1、Designation: A 101 04Standard Specification forFerrochromium1This standard is issued under the fixed designation A 101; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates th
2、e year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers two types of ferrochromiumdesignated as high carbon and low carbon, the latter includingnitrogen-bearing and vacuum grades.1.2 The values sta
3、ted in inch-pound units are to be regardedas the standard. The SI units given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2A 1025 Specification for Ferroalloys, Common Require-mentsE 363 Test Methods for Chemical Analysis of Chromiumand Ferrochromium3. General Co
4、nditions for Delivery3.1 Materials furnished to this specification shall conform tothe requirements of Specification A 1025, including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the general requirements ofSpecification A 1025 constitutes nonconforma
5、nce with thisspecification. In case of conflict between the requirements ofthis specification and Specification A 1025, this specificationshall prevail.4. Chemical Composition4.1 The grades shall conform to the requirements as tochemical composition specified in Table 1. The manufacturershall furnis
6、h an analysis of each shipment showing the ele-ments specified in Table 1.5. Size5.1 The various grades are available in sizes as listed inTable 2.5.2 The sizes listed in Table 2 are typical, as shipped fromthe manufacturers plant. These alloys exhibit varying degreesof friability; therefore, some a
7、ttrition may be expected intransit, storage, and handling. A quantitative test is not avail-able for rating relative friability of ferroalloys. A code systemhas been developed, therefore, for this purpose, and a numberrating for each product type is shown in the last column ofTable 2. Definitions ap
8、plicable to these code numbers are givenin Specification A 1025.6. Chemical Analysis6.1 The chemical analysis method shall be agreed upon bythe purchaser and supplier.6.2 In cases of discrepancy, Test Methods E 363 shall beused for referee purposes.7. Keywords7.1 ferroalloys; ferrochromium; high car
9、bon; low carbon;nitrogen-bearing; vacuum low carbon1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved May 1, 2004. Published May 2004. Originallya
10、pproved in 1925. Last previous edition approved in 1993 as A 101 93 (2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe
11、 ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.SUPPLEMENTARY REQUIREMENTSThe composition shall be limited to the requirements of Table S1.1 in addition
12、to those in Table 1.Upon request of the purchaser, the manufacturer shall furnish an analysis for any of these elements ona cumulative basis over a period mutually agreed upon by the manufacturer and the purchaser.TABLE 1 Chemical RequirementsType FerrochromiumComposition, %Grade Chromium Carbon Sil
13、iconSulfur,maxPhosphorus,maxNitrogenHigh carbon ABC51.056.056.062.062.0 min6.08.06.08.06.08.06.0 max8.014.03.0 max0.0400.0500.0500.0300.0300.030.Low carbon A 60.067.0 0.025 max 1.08.0 0.025 0.030 . . .B 67.075.0 0.025 max 1.0 max 0.025 0.030 . . .C 67.075.0 0.050 max 1.0 max 0.025 0.030 . . .D 67.07
14、5.0 0.75 max 1.0 max 0.025 0.030 . . .Vacuum low carbon EG66.070.063.068.00.015 max0.050 max2.0 max2.0 max0.0300.0300.0300.030.5.06.5Nitrogen bearing 62.070.0 0.10 max 1.0 max 0.025 0.030 1.05.0TABLE 2 Standard Sizes and TolerancesProduct Standard Sizes TolerancesFriabilityRatingsFerrochromium:High-
15、carbon 8 in. (200 mm) by 4 in. (100 mm) 10 in. (250 mm), max 10 %, max, passing 4-in. (100-mm) sieve 46 in. (150 mm) by down 10 %, max, retained on 6-in. (150-mm) sieve5 in. (125 mm) by 2 in. (50 mm) 10 %, max, retained on 5-in. (125-mm) sieve 10 %, max, passing 2-in. (50-mm) sieve4 in. (100 mm) by
16、in. (12.5 mm) 10 %, max, retained on 4-in. (100-mm) sieve 10 %, max, passing12-in. (12.5-mm) sieve3 in. (75 mm) by 1 in. (25 mm) 10 %, max, retained on 3-in. (75-mm) sieve 10 %, max, passing 1-in. (25-mm) sieve3 in. (75 mm) by14 in. (6.3 mm) 10 %, max, retained on 3-in. (75-mm) sieve 10 %, max, pass
17、ing14-in. (6.3-mm) sieve14 in. (6.3 mm) by down 5 %, max, retained on14-in. (6.3-mm) sieve8 mesh (2.36 mm) by down 5 %, max, retained on U.S. No. 8 (2.36-mm)sieveLow-carbon 8 in. (200 mm) by down 10 in. (250 mm), max 18 in. (200 mm) by 4 in. (100 mm) 10 %, max, retained on 8-in. (200-mm) sieve 5 %,
18、max, passing 4-in. (100-mm) sieve4 in. (100 mm) by down 10 %, max, retained on 4-in. (100-mm) sieve3 in. (75 mm) by 1 in. (25 mm) 10 %, max, retained on 3-in. (75-mm) sieve 10 %, max, passing 1-in. (25-mm) sieve8 mesh (2.36 mm) by down 5 %, max, retained on U.S. No. 8 (2.36-mm)sieveVacuum lowcarbonb
19、rick or pellet designated by manufacturerA101042SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this standard since the last version(A 101 93 (2000) that may impact the use of this standard.(1) Practice E 29, Test Methods E 31, and Practices E 32 wereremoved from 2
20、.(2) Specification A 1025 was added to 2.(3) Changed Ordering Information to General Conditions forDelivery.(4) Revised 4 and 5.(5) Removed sections on Sampling, Inspection, Rejection, andPackaging.(6) Added Supplementary Requirements.(7) Moved Table S1.1 into the Supplementary Requirementssection a
21、nd renumbered other tables appropriately.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and th
22、e riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision o
23、f this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should
24、make your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtaine
25、d by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE S1.1 Supplementary Chemical RequirementsTypeComposition, max, %High Carbon Low Carbon Vacuum Low CarbonANitrogen BearingGrade A, B C A
26、ll Grades E G Nitrogen 0.050 0.050 0.12 0.050Manganese 0.75 0.75 0.75 0.75 0.75 0.75Nickel 0.50 0.50 0.50 0.50 0.50 0.50Vanadium 0.50 0.50 0.50 0.50 0.50 0.50Copper 0.050 0.050 0.050 0.050 0.050 0.050Molybdenum 0.050 0.050 0.050 0.050 0.050 0.050Columbium 0.050 0.050 0.050 0.050 0.050 0.050Tantalum
27、0.050 0.050 0.050 0.050 0.050 0.050Cobalt 0.10 0.10 0.10 0.10 0.10 0.10Aluminum 0.25 0.25 0.10 0.10 0.10 0.10Titanium 0.50 0.30 0.050 0.050 0.050 0.050Zirconium 0.050 0.050 0.01 0.01 0.01 0.01Antimony 0.01 0.01 0.01 0.01 0.01 0.01Arsenic 0.005 0.005 0.005 0.005 0.005 0.005Lead 0.005 0.005 0.005 0.00
28、5 0.005 0.005Tin 0.005 0.005 0.005 0.005 0.005 0.005Zinc 0.005 0.005 0.005 0.005 0.005 0.005Boron 0.005 0.005 0.005 0.005 0.005 0.005Silver 0.005 0.005 0.005 0.005 0.005 0.005Bismuth 0.005 0.005 0.005 0.005 0.005 0.005AThe inert oxide (SiO2+ CaO + MgO + Al2O3) content of vacuum low-carbon ferrochromium shall be specified as 3.50 % max.A101043
