ASTM A335 Alloy Steel Pipes Chrome Moly Pipes

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ASTM A335 Alloy Steel Pipes Chrome Moly Pipes

We are leading manufacturer and stockiest of ASTM A335 Alloy Steel Pipes in China.

ASTM A335 Alloy Steel Pipes Specifications:

Size: OD: 14-914mm WT: 1-35 mm.

Forging/hot rolling/ extrusion of steel.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement.

UTS according to SEP 1921 C/c,D/d,E/e;A388 or GB/T 6402

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Mechanical Tests Specified of ASTM A335 Alloy Steel Pipes P12

Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test
For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested.
For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe.
Notes for Hardness Test:		P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Notes for Bend Test:		For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test.
		Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.
		The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion.
		The inside diameter of the bend shall be 1 inch [25 mm].
Hydrostatic Test		Each length of pipe shall be Hydro tested, at option of manufacture, nondestructive electric testing can be used.

ASTM A335 Alloy Steel Pipes P22 Specification:

ASTM A335 Alloy Steel Pipes P22 is ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties,and high-temperature characteristics.

Equivalent Standards: EN 10216-2, ASTM A213, ASME SA213, GOST 550-75, NBR 5603

Equivalent Material: T22, 10CrMo910, 10CrMo9-10, 1.7380, 11CrMo9-10, 1.7383

Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.

Heat Treatment

A / N+T

N+T / Q+T

N+T

Chemical Composition:

C, %	Mn, %	P,%	S,%	Si,%	Cr,%	Mo,%
0.05-0.15	0.30-0.60	0.025 max	0.025 max	0.50 max	1.90-2.60	0.87-1.13

Mechanical Properties:

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %
415 min	205 min	30 min

ASTM A335 Alloy Steel Pipes P91 Heat Treatment Requirements

P5, P9, P11, and P22

Grade	Heat Treatment Type	Normalizing Temperature Range F [C]	Subcritical Annealing or Tempering Temperature Range F [C]
P5 (b,c)	Full or Isothermal Anneal
	Normalize and Temper	*****	1250 [675]
	Subcritical Anneal (P5c only)	*****	1325– 1375 [715– 745]
P9	Full or Isothermal Anneal
P9	Normalize and Temper	*****	1250 [675]
P11	Full or Isothermal Anneal
P11	Normalize and Temper	*****	1200 [650]
P22	Full or Isothermal Anneal
P22	Normalize and Temper	*****	1250 [675]
P91	Normalize and Temper	1900-1975 [1040– 1080]	1350-1470 [730– 800]
P91	Quench and Temper	1900-1975 [1040– 1080]	1350-1470 [730– 800]

ASTM A335 Alloy Steel Pipes P91 Chemical Requirements

	Grade	P-5	P-9	P-11	P-22	P-91	P-91 shall also include the following:
Element	UNS Designation	K41545	S50400	K11597	K21590	K91560
Carbon	0.15 max	0.15 max	0.05– 0.15	0.05– 0.15	0.08– 0.12	V at 0.18– 0.25
Manganese	0.30– 0.60	0.30– 0.60	0.30– 0.60	0.30– 0.60	0.30– 0.60	N at 0.030– 0.070
Phosphorous, max	0.025	0.025	0.025	0.025	0.020	Ni at 0.40 max
Sulfur, max	0.025	0.025	0.025	0.025	0.010	Al at 0.02 max
Silicon	0.50 max	0.25– 1.00	0.50– 1.00	0.50 max	0.20 -0.50	Cb at 0.06– 0.10
Chromium	4.00– 6.00	8.00– 10.00	1.00– 1.50	1.90– 2.60	8.00– 9.50	Ti at 0.01 max
Molybdenum	0.45 -0.65	0.90– 1.10	0.44– 0.65	0.87– 1.13	0.85– 1.05	Zr at 0.01 max

ASTM A335 Alloy Steel Pipes P91 Tensile Requirements

Seamless
	P-5	P-9	P-11	P-22	P-91
Tensile Strength, min., psi						P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
ksi	60	60	60	60	85
MPa	415	415	415	415	585
Yield Strength, min., psi
ksi	30	30	30	30	60
MPa	205	205	205	205	415

ASTM A335 Alloy Steel Pipes P91 Permissible Variation in Wall Thickness

NPS [DN] Designator	Tolerance, % from Specified
	Over	Under
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios	20.0%	12.5%
Above 2 1/2 [65], t/D < or = 5%	22.5%	12.5%
Above 2 1/2 [65], t/D > 5%	15.0%	12.5%
(t = Specified Wall Thickness; D = Specified Outside Diameter)

ASTM A335 Alloy Steel Pipes P91 Elongation Requirements

Calculated Minimum Elongation Values
Elongation in 2 in. or 50 mm, min %
Wall Thickness		P5, P9, P11, P22		P91
in.	mm	Longitudinal	Transverse	Longitudinal
5/16 (0.312)	8	30	20	20
9/32 (0.281)	7.2	28	19	19
1/4 (0.250)	6.4	27	18	18
7/32 (0.219)	5.6	26		17
3/16 (0.188)	4.8	24		16
5/32 (0.156)	4	22		15
7/8 (0.125)	3.2	21		14
3/32 (0.094)	2.4	20		13
1/18 (0.062)	1.6	18		12

ASTM A335 Alloy Steel Pipes P91 Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN] Designator	Over		Under
	in.	mm	in.	mm
1/8 to 1 1/2 [6 to 40], incl.	1/64 (0.015)	0.40	1/64 (0.015)	0.40
Over 1 1/2 to 4 [40 to 100], incl.	1/32 (0.031)	0.79	1/32 (0.031)	0.79
Over 4 to 8 [100 to 200], incl.	1/16 (0.062)	1.59	1/32 (0.031)	0.79
Over 8 to 12 [200 to 300], incl.	3/32 (0.093)	2.38	1/32 (0.031)	0.79
Over 12 [300]	+/- 1% of the specified outside diameter

ASTM A 335 STEEL PIPES ALLOY STEEL PIPES P1 with IBR Certified (ASTM A335 / A335M - 11 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service)

This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high temperature service. Pipe ordered to this specification shall be suitable for bending, flanges (vanishing), and similar forming operations, and for fusion welding.

ASTM A 335 STEEL PIPES ALLOY STEEL PIPES P1 Name: ASTM SA335 Alloy Steel Tubes for boilers, superheaters and heat exchangers

ASTM A335 ALLOY STEEL PIPES P2 Specifications

Size Range: 1/2" NB to 36" NB

Thickness Range: SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules

End Connections for Line Pipes: Plain, Bevel, Screwed, Threaded

Type: Seamless / ERW / Welded / Fabricated / CDW

Form: Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes

Length: Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths

Hardness and heat treatment specification of ASTM A335 ALLOY STEEL PIPES P5

Annealing hardness HBS	Cold pull hardness HBS	Preheating temperature ?	Quenching temperature ?		Holding time min	Hardening medium	Temper temperature ?	After tempering hardness =HRC
			salt-bath furnace	controlled atmosphere furnace
235	262	788	1191	1204	5~15	air cooling	522	60

Steel plate/Sheet thickness / mm	sb MPa	ss =/MPa	d Samples from the standard for 50 mm (2 in)	180 ° of cold bending test
				longitudinal	horizontal
Hot-rolled/Cold rolling:5 - 150	520	415	16~18	2a	3.5a
Note: (1) listed in the table apex diameter (d), to steel thickness (a) multiples said. (2) in the ASTM A6 standard specified scope can meet any additional conditions. (3) from the standard for 50 mm (2 in). ASTM A 335 STEEL PIPES ALLOY STEEL PIPES P5 Mechanical properties ASTM A 335 STEEL PIPES ALLOY STEEL PIPES P5 Mechanische Eigenschaften ASTM A 335 STEEL PIPES ALLOY STEEL PIPES P5 Caracteristiques mecaniques ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d'elasticite minimale Rm Tensile strength / Zugfestigkeit / Resistance a la traction A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc