOSITAS MEDIA CELUP TERHADAP KEKERASAN DAN STRUKTUR MIKRO MARTENSITIC WHITE CAST IRON ASTM A532 artikel Jp Teknik Mesin dd 2011 Edit. Abstract: ... Spesimen besi tuang putih martensitik ASTM A532 merck Cr 12, CR 17, CR 21 dengan ukuran 15 mm x 10 mm x 10 mm, selanjutnya dilakukan proses uji komposisi, heat teatment dengan suhu ...
Hardness of White Cast Iron – Ni-Cr-HC Martensitic White Cast Iron. Brinell hardness of gray cast iron martensitic white cast iron (ASTM A532 Class 1 Type A) is approximately 600 MPa. In materials science, hardness is the ability to withstand surface indentation …
Sep 14, 2021· Martensitic nickel white iron. ASTM A532-I is a class of martensitic nickel white iron. In low-alloy white iron, a matrix is made of pearlite. Pearlite is relatively soft and has low wear resistance. To increase the wear resistance of white cast iron, the Pearlitic matrix is shifted to martensite by introducing Nickel and Chromium in it.
For example, Ni-Cr-HC martensitic white cast iron (Nickel-Chrome-High Carbon Alloy), ASTM A532 Class 1 Type A, is martensitic white cast iron, in which nickel is the primary alloying element because, at levels of 3 to 5%, it is effective in suppressing the transformation of the austenite matrix to pearlite, thus ensuring that a hard ...
High-chromium white cast iron for wear resistant pumps. Corrosion resistant grade: well suited for wearing applications in alkaline and slightly acidic condition. F0207 EXR ASTM A532 III A level 2 (5.5610) 2.0-3.3 23.0-30.0 max. 2.5 max. 3.0 max. 1.2 Si 1.5 max Mn 2.0 max min 650 EMW-M High-chromium white cast iron for wear resistant pumps.
Cast iron is a group of iron-carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its colour when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the ...
Ultimate tensile strength of gray cast iron (ASTM A48 Class 40) is 295 MPa. Ultimate tensile strength of martensitic white cast iron (ASTM A532 Class 1 Type A) is 350 MPa. Ultimate tensile strength of malleable cast iron – ASTM A220 is 580 MPa. Ultimate tensile strength of ductile cast Iron – ASTM A536 – 60-40-18 is 414 Mpa (>60 ksi).
Specification ASTM A 532 covers the compositions and hardnesses of two general classes of high chromium white cast irons. The high chromium white cast iron (Class II of ASTM A 532) contain 11 to 23% Cr and up to 3.5% Mo and can be supplied either as-cast with an austenitic or austenitic-martensitic matrix, or heat treated with a martensitic ...
While low-alloy white iron castings, which have alloy content below 4%, develop hardnesses in the range of 350 to 550 HB, the high-alloy irons range in hardness is from 450 to 800 HB. Specification ASTM A 532 covers the composition and hardness of the abrasion-resistant white iron grades. Many castings are ordered according to these specifications.
Sep 01, 2004· The third alloy (T1) also falls in the same ASTM specification, but it contains 3.3 wt. pct. Ni. ... makes high Cr white cast irons (WCIs) particularly attractive for applications in the grinding, milling, and pumping apparatus used to process hard materials. Hypoeutectic, eutectic, and hypereutectic cast iron compositions, containing either 15 ...
White iron Gray cast ... Martensitic white iron (Ni-Hard) Wear resistant I I High-chromium iron Ferritic (11-28% Cr) Wear, corrosion, and heat resistant f ASTM A 532 Fig. 2 I 5O/o Si iron (Silal),
Melting point of gray cast iron – ASTM A48 steel is around 1260°C. Melting point of martensitic white cast iron (ASTM A532 Class 1 Type A) is around 1260°C. Melting point of malleable cast iron – ASTM A220 is around 1260°C. Melting point of ductile cast Iron – …
martensitic structure (usually containing significant amounts of retained austenite) will develop upon cooling in the mold. Chromium is included in these alloys,atlevels from1.4 to4%to ensure that the irons solidify carbidic (i.e., to counteract the graphitizingeffectofnickel). Typical microstructure of class I type A nickel-chromium white cast ...
Jul 31, 2020· Melting Point of White Cast Iron – Ni-Cr-HC Martensitic White Cast Iron. Melting point of martensitic white cast iron (ASTM A532 Class 1 Type A) steel is around 1260°C. In general, melting is a phase change of a substance from the solid to the liquid phase. The melting point of a substance is the temperature at which this phase change occurs
Heat Treatment or Nickel-Chromium White Irons. Nickel-chromium white iron castings are given a stress-relief heat treatment because, properly made, they have a martensitic matrix structure, as-cast. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h.
Sep 22, 2016· Understanding Chrome White Iron Posted by Penticton Foundry on September 22, 2016. In several of our datasheets, such as our datasheet on ASTM A532 Class II Type D, we get specific about each alloy and its mechanical and physical properties.In fact, to see each datasheet click on the links on our chrome white iron webpage.. This blog, in contrast, contains a generic overview …
Jan 16, 2018· Heat Treatment Tips and Notes for ASTM A532 Austenitization Austenitization must be done to castings made from chrome white iron to ensure a martensitic matrix and provide the highest toughness and abrasion resistance …