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

TABLE 1 Chemical Requirements

Element

 Grade

 TP 304

 TP 304L

...

TP 316

 TP 316L

...

...

...

...

...

2003

UNS Designation A

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