KEPIC 적용사례 : MD-C-039-1(N-249-14)N-249... · 2015. 1. 9. · md-c-039-1(n-249-14) kepic 적용사례 : md-c-039-1(n-249-14) (승인일자 : 2010. 8. 31) 제목 : 용접없이

MD-C-039-1(N-249-14) MD-C-039-1(N-249-14)

적용사례 KEPIC : MD-C-039-1(N-249-14)승인일자 ( : 2010. 8. 31)

재 승인일자 ( : 2015. 12. 01)

제목 용접없이 제조되는 등급: KEPIC-MNF, 1 , 등급 등급 및 금속격납용기 기기 2 , 3

지지물의 추가 재료(KEPIC-MN)

KEPIC Code Case : MD-C-039-1(N-249-14)(Approval Date : 8. 31, 2010)

(Reaffirmation date : 1.12, 2015)

Subject : Additional Materials for MNF, Class 1,

2, 3, and M C Supports Fabricated

Without Welding (KEPIC-MN)

Inquiry :

What materials in addition to those listed in

KEPIC-MDP, Tables IA, IB, A, B and , may be

used for KEPIC-MN, Classes 1, 2, 3, or MC supports

constructed to the requirements of MNF when the items

are fabricated without welding?

Reply :

It is the opinion of the Committee that the additional

materials, design stress intensity and allowable stress

values, the yield strength, and the ultimate tensile strength

values(1), listed in Tables 1, 2, 3, 4, and 5 of this Code

Case may be used in the construction of Class 1, 2, 3,

and MC supports fabricated without welding for

(1) The tabulated values of tensile strength and yield strength are those which the Committee believes are suitable for use in design calculations required by KEPIC-MN. At the temperatures above room temperature, the values of tensile strength tend toward an average or expected value which may be as much as 10 % above the tensile strength trend curves adjusted to the minimum specified room temperature tensile strength. At temperatures above room temperature, the yield strength values correspond to the yield strength trend curve adjusted to the minimum specified room temperature yield strength. Neither the tensile strength nor the yield strength values correspond exactly to either "average" or "minimum," as these terms are applied to a statistical treatment of a homogenous set of data.

Neither the ASME or ASTM Material Specifications nor the rules of KEPIC-MN, require elevated temperature testing for tensile or yield strengths of production material for use in Code components. It is not intended that results of such tests, if performed, be compared with these tabulated tensile and yield strength values for ASME Code acceptance/rejection purposes for materials. If some elevated temperature test results on production material appear lower than the tabulated values by a large amount (more than the typical Variability of material suggesting the possibility of some error), further investigation by retest or other means should be considered.

MD-C-039-1(N-249-14) MD-C-039-1(N-249-14)

KEPIC-MN, in addition to those listed in Table MNF

2121.

The following additional requirements shall apply.

(1) The requirements of KEPIC-MNF shall be met

except as modified by this Case.

(2) Repair welding is not permitted on carbon and low

alloy steels containing more than 0.35 % carbon, nor on

precipitation hardened of age-hardened steels, nor on the

free machining steels permitted in (3) below, unless

permitted by the material specification. Weld repairs of

base material shall be made on annealed material and such

repaired material shall be reheat treated in accordance with

the material specification.

(3) When the Material column in Tables 1 through 5

references AISI grades, only materials meeting the

chemical composition requirements of the specific AISI

grades listed shall be used, with the exception that 0.60 %

maximum silicon is permitted for castings. Free machining

modifications of the specific AISI grades listed may be

used at the same design stress intensities, allowable

stresses and yield strengths of the reference grades but

their use is limited to 400 (200 ) maximum

temperature.

(4) When the ASTM specification referenced in Tables

1 through 4 does not specify minimum tensile and yield

strengths, the values listed under the appropriate columns

shall be met by the material.

(5) The maximum measured ultimate tensile strength

(UTS) of the support material should not exceed 170 ksi

(117 MPa) in view of the susceptibility of high-strength

materials to brittleness and stress corrosion cracking,

Certain applications may exist where a UTS value of up

to 190 ksi (131 MPa) could be considered acceptable for

a material. Under this condition, the Design Specification

should specify impact testing for the material, and shall

include requirements for the consideration of the effects of

sustained loads, environment, and heat treatment on the

susceptibility to stress corrosion cracking of these high

strength materials.

(6) Materials in Tables 1 through 5 that are listed as an

AISI composition may be accepted as satisfying the

requirements of the ASTM specification provided the

MD-C-039-1(N-249-14) MD-C-039-1(N-249-14)

chemical requirements of the AISI specification are within

the specified range of the designated ASTM specification,

and certification of the material shall be in accordance

with the requirements of MNA 4390.

(7) The material shall be furnished with the

requirements of MNF 2600.

(8) This Case and revision number shall be listed on

the applicable documentation accompanying shipment.

표 등급 지지물에 대한 설계응력강도값1. 1 , Sm

재료분류제품형태 시방서번호 등급/

기호 클레스최소항복강도, ksi

최소 인장 강도, ksi주

각 금속온도( o 에 따른 설계응력강도F) , ksi

TABLE 1 DESIGN STRESS INTENSITY VALUES, , FOR CLASS 1 SUPPORTS


재료분류제품형태 시방서번호

등급/기호 클레스

최소항복강도, ksi



TABLE 1 DESIGN STRESS INTENSITY VALUES, , FOR CLASS 1 SUPPORTS(CONT'D)


재료분류제품형태 시방서번호

등급/기호 클레스




TABLE 1 DESIGN STRESS INTENSITY VALUES, , FOR CLASS 1 SUPPORTS(CONT'D)

표 등급 및 지지물에 대한 허용응력값2. 2, 3 MC , S

재료분류 제품형태 시방서번호등급/기호 클레스


최소인장강도,

ksi주

각 금속 온도 에 따른 허용응력( ) , ksi℉

TABLE 2 ALLOWABLE STRESS VALUES, S, FOR CLASSES 2, 3, AND MC SUPPORTS

표 등급 및 지지물에 대한 허용응력값2. 2, 3 MC , S 계속( )



최소인장강도,

ksi주


TABLE 2. ALLOWABLE STRESS VALUES, S, FOR CLASSES 2, 3, AND MC SUPPORTS(CONT'D)

표 등급 및 지지물에 대한 허용응력값2. 2, 3 MC , S 계속( )



최소인장강도,

ksi주


TABLE 2. ALLOWABLE STRESS VALUES, S, FOR CLASSES 2, 3, AND MC SUPPORTS(CONT'D)

표 등급 및 지지물에 대한 항복응력값3. 1, 2, 3 MC , Sy



극한인장강도,

ksi주

각 금속 온도 에 따른 항복강도( ) , ksi℉

TABLE 3. YIELD STRENGTH VALUES, , FOR CLASSES 1, 2, 3, AND MC SUPPORTS

표 등급 및 지지물에 대한 항복응력값3. 1, 2, 3 MC , Sy 계속( )



극한인장강도,

ksi주


TABLE 3 YIELD STRENGTH VALUES, , FOR CLASSES 1, 2, 3, AND MC SUPPORTS(CONT'D)




극한인장강도,

ksi주




항복강도

극한인장강도,

ksi주


표 등급 등급 등급 및 금속격납용기 지지물용 볼트재료에 대한 항복강도값4. 1 , 2 , 3 , Sy

재료분류 시방서번호등급/기호 클레스


인장강도, ksi주


TABLE 4 YIELD STRENGTH VALUES, , FOR BOLTING MATERIALS FOR CLASSES 1, 2, 3, AND MC SUPPORTS

표 등급 등급 등급 및 금속격납용기 지지물용 볼트재료에 대한 항복강도값4. 1 , 2 , 3 , Sy 계속( )



인장강도, ksi주


TABLE 4 YIELD STRENGTH VALUES, , FOR BOLTING MATERIALS FOR CLASSES 1, 2, 3, AND MC SUPPORTS(CONT'D)

표 등급 및 금속격납용기 기기에 대한 규정 인장강도값5. 1, 2, 3 , Su


최소항복강도,

ksi인장강도주

각 금속 온도 에 따른 규정인장강도( ) , ksi℉

제품형태

TABLE 5 ULTIMATE TENSILE STRESS VALUES, , FOR BOLTING MATERIALS FOR CLASSES 1, 2, 3, AND MC SUPPORTS

표 등급 및 금속격납용기 기기에 대한 규정 인장강도값5. 1, 2, 3 , Su 계속( )


최소항복강도,

ksi인장강도주


제품형태

TABLE 5 ULTIMATE TENSILE STRESS VALUES, , FOR BOLTING MATERIALS FOR CLASSES 1, 2, 3, AND MC SUPPORTS(CONT'D)



최소항복강도,

ksi인장강도주


제품형태

표 5. 등급 및 금속격납용기1, 2, 3 기기에 대한 규정 인장강도값 , Su 계속( )


최소항복강도,

ksi인장강도주


제품형태



최소항복강도,

ksi인장강도주


제품형태

비고

NOTES:(1) This material may be made from ASTM A 546-82(2) Over 1 in. to 2 on. incl.(3) These materials are limited for use only for component standard supports.(4) Max. BHN 215.(5) Max. BHN 225.(6) For each forging 250 lb net weight and less, the marking requirements of A 668 shall be met by a suitable code or symbol identified by the Material Manufacturer in his

Certificate of Compliance or Certified Material Test Report. The hardness test requirement may be performed only on the tensile test specimen.(7) ½ in. and under.(8) Over ½ in. to 1 in. incl.(9) By agreement between Purchaser and Material Manufacturer, these materials may be procured to the lower specified minimum ultimate tensile strength and minimum yield

strength values given in this Table.(11) 4 in. and under.(12) Over 4 in. to 7 in. incl.(13) Over 7 in. to 10 in. incl.(14) This material may be used only in fully constrained applications, such as threda inserts, so that failure of the wire would not affect the function of the component support.(16) Solution heat-treated and hardened (1325℉ for 8 hr, furnace cooled to 1150℉, held to a total of 18 hr, air cooled).(17) Half hard.(18) Hot rolled.(19) Hot finished, heat treated.(20) E4340H may be used sith the molybdenum range increased by agreement to 0.40% max.(21) The minimum specified yield strength shall be taken at 0.2% offset.(22) This material may be used only in fully constrained applications such as valve disk or flow restrictor balls or mechanical snubber parts such as gears so that failure of these

parts does not significantly affect the function of the item. Design stresses are limited to 0.4 .

(23) For bar sizes under ½ in. nominal size, this material may be ordered to A 581-80.(24) 1½ in. and under.(25) Over 1½ in. to 2½ in. incl.(26) Over 2½ in. to 4 in. incl.(27) Over 7 in. to 9½ in. incl.(28) Austenitize 1850℉ to 1950℉, oil quench, temper at 700℉ min.(29) Austenitize 1850℉ to 1950℉, oil quench, temper at 600℉ min.(30) A 564 Type XM-13 shall be modified so that age-hardening treatment shall be 1050℉ only.(31) For gages less than ¼ in. in diameter, wire to AMS 5737 may be supplied, with or without heads. These values also apply to material that has been solution treated in a

vacuum at 1650℉ for 30min and oil quenched and aged at 1325℉ for ½ to 1½ hr and are cooled. (32) The Elongation and Reduction of Area requirements for Grade 105-85 may be specified as 14% and 30%, respectively.(33) The Elongation and Reduction of Area requirements for Grade 115-95 may be specified as 11% and 25%, respectively.(34) Threaded rods only.

(35) Minimum tempering temperature shall be 850℉.(36) No yield or tensile strength specified. Assume to be the same as SA-325 Type 1bolts for nut design calculations.(37) 3 in. maximum diameter, cole drawn and tempered.(38) 10 in. maximum diameter.(39) ¼ in. to 1 in. incl.(40) Over 1 in. to 1½ in. incl.

(41) Over 1½ in. to 3 in. incl.(42) Nuts may be as listed in SA-563, Table XI.(43) Over ½ in.(44) There is no standard AISI composition 4330. By agreement with the material manufacturer, the carbon content of AISI 4340 can be ordered as 0.27% to 0.33%, the molybdenum as 0.40% to 0.60%, the vanadium as 0.04% to 0.10%, and the silicon to 0.35% max.(45) Use SA-563 nongalvanized or galvanized heavy hex Grades A,B, C, D and DH. Same allowable stresses as bolts.(46) Use SA-563 nongalvanized heavy hex Grades B, C, C3, D, DH and DH3. Same allowable stresses as bolts.(47) Use SA-563 nongalvanized heavy hex Grades C, D, and DH. Same allowable stresses as bolts.(48) Use SA-563 nongalvanized heavy hex Grades DH. and DH3. Same allowable stresses as bolts.(49) Use SA-563 nongalvanized Grades C, C3, D, DH and DH3. Same allowable stresses as bolts.(50) Use SA-563 galvanized grades DH. Same allowable stresses as bolts.(51) Use SA-563 nongalvanized ½ in. to 1½ in. Grades C, C3, D, DH and DH3. Same allowable stresses as bolts.(52) Use SA-563 galvanized ½ in. to 1½ in. Grades DH. Same allowable stresses as bolts.(53) Use SA-563 nongalvanized ½ in. to 1½ in. Grades DH and DH3. Same allowable stresses as bolts.(54) Use SA-563 nongalvanized ½ in. to 1½ in. Grades DH3. Same allowable stresses as bolts.(55) Specifications for compatible nuts are provided in SA-193 and SA-320. Nuts may also be fabricated from the same material specification as the bolts and threaded, and the same stress values may be used.(56) For compressive applications, tensile testing is not required and each size from al ot shall be accepted on the basis of hardness testing of three pieces. Each test specimen shall meet 53min. in the final heat treated condition.

(57) For SA-563 nongalvanized heavy hex Grades A, B, C, C3, D, DH, and DH3. Same allowable stresses as bolts.(58) Austenitize at 1800℉ minimum, rapid cool by forced air or oil, temper at 1300.℉ minimum.(59) The allowable stress values are based on the revised criterion of tensile strength divided by 3.5, where applicable.

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KEPIC 적용사례 : MD-C-039-1(N-249-14)N-249... · 2015. 1. 9. · md-c-039-1(n-249-14) kepic 적용사례 : md-c-039-1(n-249-14) (승인일자 : 2010. 8. 31) 제목 : 용접없이