ASTM A139 / ASME SA139 / Electric Resistance Welded Steel Pipe supplier & distributor in India

ASTM A 139-89b / ASME SA 139-89b

ELECTRIC RESISTANCE WELDED STEEL PIPE

1.Scope

1.1 This specification covers five grades of electric -fusion (arc)-welded straight-seam or spiral-seam steel pipe
in NPS 4 to 92 (Note 1) inclusive with nominal (average) wall thick-dimensions (Note 2) may be furnished provided
such pipe complies with all other requirements of this specification.

The grades of steel are pipe mill grades having mechanical properties which differ from standard plate grades,
The pipe is intended for conveying liquid , gas, or vapor.

NOTE 1?The dimensionless designator NPS 9nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."

NOTE 2?A comprehensive listing of standardized pipe dimensions is contained in ANSI B36.10.

NOTE 3?T he suitability of pipe for various purposes is somewhat dependent on its dimensions, properties, and conditions of service. For example, for high-temperature service see applicable codes and Specification A 691.

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

Chemical composition Mechanical Properties

Chemical Composition

The steel shall conform to the chemical requirements prescribed in Table 1 and
the chemical analysis shall be in accordance with Test methods, Practices, and Terminology A 751.

TABLE 1 Chemical Requirements

Element	Composition, max, %
Element	Grade A	Grade B	Grade C	Grade D	Grade E
Carbon	...	0.30	0.30	0.30	0.30
Manganese	1.00	1.00	1.20	1.30	1.40
Phosphorus	0.035	0.035	0.035	0.035	0.035
Sulfur	0.035	0.035	0.035	0.035	0.035

NPS	Number of Samples Selected
Under 14	2 for each lot of 200 pipes or fraction thereof
14 to 36, incl	2 for each lot of 100 pipes or fraction thereof
Over 36	2 for each 3000 ft or fraction thereof

TABLE 2 Tensile Requirements

-	Grade A	Grade B	Grade C	Grade D	Grade E
Tensile strength, min, ksi (MPa) Yield strength, min, ksi (MPa) Elongation in 2 in. or 50 mm, min. % Basic minimum elongation for walls 5/16 in. (7.9 mm) and over in thickness, longitudinal strip tests For longitudinal strips tests, a deduction for each 1/32-in. (7.9 mm) from the basic minimum elongation of the following percentageA Elongation in 8 in. (203.2 mm), in min, % b.c	48 (331)	60 (414)	60 (414)	60 (414)	66 (455)
	30 (207)	35 (241)	42 (290)	46 (317)	52 (359)
	-	-	-	-	-
	35	30	25	23	22
	-	-	-	-	-
	1.75A	1.50A	1.25	1.50	2.0
	1 500 000/tensile strength

AThe table below gives the computed minimum values.

BFor wall thicknesses 1/2 in. (12.7 mm) and greater, the elongation may be taken in 8 in. (203.2 mm).

CThe elongation in 8 in. (203.2 mm) need not exceed 30 %.

Wall Thickness		Elongation 2 in. or 50 mm, min, %
in.	mm	Grade A	Grade B
5/16 (0.312)	7.94	35.00	30.00
9/32 (0.281)	7.14	33.25	28.50
1/4 (0.250)	6.35	31.50	27.00
7/32 (0.219)	5.56	29.75	25.50
3/16 (0.188)	4.76	28.00	24.00
5/32 (0.156)	3.97	26.25	22.50
1/8 (0.125)	3.18	24.50	21.00
3/32 (0.094)	2.38	22.75	19.50
1/16 (0.062)	1.59	21.00	18.00

Note-The above table gives the computed minimum elongation values for each 1/32-in.
(0.79-mm) decrease in wall thickness. Where the wall thickness lies between two values shown above,
the minimum elongation value shall be determined by the following equation:

Grade	Equation
A	E = 56t + 17.50
B	E = 48t + 15.00
C	E = 48t + 12.50
D	E = 48t + 8
E	E = 64t + 2

where: E = elongation in 2 in. (50 mm), %, andt = actual thickness of spectimen, in. Material Comparison Tables (ASTM -> KS, JIS, DIN, BS, NBN, NF, UNI)

ASTMSTANDARD	UNS NO.	KOREA/JAPANES			GERMAN				BRITISH
ASTMSTANDARD	UNS NO.	KS/JIS Symbol	KS/JIS Numbe	Remarks	DIN Type	DIN Number	Materiral Number	Remarks	B.S Number	B.S Grade	Remarks
A139 Electric-Fusion (Arc)-Welded Steel Pipe
Grade B	K03003			(3)				(3)	3602	SAW 410
Grade C	K03004			(3)				(3)	3602	SAW 410

ASTMSTANDARD	UNS NO.	BELGIAN			FRENCH			ITALIAN
ASTMSTANDARD	UNS NO.	NBN Type	NBN Grade	Remarks	AFNOR Type	NF Number	Ramarks	UNI Type	UNI Number	Ramarks
A139 Electric-Fusion (Arc)-Welded Steel Pipe
Grade B	K03003						(3)			(3)
Grade C	K03004						(3)			(3)

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