ASME SA-335/ ASTM A335 Gr. P11 Applied to BPVC

Seamless pipes made of ASME SA-335/ ASTM A335 Grade P11 can be used for applications designed in accordance with a series of ASME Boiler & Pressure Vessel Codes. It has the nominal chemical composition of 1.25Cr-0.5Mo-Si and UNS number of K11597. The ASTM A335 P11 seamless pipe can be applied to ASME BPVC Section I, Section III, and Section VIII.

Maximum Temperature Limits

ASME Section	Max. Temp. °C
I	649
III Cl. 2 & 3	371
VIII Div. 1	649
III Div. 1 Cl. 1 & MC	371
III Div. 3 Cl. TC & SC	371
VIII-2 Cl. 1	482
VIII Div. 2	649

*The maximum use temperature limits for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes in different Sections of ASME BPVC.

Maximum Allowable Stress

Temp.	S
40	118
65	118
100	118
125	118
150	118
200	116
250	112
300	109
325	108
350	106
375	104
400	102
425	99.5
450	96.9
475	94.7
500	72.9
525	51.0
550	36.7
575	25.1
600	17.6
625	12.4
650	8.08

*Maximum allowable stress values for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes used for Section I; Section III, Classes 2 and 3; Section VIII, Division 1. Extraced from Table 1A of Section II, Part D.
*S & Temp.: maximum allowable stress, MPa, for metal temperature, °C, not exceeding.

Temp.	S
40	138
65	131
100	126
125	124
150	121
175	119
200	116
225	115
250	113
275	111
300	109
325	107
350	106
375	104
400	102
425	99.6
450	97.2
475	94.5
500	73.7
525	52.0
550	36.3
575	25.2
600	17.6
625	12.3
650	8.12

*Maximum allowable stress values for ASME SA-335/ ASTM A335 Gr. P11 seamless pipes used for Section VIII, Division 2; extracted from Table 5A of Section II, Part D.
*S & Temp.: maximum allowable stress, MPa, for metal temperature, °C, not exceeding.

Design Stress Intensity

Temp. °C	Design Stress Intensity, MPa
40	138
65	132
100	127
125	124
150	121
200	116
250	112
300	109
325	108
350	106
375	104
400	102
425	99.5
450	97.0
475	94.5
500	92.0

*Design stress intensity for ASME SA-335/ ASTM A335 P11 seamless pipes used for Section III, Division 1, Classes 1 and MC; Section III, Division 3, Classes TC and SC; and Section VIII, Division 2, Class 1.

Tensile Strengths at Elevated Temperatures

Temp. °C	Tensile Strength MPa
40	414
100	414
150	414
200	414
250	414
300	414
325	414
350	414
375	414
400	414
425	414
450	404
475	390
500	371
525	349

*The tensile strengths of ASME SA-335/ ASTM A335 P11 at elevated temperatures for design calculation purpose. The miminum tensile strength at room temperature is 415 MPa. All values are extracted from Table U of Section II, Part D.

Yield Strengths at Elevated Temperatures

Temp. °C	Yield Strength MPa
40	207
65	197
100	190
125	185
150	181
175	178
200	175
225	172
250	169
275	166
300	164
325	161
350	158
375	155
400	153
425	149
450	145
475	142
500	137
525	132

*The yield strengths of ASME SA-335/ ASTM A335 P11 at elevated temperatures for design calculation purpose. The miminum yield strength at room temperature is 205 MPa. All values are extracted from Table Y-1 of Section II, Part D.