A335 & A335M ALLOY-STEEL PIPE

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A335 & A335M ALLOY-STEEL PIPE

Categories Alloy Steel Pipe, Products, Steel tube

A335 & A335M Alloy Steel Pipe Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service1
Sizes: 1/8″ to 24”
WT Schedules: SCH 10, SCH 20, SCH 40, SCH STD, SCH 80, SCH XS to SCH 160. SCH XXS
Because of its unique material characteristics, alloy steel pipe has been widely used in many fields. It is mainly used in oil and gas industry, power industry, chemical industry, machinery manufacturing and energy field

Categories Alloy Steel Pipe, Products, Steel tube

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Chemical Requirements

Grade	UNS Designation^A	Composition, %
Grade	UNS Designation^A	Carbon	Manganese	Phosphorus max	Sulfur max	Silicon	Chromium	Molybdenum	Others
P1	K11522	0.10-0.20	0.30-0.80	0.025	0.025	0.10-0.50	/	0.44-0.65	/
P2	K11547	0.10-0.20	0.30-0.61	0.025	0.025	0.10-0.30	0.50–0.81	0.44-0.65	/
P5	K41545	0.15 max	0.30-0.60	0.025	0.025	0.50 max	4.00–6.00	0.45-0.65	/
P5b	K51545	0.15 max	0.30-0.60	0.025	0.025	1.00-2.00	4.00–6.00	0.45-0.65	/
P5c	K41245	0.12 max	0.30-0.60	0.025	0.025	0.50 max	4.00–6.00	0.45-0.65	^B
P9	K90941	0.15 max	0.30-0.60	0.025	0.025	0.25-1.00	8.00–10.00	0.90-1.10	/
P11	K11597	0.05-0.15	0.30-0.60	0.025	0.025	0.50-1.00	1.00–1.50	0.44-0.65	/
P12	K11562	0.05-0.15	0.30-0.61	0.025	0.025	0.50 max	0.80–1.25	0.44-0.65	/
P15	K11578	0.05-0.15	0.30-0.60	0.025	0.025	1.15-1.65	/	0.44-0.65	/
P21	K31545	0.05-0.15	0.30-0.60	0.025	0.025	0.50 max	2.65–3.35	0.80-1.06	/
P22	K21590	0.05-0.15	0.30-0.60	0.025	0.025	0.50 max	1.90-2.60	0.87-1.13	/
P23	K40712	0.04-0.10	0.10-0.60	0.030 max	0.010 max	0.50 max	1.90-2.60	0.05-0.30	V 0.20–0.30 Nb^F 0.02–0.08 B 0.0010–0.006 N 0.015 max Al 0.030 max W 1.45–1.75 Ni 0.40 max Ti 0.005–0.060 Ti/N ≥ 3.5^C
P24	K30736	0.05-0.10	0.30-0.70	0.02	0.01	0.15-0.45	2.20-2.60	0.90-1.10	V 0.20–0.30 Ti 0.06–0.10 N 0.012 max Al 0.02 max B 0.0015–0.007
P36	K21001	0.10-0.17	0.80-1.20	0.030 max	0.025 max	0.25-0.50	0.30 max	0.25-0.50	Ni 1.00-1.30 Cu 0.50-0.80 Nb^F 0.015-0.045 V 0.02 max N 0.02 max Al 0.050 max
P91 Type 1	K91560	0.08-0.12	0.30-0.60	0.02	0.01	0.20-0.50	8.00-9.50	0.85-1.05	V 0.18–0.25 N 0.030–0.070 Ni 0.40 max Al 0.02 max Nb^F0.06–0.10 Ti 0.01 max Zr 0.01 max
P91 Type 2 Heat Product	K91560	0.08-0.12 0.07-0.13	0.30–0.50^D	0.020^D	0.005^D	0.20-0.40^D	8.00-9.50^D	0.85-1.05 0.80-1.05	Heat 0.18–0.25 Product 0.16–0.27 Ni 0.20 max^D Al 0.020 max^D N 0.035–0.070^D N/Al ratio ≥4.0 Nb^F Heat 0.06–0.10 Product 0.05–0.11 Ti 0.01 max^D Zr 0.01 max^D Sn 0.010 max^D Sb 0.003 max^D As 0.010 max^D B 0.001 max^D W 0.05 max^D Cu 0.10 max^D
P92	K92460	0.07-0.13	0.30–0.60	0.02	0.01	0.50 max	8.50-9.50	0.30-0.60	V 0.15–0.25 N 0.03–0.07 Ni 0.40 max Al 0.02 max Nb^F 0.04–0.09 W 1.5–2.00 B 0.001–0.006 Ti 0.01 max Zr 0.01 max
P93	K91350	0.05-0.10	0.50-0.70	0.02	0.008	0.05-0.50	8.50-9.50	/	V 0.15–0.30 W 2.5–3.5 Co 2.5–3.5 Ni 0.20 max Nb^F+ Ta 0.05–0.12 Nd 0.010–0.060 B 0.007–0.015 Al 0.030 max N 0.005–0.015 O 0.0050 max
P115 Heat	K91060	0.08-0.13	0.20-0.50	0.02	0.005	0.15-0.45	10.0-11.0	0.40-0.60	V 0.18–0.25 N 0.030–0.070 Ni 0.25 max Al 0.02 max Nb 0.02–0.06 W 0.05 max B 0.001 max Ti 0.01 max Zr 0.01 max Cu 0.10 max As 0.010 max Sn 0.010 max Sb 0.003 max N/Al ratio min 4.0 CNB^E , max 10.5
Product	/	0.07-0.14	0.50-0.50	0.02	0.005	0.15-0.45	10.0-11.0	0.37-0.63	V 0.16–0.27 N 0.030–0.070 Ni 0.25 max Al 0.02 max Nb 0.02–0.07 W 0.05 max B 0.001 max Ti 0.01 max Zr 0.01 max Cu 0.10 max As 0.010 max Sn 0.010 max Sb 0.003 max
P122	K92930	0.07-0.14	0.70 max	0.02	0.01	0.50 max	10.00-11.50	0.25-0.60	V 0.15–0.30 W 1.50–2.50 Cu 0.30–1.70 Nb^F0.04–0.10 B 0.0005–0.005 N 0.040–0.100 Ni 0.50 max Al 0.020 max Ti 0.01 max Zr 0.01 max
P128	K91421	0.12-0.17	0.30-0.80	0.02	0.01	0.20-0.60	10.50-12.00	0.20-0.60	V 0.15 – 0.30 Ni 0.10 – 0.40 B 0.008 – 0.015 N 0.002 – 0.020 Co 1.50 – 2.20 Al 0.02 max Cu 0.15 max W 1.50 – 2.20 Nb 0.02 – 0.06
P911	K91061	0.09-0.13	0.30-0.60	0.020 max	0.010 max	0.10-0.50	8.5-9.5	0.90-1.10	V 0.18–0.25 Ni 0.40 max Nb^F 0.060–0.10 B 0.0003–0.006 N 0.04–0.09 Al 0.02 max W 0.90–1.10 Ti 0.01 max Zr 0.01 max
P921	K91201	0.08-0.12	0.5-0.7	0.03	0.02	1.6-2.2	8.0-9.5	0.8-1.1	Ni 0.8–1.4 N 0.02–0.05 Al 0.04 max Cu 0.8–1.4

^ANew designation established in accordance with Practice E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).

^BGrade P5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a niobium content of 8 to 10 times the carbon content.

Heat Treatment Requirements^A

Grade	Heat Treat Type	Normalizing Temperature, min or range °F [°C]	Cooling Media	Subcritical Annealing or Tempering Temperature, min or range °F [°C]
P1	full or isothermal anneal or	/	/	/
	normalize and temper or	/	/	1200 [650]
	subcritical anneal	/	/	1200–1300 [650–705]
P2	full or isothermal anneal or	/	/	/
	normalize and temper or	/	/	1200 [650]
	subcritical anneal	/	/	1200–1300 [650–705]
P5	full or isothermal anneal or	/	/	/
P5	normalize and temper or	/	/	1250 [675]
P5b	full or isothermal anneal or	/	/	/
P5b	normalize and temper or	/	/	1250 [675]
P5c	subcritical annea	/	/	1325–1375 [715–745]
P9	full or isothermal anneal or	/	/	/
P9	normalize and temper	/	/	1250 [675]
P11	full or isothermal anneal or	/	/	/
P11	normalize and temper	/	/	1250 [650]
P12	full or isothermal anneal or	/	/	/
	normalize and temper or	/	/	1200 [650]
	subcritical anneal	/	/	1200–1300 [650–705]
P15	full or isothermal anneal or	/	/	/
P15	normalize and temper	/	/	1200 [650]
P21	full or isothermal anneal or	/	/	/
P21	normalize and temper	/	/	1250 [675]
P23	normalize and temper	1900–1975 [1040–1080]	air or accelerated cooling	1350–1470 [730–800]
P24	normalize and temper	1800–1870 [980–1020]	air or accelerated cooling	1350–1420 [730–770]
P36	normalize and temper^B	1650 [900]	/	1100 [595]
P91 Type 1 and Type 2	normalize and temper or	1900–1975 [1040–1080]	/	1350–1470 [730–800]^C
P91 Type 1 and Type 2	quench and temper	1900–1975 [1040–1080]	/	1350–1470 [730–800]
P92	normalize and temper	1900–1975 [1040–1080]	^D	1350–1470 [730–800]
P93	normalize and temper	1960–2140 [1070–1170]	/	1380–1455 [750–790]
P115	normalize and temper	1920–2010 [1050–1100]	^D	1380–1455 [750–790]
P122	normalize and temper	1900–1975 [1040–1080]	/	1350–1470 [730–800]
P128	normalize and temper	1975–2140 [1080–1170]	air	1400–1470 [760–800]
P911	normalize and temper	1900–1975 [1040–1080]	^D	1365–1435 [740–780]
P921	normalize and temper	1670–1740 [910–950]	air	1350–1420 [730–770]

^AWhere ellipses ({) appear in this table there is no requirement.

^BAlternatively, Grade P36, Class 2 shall be cooled from the austenitizing temperature by accelerated cooling in air or by liquid quenching.

^CExcept when Supplementary Requirement S7 is specified by the purchaser.

^DAccelerated cooling from the normalizing temperature shall be permitted for section thicknesses greater than 3 in. [75 mm].

Tensile Requirements

Grade
	P1,P2	P12	P23	P24	P91 Type 1 and Type 2	P92,P93,P911,P36 Class1	P921	P115	P122	P128	P36 Class2	All Others
Tensile strength,min:
ksi	55	60	74	85	85	90	109	90	90	94	95.5	60
Mpa	380	415	510	585	585	620	750	620	620	650	660	415
Yield strength,min:
ksi	30	32	58	60	60	64	84	65	58	71	66.5	30
Mpa	205	220	400	415	415	440	580	450	400	490	460	205

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A335 & A335M ALLOY-STEEL PIPE

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