ASTM A270 Seamless Austenitic and Ferritic and Austenitic Stainless Steel Sanitary Tubing

Product Detail

Scope

1.1 This speci?cation covers grades of seamless, welded, and heavily cold worked welded austenitic and ferritic/austenitic stainless steel sanitary tubing intended for use in the

dairy and food industry and having special surface ?nishes. Pharmaceutical quality may be requested, as a supplementary requirement.

1.2 This speci?cation covers tubes in sizes up to and including 12 in. (304.8 mm) in outside diameter.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical

conversions to SI units that are provided for information only and are not considered standard.

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

2. Referenced Documents

2.1 ASTM Standards:2

A 262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

A 480/A 480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

A 923 Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels

A 967 Specification for Chemical Passivation Treatments for Stainless Steel Parts

A 1016/A 1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes

E 527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

2.2 ASME Standard:

B46.1 Surface Texture (Surface Roughness, Waviness, and Lay)3

2.3 ASME Boiler and Pressure Vessel Code: Section VIII Pressure Vessels3

2.4 Other Standard: SAE J1086 Practice for Numbering Metals and Alloys(UNS)4

3. Terminology

3.1 Definition:

3.1.1 roughness average, Ra, n—arithmetic average surface roughness normally reported in microinches or microns; a

measurement of surface roughness usually performed by moving a stylus in a straight line along the surface, although other methods may be used.




TABLE 1 Chemical Requirements

Element

Grade

TP 304

TP 304L

…

TP 316

TP 316L

…

…

…

…

…

2003

UNS

S30400

S30403

S31254

S31600

S31603

N08926

N08367

S31803

S32205

S32750

S32003

Composition, %

Carbon, max

0.080

0.035B

0.020

0.080

0.035B

0.020

0.030

0.030

0.030

0.030

0.030 max

Manganese,max

2.00

2.00

1.00

2.00

2.00

2.00

2.00

2.00

2.00

1.20

2.00 max

Phosphorus,max

0.045

0.045

0.03

0.045

0.045

0.03

0.04

0.03

0.03

0.035

0.03

Sulfur, max

0.03

0.03

0.01

0.03

0.03

0.01

0.03

0.02

0.02

0.02

0.020 max

Silicon, max

1.00

1.00

0.80

1.00

1.00

0.50

1.00

1.00

1.00

0.80

1.00 max

Nickel

8.0–11.0

8.0–12.0

17.5–18.5

10.0–14.0

10.0–14.0

24.0–26.0

23.5–25.5

4.5–6.5

4.5–6.5

6.0–8.0

3.0–4.0

Chromium

18.0–20.0

18.0–20.0

19.5–20.5

16.0–18.0

16.0–18.0

19.0–21.0

20.0–22.0

21.0–23.0

22.0–23.0

24.0–26.0

19.5–22.5

Molybdenum

…

…

6.0–6.5

2.00–3.00

2.00–3.00

6.0–7.0

6.0–7.0

2.5–3.5

3.0–3.5

3.0–5.0

1.5–2.0

Nitrogen C

…

…

0.18–0.22

…

…

0.15–0.25

0.18–0.25

0.08–0.20

0.14–0.20

0.24–0.32

0.14–0.20

Copper

…

…

0.50–1.00

…

…

0.50–1.5

0.75 max

…

…

0.50 max

…

A New designation established in accordance with Practice E 527 and SAE J 1086.

B For small diameter or thin walls or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in grades TP304L and TP316L. Small outside diameter tubes are defined as those less than 0.500 in. (12.7 mm) in outside diameter and light wall tubes as those less than 0.049 in. (1.24 mm) in average wall thickness (0.044 in. (1.12 mm) in minimum wall thickness).

C The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.




TABLE 2 Permissible Variations in Dimensions
Size,Outside,Diameter,in. (mm)	Permissible Variations in Outside Diameter, in. (mm)		Permissible Variations in Cut Length, in. (mm)A
	Over	Under	Over	Under
1.000 (25.4) and under	0.005 (0.13	0.005 (0.13	1/8 (3.2)	0
Over 1 (25.4) to 2 (50.8)	0.008 (0.20)	0.008 (0.20)	1/8 (3.2)	0
Over 2 (50.8) to 3 (76.2)	0.010 (0.25)	0.010 (0.25)	1/8 (3.2)	0
Over 3 (76.2) to 4 (101.6)	0.015 (0.38)	0.015 (0.38)	1/8 (3.2)	0
Over 4 (101.6) to 5 1/2 (139.7), excl	0.015 (0.38)	0.015 (0.38)	3/16 (4.8)	0
5 1/2 (139.7) to 8 (203.2), excl	0.030 (0.76)	0.030 (0.76)	3/16 (4.8)	0
8 (203.2) to 12 (304.8)	0.050 (1.27)	0.050 (1.27)	3/16 (4.8)	0




A The cut tolerances do not apply to Pharmaceutical Tubing in S2 (see paragraph S2.7).

TABLE S2.1 Tensile and Hardness Requirements

Grade	UNS Designation	Tensile Strength min, ksi (MPa)	Yield Strength min, ksi (MPa)	Elongation in 2 in. min, %	Rockwell Hardness Number, max.
TP304	S30400	75 (515)	30 (205)	35	B90
TP304L	S30403	70 (485)	25 (170)	35	B90
TP316	S31600	75 (515)	30 (205)	35	B90
TP316L	S31603	70 (485)	25 (170)	35	B90
	S31803	90 (620)	65 (450)	25	C30.5
2205	S32205	95 (655)	70 (485)	25	C30.5
2507	S32750	116 (800)	80 (550)	15	C32
2003	S32003	90 (620)	65 (450)	25	C32




ASTM A249/A269/A270, JIS G3447/G3463, CNS 6668/7383
Standard/Item	Outside Diameter					Thickness		Length
ASTM A249		O.D .<< p="">	25mm	+0.10mm	, -0.11mm	±10%		O.D. < 50.8mm +3.0mm
	25mm ?	O.D. ?	40mm	± 0.15mm				-0mm
	40mm << p="">	O.D. << p="">	50mm	±0.20mm				O.D. ? 50.8mm +5.0mm
	50mm ?	O.D. << p="">	65mm	±0.25mm				-0mm
	65mm ?	O.D. << p="">	75mm	±0.30mm
	75mm ?	O.D. ?	100mm	±0.38mm
	100mm << p="">	O.D. ?	200mm	+0.38mm	, -0.64mm
	200mm << p="">	O.D. ?	225mm	+0.38mm	, -1.14mm
ASTM A269		O.D. << p="">	38.1mm	±0.13mm		O.D. < 12.7mm ±15%		O.D. < 38.1mm +3.2mm
	38.1mm ?	O.D. << p="">	88.9mm	±0.25mm		O.D. ? 12.7mm ±10%		-0mm
	88.9mm ?	O.D. << p="">	139.7mm	±0.38mm				O.D. ? 38.1mm +4.8mm
	139.7mm ?	O.D. << p="">	203.2mm	±0.76mm				-0mm
ASTM A270		O.D. ?	25mm	±0.13mm		±12.5%		O.D. ? 100mm +3mm
	25mm << p="">	O.D. ?	50mm	±0.20mm				-0mm
	50mm << p="">	O.D. ?	75mm	±0.25mm				O.D. > 100mm +5mm
	75mm << p="">	O.D. << p="">	140mm	±0.38mm				-0mm
CNS 6668		O.D. ?	25.4mm	± 0.15mm		±10%		+10mm
JIS G3447	25.4mm << p="">	O.D. ?	31.8mm	± 0.16mm				-0mm
	31.8mm << p="">	O.D. ?	38.1mm	± 0.19mm
	38.1mm << p="">	O.D. ?	76.3mm	± 0.25mm
	76.3mm << p="">	O.D. ?	89.1mm	± 0.30mm	, -0.40mm
	89.1mm << p="">	O.D. ?	101.6mm	± 0.35mm	, -0.40mm
	101.6mm << p="">	O.D. ?	114.3mm	± 0.40mm	, -0.60mm
	114.3mm << p="">	O.D. ?	139.8mm	± 0.40mm	, -0.80mm
	139.8mm << p="">	O.D. ?	165.2mm	± 0.40mm	, -1.20mm
JIS G3463		O.D. << p="">	60mm	±0.25mm		O.D. < 40mm	t < 2mm +0.4mm	O.D. ? 50mm + 7mm
	60mm ?	O.D. << p="">	80mm	±0.30mm			-0.0mm	- 0mm
	80mm ?	O.D. << p="">	100mm	±0.40mm			t ? 2mm +20%	O.D. > 50mm +10mm
	100mm ?	O.D. << p="">	120mm	+0.40mm	, -0.60mm		-0mm	-0mm
	120mm ?	O.D. << p="">	160mm	+0.40mm	, -0.80mm	O.D.? 40mm	22%
	160mm ?	O.D. << p="">	200mm	+0.40mm	, -1.20mm		-0mm
	200mm ?	O.D.		+0.40mm	, -1.60mm










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