ASTM A554 / ASME SA554 / Welded Stainless Steel Mechanical Tubing supplier & distributor in India

ASTM A 554-88a / ASME SA 554

WELDED STAINLESS STEEL MECHANICAL TUBING

1. Scope

1.1 This specification covers welded stainless steel tubing for mechanical applications where appearance, mechanical properties, or corrosion resistance is needed. The grades covered are listed in table.

1.2 This specification covers as-welded or cold-reduced mechanical tubing in sizes to 16 in. (406.4mm) outside diameter, inclusive(for round tubing)and in wall thicknesses 0.020in.(0.51mm)and over.

1.3 Tubes shall be furnished in one of the following shapes as specified by the purchaser: round, square, rectangular, or special.

1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.

1.5 The values stated in inch-pound units are to be regarded as the standard.

Table 1 Chemical Requirements

Grade	Composition, %
Grade	Carbon, max	Manganese, max	Phos- phorus, max	Surfur, max	Silicon, max	Nickel	Chromium	Molybdenum	Titanium	Columbium +Tantalum
Austenitic
MT-301	0.15	2.00	0.040	0.030	1.00	6.0-8.0	16.0-18.0	...	...	...
MT-302	0.15	2.00	0.040	0.030	1.00	8.0-10.0	17.0-19.0	...	...	...
MT-304	0.08	2.00	0.040	0.030	1.00	8.0-11.0	18.0-20.0	...	...	...
MT-304L	0.035A	2.00	0.040	0.030	1.00	8.0-13.0	18.0-20.0	...	...	...
MT-305	0.12	2.00	0.040	0.030	1.00	10.0-13.0	17.0-19.0	...	...	...
MT-309S	0.08	2.00	0.040	0.030	1.00	12.0-15.0	22.0-24.0	...	...	...
MT-309S-Cb	0.08	2.00	0.040	0.030	1.00	12.0-15.0	22.0-24.0	...	...	C
MT-310S	0.08	2.00	0.040	0.030	1.00	19.0-22.0	24.0-26.0	...	...	...
MT-316	0.08	2.00	0.040	0.030	1.00	10.0-14.0	16.0-18.0	2.0-3.0	...	...
MT-316L	0.035A	2.00	0.040	0.030	1.00	10.0-15.0	16.0-18.0	2.0-3.0	...	...
MT-317	0.08	2.00	0.040	0.030	1.00	11.0-14.0	18.0-20.0	3.0-4.0	...	...
MT-321	0.08	2.00	0.040	0.030	1.00	9.0-13.0	17.0-20.0	...	B	...
MT-330	0.15	2.00	0.040	0.030	1.00	33.0-36.0	14.0-16.0	...	...	...
MT-347	0.08	2.00	0.040	0.030	1.00	9.0-13.0	117.0-20.0	...	...	C
Ferritic
MT-429	0.12	1.00	0.040	0.030	1.00	0.50 max	14.0-16.0	...	...	...
MT-430	0.12	1.00	0.040	0.030	1.00	0.50 max	16.0-18.0	...	...	...
MT-430-Ti	0.10	1.00	0.040	0.030	1.00	0.075 max	16.0-19.5	...	5 x C min.	...
									0.75 max

Table 2 Diameter, Wall,A and Ovality Toerances

(All Conditions Except Tubing with Bead Removed)

NOTE 1 - Ovality is the difference between maximum and minimum outside diameters measured at any one cross section. There is no additional tolerance for ovality on tubes having a nominal wall thickness of more than 3% of the outside diameter.

NOTE 2 - For sizes up to and including 5-in. (127.0-mm) outside diameter, an ovality tolerance of twice the tabular outside diameter tolerance spread shown is applied diamter readings should fall within the outside diameter tolerances as shown in this table.

NOTE 3 - For sizes over 5-in. (127.0mm) to and including 16-in. (406.4-mm) outside diameter, when the specified wall thickness is 3% or less of the outside diameter, the ovality shall not exceed 1.5% of the specified outside diameter.

OD Size, in.(mm)	Wall Thickness		OD, ±
OD Size, in.(mm)	in.	mm	in.	mm
Under 1/2 (12.7)	0.020 to 0.049	0.51 to 1.24	0.004	0.10
1/2 to 1 (12.7 to 25.4)	0.020 to 0.065	0.51 to 1.65	0.005	0.13
1/2 to 1(12.7 to 25.4)	over 0.065 to 0.134	over 1.65 to 3.40	0.010	0.25
Over 1 to 1/2 (25.4 to 38.1), incl	0.025 to 0.065	0.64 to 1.65	0.008	0.20
Over 1 to 1/2 (25.4 to 38.1), incl	over 0.065 to 0.134	over 1.65 to 3.40	0.010	0.25
Over 1 to 2 (25.4 to 38.1), incl	0.025 to 0.049	0.64 to 1.65	0.010	0.25
Over 1 to 2 (25.4 to 38.1), incl	over 0.049 to 0.083	over 1.65 to 3.40	0.011	0.28
Over 1 to 2 (25.4 to 38.1), incl	over 0.083 to 0.149	0.64 vo 1.24	0.012	0.30
Over 2 to 2 1/2 (25.4 to 38.1), incl	0.032 to 0.065	over 1.24 to 2.11	0.012	0.30
Over 2 to 2 1/2 (25.4 to 38.1), incl	over 0.065 to 0.109	over 2.11 to 3.78	0.013	0.33
Over 2 to 2 1/2 (25.4 to 38.1), incl	over 1.109 to 0.165	0.81 to 1.65	0.014	0.36
Over 2 to 3 1/2 (25.4 to 38.1), incl	0.032 to 0.165	over 1.65 to 2.77	0.014	0.36
Over 2 to 3 1/2 (25.4 to 38.1), incl	over 0.165	over 2.77 to 4.19	0.020	0.51
Over 3 to 5 1/2 (25.4 to 38.1), incl	0.035 to 0.165	0.81 to 4.19	0.020	0.51
Over 3 to 5 1/2 (25.4 to 38.1), incl	over 0.165	over 4.19	0.025	0.34
Over 5 to 16 1/2 (25.4 to 38.1), incl	all	all	0.00125 in./in. or mm/mm of circumference

AWall tolerance ±10% of nominal wall thickness.

TABLE 3 Diameter, Wall,A and Ovality Tolerances for Tubing with Bead Removed

NOTE 1 - Ovality is the difference between maximum and minimum outside diameters measured at any one cross section. There is no addifional tolerance for ovality on tubes having a nominal wall thickness of more than 3% of the outside diameter.

NOTE 2 - An ovality allowance of twice the outside diameter tolerance, shown in this table, is applied one half plus and one haif minus to the outside diameter, for tubes having a nominal wall thickness of 3% or less of the outside diameter. The average of the maximum and minimum outside diameter readings should fall within the outside diameter tolerances of this table.

NOTE 3 - Tubing may be specified to only two of the three following dimensions-outside diameter, inside diameter, or wall.

OD Size, in.(mm)	OD, ±		ID, ±
OD Size, in.(mm)	in.	mm	in.	mm
Up to 3/32 (2.4), excl	0.001	0.03	0.001	0.03
3/32 to 3/16(2.4 to 4.8), excl	0.0015	0.038	0.0015	0.038
3/16 to 1/2 (4.8 to 12.7), excl	0.003	0.08	0.005	0.13
1/2 to 1 (12.7 to 25.4), excl	0.004	0.10	0.006	0.15
1 to 1 1/2 (25.4 to 38.1), excl	0.005	0.13	0.007	0.18
1 1/2 to 2 (38.1 to 50.8), excl	0.006	0.15	0.008	0.20
2 to 2 1/2 (50.8 to 63.5), excl	0.007	0.18	0.010	0.25
2 1/2 to 3 1/2 (63.5 to 88.9), excl	0.010	0.25	0.014	0.36
3 1/2 to 5 (88.9 to 127.0), incl	0.015	0.38	0.020	0.51
Over 5 to 6 (127.0 to 406.4), incl	0.00125 in./in. or mm/mm of circumference		0.0013 in./in. or mm/mm of circumference

AWall tolerance is ±10% ofnominal wall thickness.

TABLE 4 Length Variations - Cut Length Tubes

Length, ft (m)	Outside Diameter, in.(mm)	Permissible Variations in Length, in.
		OverA		Under
		in.	mm	Under
4 (1.2) and under	up to 2(50.8), incl	1/16	1.6	0
	over 2 to 4(50.8 to 101.6), incl	3/32	2.4	0
	over 4(101.6)	1/8	3.2	0
Over4 to 10 (1.2 to 3.0), incl	up to 2(50.8), incl	3/32	2.4	0
	over 2(50.8)	1/8	3.2	0
Over 10 to 24 (3.0 to 7.3), incl	all sizes	3/15	4.8	0

AFor all diameters in lengths over 24 ft (7.3m), an additional over tolerance of 1.8 in. (3.2 mm) for each 10 ft (3.0m)
or fraction thereof shall be permissible, up to a toleranceof 1/2 in. (12.7mm), max. determined from a product
analysis made by the tubular product manufacturer, shall conform to requirements specified.
When requested in the order or contract, a report of this analysis shall be furnished to the purchaser.

TABLE 5 Square and Rectangular Tubing

Outside Dimension Tolerances
Largest Nominal Outside Dimension Across Flats, in.(mm)	Wall Thickness,A in. (mm)	±,in.(mm), across Flats, Convexity or Conscavity, incl
To 1 1/4(31.8), incl	all	0.015(0.38)
Over 1 1/4 to 2 1/2 (31.8 to 63.8), incl	all	0.020(0.51)
Over 2 1/2 to 5 1/2 (63.5 to 139.7), incl	all	0.030(0.76)
Maximum Radii of Comers
Wall Thickness, in.(mm)		Radii of Comers, max, in.(mm)
Over 0.020 to 0.049 (0.51 to 1.24), incl		3/32 (2.4)
Over 0.020 to 0.049 (0.51 to 1.24), incl		1/8 (3.2)
Over 0.020 to 0.049 (0.51 to 1.24), incl		9/64 (3.6)
Over 0.020 to 0.049 (0.51 to 1.24), incl		3/16(4.8)
Over 0.020 to 0.049 (0.51 to 1.24), incl		13/34(5.2)
Over 0.020 to 0.049 (0.51 to 1.24), incl		7/32(5.6)
Over 0.020 to 0.049 (0.51 to 1.24), incl		1/4(6.4)
Twist Tolerances
Largest Size, in. (mm)		Twist in 3 ft, max, in. (mm/m)
Under 1/2(12.7)		0.050(1.4)
1/2 to 1 1/2(12.7 to 38.1), incl		0.075(2.1)
Over 1 1/2 to 2 1/2(38.1 to 63.5), incl		0.095(2.6)
Over 2 1/2 (63.5)		0.125(3.5)
Squareness of Sides
±B = C x 0.006 where : B = tolerance for out-of-square, and C = length of longest side.
The straightness tolerance is 0.075 in. in 3 ft or 2.1 mm in 1 m using a 3-ft (1-m) straightedge and feeler gage.

zAWall tolerance is ±10% of nominal wall thickness.

TABLE 7 Tensile Requirements (Round Annealed Condition)

Grade	Tensile Strength, min		Yield Strength, min		Elongationa IN 2 IN. OR 50MM, MIN, %
Grade	ksi	MPa	ksi	MPa	Elongationa IN 2 IN. OR 50MM, MIN, %
MT 429 and MT 430	60	414	35	241	20
MT-430-Ti	60	414	30	207	20
MT 304 L & 8 MT 316 L	70	483	25	172	35
All other austenitic steels	75	517	30	207	35

AFor longitudinal strip tests, the width of the gage section shall be 1 in. (25.4mm) and a deduction of 1.75 percentage
points for austeniticc grades and 1.0 percentage points for MT 429 and MT 430 shall be permitted from the basic
minimum elongation for each 1/32-in. (0.79-mm) decrease in wall thickness below 5/16 in. (7.94mm).

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