ASTM A269 Stainless Steel Tube

ASTM A269 Stainless Steel Tube specification covers nominal-wall-thickness, seamless and welded austenitic steel tubing for general corrosion-resisting and low- or high-temperature service. All ASTM A269 material shall be furnished in the heat-treated condition. The steel shall conform to the chemical composition requirements. Different mechanical test requirements that includes, flaring test, flange test, hardness test, and reverse flattening test are presented.

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ASTM A269 Seamless Stainless Steel Tubing is used for low temperature and high temperature services. These pipes could be made from austenitic steel types under electric resistant weld, electric fusion weld or seamless cold drawing mechanisms. The SA269 Tubing can also have different finishes and can be heat treated.

Stainless steel pipes under ASTM A269 are mainly made of austenitic stainless steel, such as 304, 316, etc.The SA 269 Tp 316 is more corrosion resistant than the 304 material types and it is used in applications with high pressures and high temperatures as well as low pressure and low temperatures. Therefore the SA 269 Tp 304 and the ASTM A269 Tp316 material grade pipes have different schedules. These schedules correspond to different wall thickness corresponding to different nominal diameters.

What is ASTM A269 tubing?

A269 specification for seamless and welded Austenitic stainless steel tubing for general service. This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service.

ASTM A269 tubing has excellent corrosion resistance and can remain stable in a variety of corrosive environments. In industries such as chemical, food processing, and pharmaceuticals, steel pipes need to be exposed to various corrosive media. ASTM A269 tube can be used for a long time without being damaged by corrosion due to their good corrosion resistance, ensuring the sealing and safety of the pipeline system and reducing maintenance and replacement costs.

ASTM A269 Stainless Steel Tube Specifications

Specification	ASTM A269
Grades	304, 304L, 304H, 304LN, 309S, 310S, 316, 316L, 316H, 316Ti, 316LN, 317L, 321, 321H, 347, 347H, 904L, SMO 254, ALLOY 254, 6MO, 6MOLY, UNS S31254 etc.
Type	SEAMLESS / WELDED / ERW / EFW / COLD DRAW / HOT FINISH / COLD FINISH
Ends	Plain Ends / Beveled Ends
Delivery Conditions	As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw
Coating	Electropolish, Mechanical Polish, Satin Finish, Passivated
Other Testing	Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiographic Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc
Value Added Services	Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment
Packaging	Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector

ASTM A269 Standard Scope

This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service, as designated in Table 1.

The tubing sizes and thicknesses usually furnished to this specification are 1/4 in. [6.4 mm] in inside diameter and larger and 0.020 in. [0.51 mm] in nominal wall-thickness and heavier.

Mechanical property requirements do not apply to tubing smaller than 1/8 in. [3.2 mm] in inside diameter or 0.015 in. [0.38 mm] in thickness.

Note 1: Additional testing requirements may apply for use in ASME B31.3 applications.

Optional supplementary requirements are provided and, when one or more of these are desired, each shall be so stated in the order.

The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Chemical Composition of A 269 Seamless Steel Tubes

Grade	UNS	Composition, %
	Design	C	Mn	P	S	Si	Cr	Ni	Mo	Ti	Nb	N	Cu	Al
TP304	S30400	0.08	2	0.045	0.03	1	18.0–20	8.0–11	. . .	. . .	. . .	. . .	. . .
TP304L	S30403	0.035	2	0.045	0.03	1	18.0–20	8.0–13	. . .	. . .	. . .	. . .	. . .
TP304LN	S30453	0.035	2	0.045	0.03	1	18.0–20	8.0–11	. . .	. . .	. . .	0.10-0.16	. . .
TP316	S31600	0.08	2	0.045	0.03	1	16.0–18	10.0–14	2.00–3	. . .	. . .	. . .	. . .
TP316L	S31603	0.035	2	0.045	0.03	1	16.0–18	10.0–15	2.00–3	. . .	. . .	. . .	. . .
TP316LN	S31653	0.035	2	0.045	0.03	1	16.0–18	10.0–13	. . .	. . .	. . .	0.10-0.16	. . .
TP317	S31700	0.08	2	0.045	0.03	1	18.0–20	11.0–15	3.0–4	. . .	. . .	. . .	. . .
TP321	S32100	0.08	2	0.045	0.03	1	17.0–19	9.0–12	. . .	. . .	. . .	. . .	. . .
TP347	S34700	0.08	2	0.045	0.03	1	17.0–19	9.0–13	. . .	. . .	. . .	. . .	. . .
TP348	S34800	0.08	2	0.045	0.03	1	17.0–19	9.0–12.0	. . .	0.1	. . .	. . .	. . .	C:
														0.2
														max
. . .	S31254	0.02	2	0.045	0.035	1	19.5–20.5	17.5-18.5	6.0-6.5	. . .	. . .	0.18-0.22	0.50-1.50	. . .

ASME A269 Tubes Mechanical Properties

Material	Heat treatment	Temperure F (C) Min.	Hardness
			Brinell	Rockwell
TP304	Solution	1900 (1040)	192HBW/200HV	90HRB
TP304L	Solution	1900 (1040)	192HBW/200HV	90HRB
TP316	Solution	1900(1040)	192HBW/200HV	90HRB
TP316L	Solution	1900(1040)	192HBW/200HV	90HRB
TP321	Solution	1900(1040) F	192HBW/200HV	90HRB
TP347	Solution	1900(1040)	192HBW/200HV	90HRB

What material is equivalent to ASTM A269?

EN-standard Steel no. k.h.s DIN	EN-standard Steel name	SAE grade	UNS
1.4109	X65CrMo14	440A	S44002
1.4112	X90CrMoV18	440B	S44003
1.4125	X105CrMo17	440C	S44004
		440F	S44020
1.4016	X6Cr17	430	S43000
1.4408	G-X 6 CrNiMo 18-10	316	S31600
1.4512	X6CrTi12	409	S40900
		410	S41000
1.431	X10CrNi18-8	301	S30100
1.4318	X2CrNiN18-7	301LN
1.4307	X2CrNi18-9	304L	S3043
1.4306	X2CrNi19-11	304L	S30403
1.4311	X2CrNiN18-10	304LN	S30453
1.4301	X5CrNi18-10	304	S30400
1.4948	X6CrNi18-11	304H	S30409
1.4303	X5CrNi18-12	305	S30500
	X5CrNi30-9	312
1.4841	X22CrNi2520	310	S31000
1.4845	X 5 CrNi 2520	310S	S31008
1.4541	X6CrNiTi18-10	321	S32100
1.4878	X12CrNiTi18-9	321H	S32109
1.4404	X2CrNiMo17-12-2	316L	S31603
1.4401	X5CrNiMo17-12-2	316	S31600
1.4406	X2CrNiMoN17-12-2	316LN	S31653
1.4432	X2CrNiMo17-12-3	316L	S31603
1.4435	X2CrNiMo18-14-3	316L	S31603
1.4436	X3CrNiMo17-13-3	316	S31600
1.4571	X6CrNiMoTi17-12-2	316Ti	S31635
1.4429	X2CrNiMoN17-13-3	316LN	S31653
1.4438	X2CrNiMo18-15-4	317L	S31703
1.4362	X2CrNi23-4	2304	S32304
1.4462	X2CrNiMoN22-5-3	2205	S31803/S32205
1.4501	X2CrNiMoCuWN25-7-4	J405	S32760
1.4539	X1NiCrMoCu25-20-5	904L	N08904
1.4529	X1NiCrMoCuN25-20-7		N08926
1.4547	X1CrNiMoCuN20-18-7	254SMO	S31254

Permissible Variations in Dimensions

OD, inch	OD Tolerance inch(mm)	WT Tolerance %	Length Tolernace inch(mm)
			+	-
≤1 /2	± 0.005 ( 0.13 )	± 15	1 /8 ( 3.2 )	0
> 1 /2~1 1 /2	± 0.005(0.13)	± 10	1 /8(3.2)	0
> 1 1 /2~< 3 1 /2	± 0.010(0.25)	± 10	3 /16(4.8)	0
> 3 1 /2~< 5 1 /2	± 0.015(0.38)	± 10	3 /16(4.8)	0
> 5 1 /2~< 8	± 0.030(0.76)	± 10	3 /16(4.8)	0
8~< 12	± 0.040(1.01)	± 10	3 /16(4.8)	0
12~< 14	± 0.050(1.26)	± 10	3 /16(4.8)	0

Difference between ASTM A249, A269, A270 Stainless steel tubing

Surface Finish

A249 and A269 both require Surfaces “free of scale” – annealing of the tube is normally done in a controlled atmosphere and this “bright annealed” finish is considered acceptable.

A270 requires selection of both internal and external Surfaces. The possible conditions range from a "mill finish" (i.e. the strip's 2B finish, without any subsequent polishing), to abrasive polishing with 80, 120, 180 or 240 grit, to special polishing and electropolishing. Surfaces finishes may also be specified in terms of Ra values, but no limits are given in the specification.

Heat Treatment

A249,A269 and A270 both require that “all material shall be furnished in the heat treated condition”. Heat treatment is annealing (also referred to as solution treatment or solution annealing). In practice this is not a common requirement for food industry tube unless it requires significant bending or flaring.

Which Specification

 ASTM A249 is written for a quite different application area. It does specify weld bead removal, but this requirement can be met from other standards, without unnecessarily calling up the stringent mechanical properties of A249. The annealing mandatory in A249 will also not be required in most food applications. A high cost option.

ASTM A269 again requires tube in the annealed condition. Conversely, it does not specify internal weld bead removal, which generally is a food industry requirement. A269’s main positive aspect is that it is frequently a stock item. It will prove uncompetitive against un-annealed tube.

ASTM A270 also has problems in that it requires the tube in the annealed condition, and says nothing about weld bead. The finish options available in this specification are very comprehensive. Usually request inner polish as well as outer Surfaces.

Dimension Tolerances

Standard	Tolerance of Outside Diameter		Wall thickness（%）	Length Tolerance(mm)
	(mm)
ASTM A249	<25.0	-0.01	± 10%
	≥25.0-≤40.0	± 0.15
	>40.0-<50.0	± 0.20		OD<50.8	3
	≥50.0~<65.0	± 0.25
	≥65.0-<75.0	± 0.30
	≥75.0~<100.0	± 0.38		OD≥50.8	+5.0-0.0
	≥100~≤200.0	-0.26
	>200.0-≤225.0	-0.76
ASTM A269	<38.1	± 0.13
	≥38.1~<88.9	± 0.25
	≥88.9-<139.7	± 0.38	± 15.0%	OD <38.1	3.2
	≥139.7~<203.2	± 0.76	± 10.0%	0D ≥38.1	4
	≥203.2-<304.8	± 1.01
	≥304.8-<355.6	± 1.26
ASTMA270	≤25.4	± 0.13	± 10%	+10-0.0
	>25.4-≤50.8	± 0.20
	>50.8~≤62	± 0.25
	>76.2- ≤101.6	± 0.38
	>101.6~<139.7	± 0.38
	≥139.7–203.2	± 0.76
	≥203 2~≤304.8	± 1.27

ASTM Referenced Standards

A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels.

A370 Test Methods and Definitions for Mechanical Testing of Steel Products.

A480 A480M Specification for general requirements for Flat-rolled stainless and Heat-Resisting steel plate, sheet, and strip.

A632 Specification for Seamless and welded austenitic stainless-steel tubing (small-diameter) for general service.

A1016 A1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless-Steel Tubes.

E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS).

Ordering Information

Orders for material under this specification should include the following, as required, to describe the desired material adequately：

Quantity (feet, metres, or number of lengths),

Name of material (seamless or welded tubes),

Grade (Table 1),

Size (outside diameter and nominal wall thickness),

Length (specific or random),

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

ASTM A269 Stainless Steel Tube Exported Countries

We Export ASTM A269 Stainless Steel Tube to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc