8/12/2019 Asme CCase 1997-4

1/2

87

Asme BPVC Code Cases 1998 Edition CCASE11997 06-15-98 12:58:40

CASE

1997-4CASES OF ASME BOILER AND PRESSURE VESSEL CODE

Approval Date: November 25, 1992

See Numeric Index for expiration and any reafrmation dates.

Case 1997-4

UNS N08367 MaterialSection VIII, Division 1

Inquiry: Under what conditions may solution an-nealed UNS N08367 material with the chemical compo-sition listed in Table 1 and the tensile propertieslisted in Table 3, and otherwise conforming to therequirements of Specications SB-366, SB-462, SB-564, SB-675, SB-676, SB-688, SB-690, or SB-691, asapplicable for the product form (see Table 2), be usedin the construction of vessels and parts under the rulesof Section VIII, Division 1?

Reply: It is the opinion of the Committee that thematerial described in the Inquiry may be used for bothwelded and unwelded construction under the rules of Section VIII, Division 1, provided the following addi-tional requirements are met.

(a) The maximum allowable design stress values intension shall be those listed in Table 4.

(b) For external pressure design, Fig. NFN-12 of Section II, Part D shall be used.

(c) Welding Procedure Qualications and perform-ance qualications shall be conducted as prescribed in

Section IX. The material shall be considered to be P-No. 45.

(d) Heat treatment after forming or welding is neitherrequired nor prohibited. However, if heat treatment isapplied, the solution annealing treatment shall consistof heating to a minimum temperature of 2025F andthen quenching in water or rapidly cooling by othermeans.

This is Electrontic File Page # 87

(e) All other requirements of Section VIII, Division

1, Part UNF, as applicable, shall apply.(f) The material shall be identied with this Casenumber, and the Case number shall be shown on theManufacturers Data Report.

TABLE 1CHEMICAL REQUIREMENTS

Product Analysis Variations,Under min. or Over

Heat Analysis max. of the HeatElement Limit, %Wt Analysis Limit

Carbon, max. 0.03 0.01Manganese, maxc. 2.00 0.04Phosphorus, max. 0.040 0.005Sulfur, max. 0.030 0.005Silicon, max. 1.00 0.05Chromium 20.022.0 0.2Nickel 23.525.5 0.2Molybdenum 6.07.0 0.1Nitrogen 0.180.25 0.01Iron [Note (1)] Balance . . .

NOTE:(1) Determined arithmetically by difference.

TABLE 2PRODUCT SPECIFICATION

Fittings SB-366Forgings SB-462Forgings SB-564Welded pipe SB-675Welded tube SB-676Plate, sheet, strip SB-688Seamless pipe and tube SB-690Rod, bar, wire SB-691

8/12/2019 Asme CCase 1997-4

2/2

88

Asme BPVC Code Cases 1998 Edition CCASE11997 06-15-98 12:58:40

CASE (continued)

1997-4CASES OF ASME BOILER AND PRESSURE VESSEL CODE

TABLE 3MECHANICAL PROPERTIES

Forgings, Bar,Plate, Smls. Pipe, Wld. Pipe, Rod, Welded

Sheet, Strip Smls. Tube Wire Tube

Yield strength, 0.2% offset,min., ksi

Under 3 16 in. thick 46 46 45 453 16 to 3 4in., incl. 45 46 45 45Over 3 4 in. thick 45 46 45 45

Tensile strength, min., ksiUnder 3 16 in. thick 104 104 95 1003 16 to 3 4 in., incl. 100 104 95 100Over 3 4in. thick 95 104 95 100

Elongation in 2 in.,or 4 D , min., % 30 30 30 30

TABLE 4MAXIMUM ALLOWABLE DESIGN STRESS VALUES IN TENSION, ksi

Minimum Specied Mechanical PropertiesFor Metal

Temperature Not 46 YS, 45 YS, 45 YS, 46 YS, 45 YS, 45 YS,Exceeding, F 104 TS 100 TS 95 TS 104 TS 100 TS 95 TS

100 26.0 25.0 23.8 26.2 [Note (1)] 25.0 [Note (1)] 23.8 [Note (1)]200 26.0 25.0 23.8 26.0 [Note (1)] 25.0 [Note (1)] 23.8 [Note (1)]300 24.3 23.7 22.5 24.5 [Note (1)] 23.7 [Note (1)] 22.5 [Note (1)]400 22.7 22.2 21.4 23.5 [Note (1)] 22.6 [Note (1)] 21.4 [Note (1)]500 20.9 20.4 20.4 22.8 [Note (1)] 22.0 [Note (1)] 20.9 [Note (1)]600 19.0 19.5 19.5 22.3 [Note (1)] 21.7 [Note (1)] 20.4 [Note (1)]650 19.3 18.9 18.9 22.1 [Note (1)] 21.3 [Note (1)] 20.2 [Note (1)]700 19.3 18.6 18.6 21.9 [Note (1)] 21.1 [Note (1)] 20.0 [Note (1)]750 18.7 18.3 18.3 21.8 [Note (1)] 21.0 [Note (1)] 19.9 [Note (1)]800 18.4 18.0 18.0 21.7 [Note (1)] 20.9 [Note (1)] 19.8 [Note (1)]

GENERAL NOTE: For welded pipe and tube, a factor of 0.85 must be applied.NOTE:(1) Note G7 of Table 1B in Section II, Part D shall apply.

This is Electrontic File Page # 88