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The requirements for the classification of low alloy steel electrodes and rods for gas metal arc welding, gas tungsten arc welding, and plasma arc welding. It includes chemical composition requirements, tension test requirements, and impact test requirements for various types of electrodes and rods.
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Other AWS^ UNS^
Elements c^ d^ Classification NumberC^ Mn^ Si^ P^ S^
e^ Ni Cr Mo V Ti Zr Al CuTotalCarbon-Molybdenum Steel Electrodes and Rods ER70S-A1^ K11235^ 0.12^ 1.30^ 0.30–0.70^ 0.025^ 0.^
0.20^ —^ 0.40–0.65^ —^ —^ —^ —^ 0.35^ 0.50 Chromium-Molybdenum Steel Electrodes and Rods ER80S-B2^ K20900^ 0.07–0.12^ 0.40–0.70^ 0.40–0.70^ 0.025^ 0.^
f^ ER80S-B6S50280^ 0.10^ 0.40–0.70^ 0.50^ 0.025^ 0.^
g^ ER80S-B8 S50480^ 0.10^ 0.40–0.70^ 0.50^ 0.025^ 0.^
h,i^ ER90S-B9 S50482^ 0.07–0.13^ 1.25^ 0.15–0.30^ 0.010^ 0.^ 1.00^ 8.00–9.50^ 0.80–1.10^ 0.15–0.25^ —^ —^ 0.04^ 0.20^ 0.50 Nickel Steel Electrodes and Rods ER80S-Ni1^ K11260^ 0.12^ 1.25^ 0.40–0.80^ 0.025^ 0.025^ 0.80–1.
ER80S-Ni2^ K21240^ 0.12^ 1.25^ 0.40–0.80^ 0.025^ 0.025^ 2.00–2.
ER80S-Ni3^ K31240^ 0.12^ 1.25^ 0.40–0.80^ 0.025^ 0.025^ 3.00–3.
—^ —^ —^ —^ —^ —^ 0.35^ 0.50 Manganese-Molybdenum Steel Electrodes and Rods j ER80S-D2K10945^ 0.07–0.12^ 1.60–2.10^ 0.50–0.80^ 0.025^ 0.^
ER90S-D2^ Other Low-Alloy Steel Electrodes and Rods ER100S-1^ K10882^ 0.08^ 1.25–1.80^ 0.20–0.55^ 0.010^ 0.010^ 1.40–2.
kNot Specified 566 NOTES:a.^ The filler metal shall be analyzed for the elements for which values are shown in this table. If the presence of other elements is indicated in the course of this work, the amount of those elements shallbe determined to ensure that their total (excluding iron) does not exceed the limits specified for “Other Elements, Total.”b.^ Single values are maximum.c.^ The suffixes B2, Ni1, etc., designate the chemical composition of the electrode and rod classification.d.^ SAE/ASTM Unified Numbering System for Metals and Alloys.e.^ Copper due to any coating on the electrode or rod plus the copper content of the filler metal itself, shall not exceed the stated limit.f.^ Similar to former class ER502 in AWS Specification A5.9-81.g.^ Similar to former class ER505 in AWS Specification A5.9-81.h.^ Niobium (Columbium) 0.02–0.10%i.^ Nitrogen 0.03–0.07%j.^ This composition was formerly classified E70S-1B in AWS Specification A5.18-69.k.^ In order to meet the requirements of the “G” classification, the electrode must have a minimum of one or more of the following: 0.50 percent nickel, 0.30 percent chromium, or 0.20 percentmolybdenum. Composition shall be reported; the requirements are those agreed to by the purchaser and supplier.docsity.com
e.f. Not specified (As agreed to between purchaser and supplier).These classifications were previously ER80S-B2, E80C-B2, ER90S-B3L, and E90C-B3L respectively in AWS A5.28–79. The strength levelshave been adjusted downward as shown, in order to accurately reflect the capability of the classification’s chemical composition ranges. (^568) docsity.com
ER80S-D2ER90S-D2E90C-D2ER100S-1ER110S-1ER120S-1ERXXXS-GEXXC-GNOTES:a.b.this specification, an observed or calculated value shallbeyield strength, and to the “nearest unit” in the last (^) 5.2 Both the highest and lowest of the five test values obtained shallbe disregarded in computing the impact strength.maining three values shall equal or exceed 20 ft-lbf (27 J); oneof the three remaining values may be lower than 20 ft-lbf (27 J)but not lower than 15 ft-lbf (20 J). The average of the three shallnot be less than the 20 ft-lbf (27 J) specified.maining three values shall equal or exceed 50 ft-lbf (68 J); oneof the three remaining values may be lower than 50 ft-lbf (68 J)but not lower than 40 ft-lbf (54 J). The average of the three shallnot be less than the 50 ft-lbf (68 J) specified.Postweld heat treated in accordance with Table 7.rounded to the nearest 1000 psi for tensile andFor classifications requiring 20 ft-lbf (27 J); Two of the re-For classifications requiring 50 ft-lbf (68 J): Two of the re- For the purpose of determining conformance with 20 ft·lbf at −20°F(27 J @ −29°C)50 ft·lbf at −60°F(68 J @ −51°C)purchaser and supplierAs agreed between As-WeldedAs-Welded— right-handlimiting value for other quantities in accordance withthe rounding-off method given in ASTM E29, place of figures used in expressing Recom- the 569
mended Practice for Using Significant Digits in TestData to Determine Conformance with Specifications. PART B — TESTS, PROCEDURES, ANDREQUIREMENTS6. specified in Table 5. The purpose of these tests is todetermine the chemical composition, the mechanicalproperties, and soundness of the weld metal. The basemetal for the weld test assemblies, the welding andtestingrequired are given in Sections 8 through 12.Section 13, Diffusible Hydrogen Test, is not requiredfor classification [see note (a) of Table 5]. 7. that test shall be repeated twice. The results of bothretests shall meet the requirement. Specimens for retestmay be taken from the original test assembly or fromone or two new test assemblies. For chemical analysis, (^) 6.1 6.2 If the results of any test fail to meet the requirement, Summary of TestsRetest TheTheprocedures testsoptional required to testbe foremployed,for diffusibleeach classificationand hydrogen the results arein 4 retest need be only for those specific elements thatfailed to meet the test requirement. If the results ofone or both retests fail to meet the requirement, thematerial under test shall be considered as not meeting therequirements of this specification for that classification.In the event that, during preparation or after completionof any test, it is clearly determined that prescribed orproper procedures were not followed in preparing theweld test assembly or test specimen(s), or in conductingthe test, the test shall be considered invalid, withoutregard to whether the test was actually completed, orwhether test results met, or failed to meet, the require-ment,prescribed procedures. In this case, the requirement fordoubling the number of test specimens does not apply. 8. two may be required (depending on the electrode —solid as opposed to composite — and the manner inwhich the sample for chemical analysis is taken), asspecified in Table 5. They are as follows: (^4) for Testing and Materials (ASTM), 100 Barr Harbor Drive, Consho-hocken, PA 19428-2959. (^) ASTM specifications may be obtained from the American Society (^) 8.1 (^) Weld Test Assemblies At least one weld test assembly is required, andthat test shall be repeated, following proper docsity.com
ties and soundness of the weld metal for both compositeand solid electrodesthe weld metal from composite stranded and compositemetal cored electrodescomposite electrodes may be taken from the reducedsectionspecimen or from the corresponding location in thegroove weld in Fig. 1, thereby avoiding the need tomake a weld pad. Alternatively, the sample from thegroove weld may be taken from any location in theweld metal above the tension test specimen. In caseof dispute, the weld pad in Fig. 2 shall be the refereemethod.as prescribed in 8.3, 8.4, and 8.5. The base metal foreach assembly shall be as required in Table 6, andshall meet the requirements of the ASTM specificationshown there, or an equivalent specification. Testing ofthe assembly shall be as prescribed in 9.2, 9.3, andSections 10 through 12.^ (1) (2) The sample for chemical analysis of weld metal from 8.2^ The groove weld in Fig. 1 for mechanical proper-The weld pad in Fig. 2 for chemical analysis ofPreparation of each weld test assembly shall be of the fractured all-weld-metalPART C — SPECIFICATIONS FOR WELDING RODS,ELECTRODES, AND FILLER METALS tension test^ SFA-5. be prepared and welded as specified in Fig. 1, usingbase metal of the appropriate type specified in Table6, and the preheat and interpass temperature specifiedin Table 7. The electrode used shall be 0.045 in. (1.1mm) ormanufacturer produces that is closest to one of these,if these sizes are not produced).shall be restrained (or preset) during welding to preventwarpage in excess of 5 degrees. An assembly that haswarpeddiscarded. It shall not be straightened. The test assemblyshall be tack welded, and welding shall begin at thepreheat temperature specified in Table 7.the remainder of the weld. Should it be necessary tointerrupt welding, the assembly shall be allowed tocool in still air to room temperature. The assemblyshall be preheated to the temperature shown in Table7 before welding is resumed. When welding has beencompleted and the assembly has cooled, the assemblyshall be prepared and tested as specified in Sections10,treated condition, as specified in Tables 3 and 4.^ 8.3 Groove Weld Welding shall be in the flat position, and the assemblyThis interpass temperature shall be maintained for 11, and 8.3.1 more 1^ ⁄ 16 For all classifications, a test assembly shall in. (1.6 mm) size (or the size that the (^) 12 in the as-welded or postweld heat-than 5 degrees from plane shall be postweld heat-treated before removal of mechanical test^ 8.3.2^ When required, the test assembly shall be 571
specimens. This postweld heat treatment may be doneeither before or after the radiographic examination.not higher than 600°F (320°C) when the test assemblyis placed in it. The heating rate, from that point tothe specified holding temperature in Table 7, shall notexceed 400°F per hour (220°C per hour).at the temperature specified in Table 7 for 1 hour (−0,+15 minutes).been completed, the assembly shall be allowed to coolin the furnace to a temperature below 600°F (320°C)at a rate not exceeding 350°F (190°C) per hour. Theassembly may be removed from the furnace at anytemperature below 600°F (320°C) and allowed to coolin still air to room temperature. Testing of the assemblyshall be as specified in Sections 10 through 12.composite stranded and composite metal cored elec-trodes as shown in Fig. 2, except when, as permittedin 8.1, the sample for analysis is taken from the grooveweld (Fig. 1) or the fractured tension test specimen. 8.4 Weld Pad. 8.3.2.1 8.3.2.2 8.3.2.3 The furnace shall be at a temperatureThe test assembly shall be maintainedWhen the one hour holding time has A weld pad shall be prepared using Base metal of any convenient size which will satisfythe minimum requirements of Fig. 2, and is of a typespecified in Table 6, shall be used as the base for theweld pad. The surface of the base metal on which thefiller metal is deposited shall be clean. The pad shallbe welded in the flat position with multiple layers toobtain undiluted weld metal (4 layers minimum thick-ness). The electrode size shall be 0.045 in. (1.1 mm)orproduces that is closest to one of these, if these sizesare not produced. The preheat temperature shall notbe less than 60°F (16°C) and the interpass temperatureshall not exceed that specified in Table 7. Any slagshall be removed after each pass. The pad may bequenched in water between passes (temperature of thewater is not specified). The dimensions of the completedpad shall be as shown in Fig. 2. Testing of this assemblyshall be as specified in 9.2 and 9.3. The results shallmeet the requirements of 9.4. 9. prepared for chemical analysis. Solid filler metal, whenanalyzed for elements that are present in a coating(copper flashing, for example), shall be analyzed without (^) 9.1 (^1) ⁄ (^16) Chemical Analysis (^) A sample of the solid electrode or rod shall bein. (1.6 mm), or the size that the manufacturer removing the coating. When the filler metal is analyzeddocsity.com
FIG. 1 GROOVE WELD TEST ASSEMBLY FOR MECHANICAL PROPERTIES AND SOUNDNESS (^572) docsity.com
(^574) docsity.com