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Specifications for ERW steel pipe---ASTM A500

All our structural tubes are produced in accordance with the mechanical and chemical property requirements of ASTM specification A500, Grade A, B, C.

Mechanical Properties

Properties

Grade A

Grade B

Grade C

Tensile Strength, min. psi

45,000 (310Mpa)

58,000 (400Mpa)

62,000 (427Mpa)

Yield Strength, min. psi

39,000 (269Mpa)

46,000 (317Mpa)

50,000 (345Mpa)

Elongation in 2 min.
3/16 wall & heavier
1/8 wall

25%

25%

23%

19.5%

21%

21%

Outside Dimensions

Largest Outside Dimension

Tolerance*

2-1/2 and under

0.020

Over 2-1/2 to 3-1/2 inclusive

0.025

Over 3-1/2 to 5-1/2 inclusive

0.030

Over 5-1/2

1%

*Tolerances include allowance for convexity or concavity. For rectangular tubing having a ratio of outside large to small flat dimension less than 1.5, and for square tubing, the tolerance on small flat dimension shall be identical to the large flat dimension tolerance. For rectangular tubing having a ratio of outside large to small flat dimension in the range of 1.5 to 3.0 inclusive, the tolerance on small flat dimension shall be 1.5 times the large flat dimension tolerance. For rectangular tubing having a ratio of outside large to small flat dimension greater than 3.0, the tolerance on small flat dimension shall be 2.0 times the large flat dimension tolerance.

Chemical Composition

Twist

Chemical

Grades A&B

Grade C

Largest Side

Maximum Twist in 3 feet

Carbon, max. %

0.26

0.23

Over 1-1/2 to 2-1/2 inclusive

.062

Manganese, max. %

---

1.35

Over 2-1/2 to 4 inclusive

.075

Phosphorus, max. %

0.04

0.04

Over 4 to 6 inclusive

.087

Sulphur, max. %

0.05

0.05

Over 6 to 8 inclusive

.100

Cooper, when cooper steel is specified min. %

0.20

0.20

Over 8

.112

Straightness: .025 times the number of feet of total length
Squareness of Sides: Deviation from 90ce by +/-2ce max.

Radius of Corners: The radius of any outside corner shall not exceed three times the specified wall thickness.

Wall thickness: +/-10% of nominal wall thickness, as measured at the center of the flat.

Remarks: a).1 = 0.3048m, 1 = 25.4mm

b).1PSI = 0.00689Mpa

JIS Number and Corrensponding Foreign Standards

JIS
ASTM
BS
DIN
NF
ISO
Index Number
Standard Number
Grade
Tupe
Standard Number
Grade
Tupe
Standard Number
Grade
Tupe
Standard Number
Grade
Tupe
Standard Number
Grade
Tupe
Standard Number
Grade
Tupe
G3444
STK290
C
A252
Gr1
C
A49-642
TS30.0
C
C016
(STK30)
A5000
GrA
C
A49-643
TS30.0
C
A49-643
TS30a
C
A49-644
TS30.0
C
A49-645
TS30.0
C
"
TS30E
C
"
TS30ES
C
STK400
C
A252
Gr2
C
6232
SAW
C
A49-643
TS37a
C
(STK41)
A500
GrB
C
A501
-
C
STK500
C
6323
SAW
C
(STK50)
STK490
C
A49-643
TS47a
C
(STK50)
STK540
C
(STK55)

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