info@lefinsteel.com

+8615122229899

Home
About us
Products
Resource
Project
Service Capability
Certificates
Contact Us

中文

Tianjin Lefin Industrial Co.,Ltd

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

PRODUCT

ABOUT US

Service Capability

Certificates

Project

Tianjin Lefin Industrial Co.,Ltd.

Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard

OEM&ODM

Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.

PRODUCTS CENTER

cape verde STEEL HOLLOW SECTIONS

cape verde HOT DIP GALVANIZED STEEL PIPE

cape verde ASTM A501 Steel Structural Tubing

ASTM A501 Hot-Formed Welded and Seamless Carbon Steel Structural Tubing Grade: GR.A, GR.B, GR.C Wall Thickness Tolerance: Control within the standard limits Length: 1 - 12M, normally 5.8M,6M, 12M, also depends on the requirements Surface treatment: Galvanizing, Black vanish, Carving, Slightly oil painting, PVC clothes cover each bundle etc. Production capacity: 300000 tons per year. Production delivery time:15 -- 30 days acc to order quantity and sizes. Shipping: Bulk vessel shipment & Container shipment. Brand: LEFIN STEEL

Category:

cape verdeSTEEL HOLLOW SECTIONS

+86 22 58171905

Inquire

Product Description

Overview
ASTM A501 is a standard specification for hot-formed welded and seamless carbon steel structural tubing used in construction, bridges, and other load-bearing applications. It covers round, square, rectangular, and special-shaped steel tubes designed for structural purposes, offering high strength and weldability.

Key Features:

Standard	ASTM A501/A501M
Material	Carbon steel with specified mechanical properties
Manufacture	Hot-formed weleded and seamless
Grade	Grade A, Grade B, and Grade C
Shape	Round, square, rectangular, or special shapes
Strength	High yield and tensile strength, suitable for structural applications.
Round tubing Dimensions	Diameters 1 – 48 in. [25 – 1220 mm] and wall thickness of 0.095 – 4.00 in. [2.5 – 100 mm]
Free download	ASTM A501/A501M – 2021.pdf

Dimension:

Hollow Section Shape (HSS)	Outer Diameter	Wall Thickness
Square and rectangular tubing	1.0 – 16 in [25 – 405 mm]	0.095 – 1.0 in [2.5 – 25 mm]
Round tubing	1.0 – 48 in [25 – 1220 mm]	0.095 – 4.0 in [2.5 – 100 mm]

Chemical Composition (Requirements)

Composition, %	Grade A		Grade B and Grade C
Composition, %	Heat Analysis	Product Analysis	Heat Analysis	Product Analysis
Carbon, max ^B	0.26	0.30	0.22	0.26
Manganese, max ^B	-	-	1.40	1.45
Phosphorus, max	0.035	0.045	0.030	0.040
Sulfur, max	0.035	0.045	0.020	0.030
Copper, min (when copper steel is specified)	0.20	0.18	0.20	0.18

^B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.60 % by heat analysis and 1.65 % by-product analysis.

Mechanical Properties

Property		Wall Thickness in [mm]	Grade A	Grade B	Grade C
Tensile strength, min, psi [MPa]		All	58,000 [400]	65000 [448]	70,000 [483]
Yield strength, min, psi [MPa]		≤ 1 [25]	39,000 [270]	46,000 [315]	50,000 [345]
		＞1 [25] and ≤ 2 [50]	38,000 [260]	45,000 [310]	49,000 [340]
		＞2 [50] and ≤ 3 [76]	36,500 [250]	42,500 [290]	47,500 [330]
		＞3 [76] and ≤ 4 [100]	35,000 [240]	40,000 [280]	46,000 [315]
Elongation, min, %		-	25	24	23
Impact Energy	min, average, ft/Ibf [J]	-	20 [27]	20 [27]	20 [27]
Impact Energy	min, single, ft/Ibf [J]	-	14 [19]	14 [19]	14 [19]

Tolerance

	Tolerance		Shape
Outer Diameter	＞2 in [50 mm]	±1 %	all
	≤ 2 in [50 mm]	±1/48 in [0.50 mm]
Wall Thickness	-10 %		all
Weight	-3.5 % – +10%		all
Length (L)	≤ 7m [22 ft]	-1/4 in – +1/2 in [-6 mm – +13 mm]	all
	7-14m [22-44 ft]	-1/4 in – +3/4 in [-6 mm – +19 mm]
Straightness	Lengths (L) are ft: L/40 (Results in inch); Lengths (L) are m: 2L (Results in mm);		all
Squareness of Sides	±1°		square and rectangular
Radius of Corners	each outside corner of the section shall not exceed two times the specified wall thickness.		square, rectangular, and special shapes
Twist	not vary more than 1/12 in [2.1 mm] plus 1/144 in/ft [0.5 mm/m]		square, rectangular, and special shapes
Concavity and Convexity	1 % from the outside dimension		square, rectangular, and special shapes

ASTM A501 structural pipe is mostly available in random lengths of 16-22 ft (5-7 m) or 32-44 ft (10-14 m), and can also be supplied in specified lengths.

Applications
ASTM A501 steel tubes are widely used in:

Structural frameworks (buildings, bridges, towers)
Construction supports (columns, beams, trusses)
Industrial equipment (scaffolding, machinery frames)
Infrastructure projects (highway guardrails, sign structures)

Advantages
Cost-effective: Lower production costs compared to cold-formed tubes (e.g., ASTM A500).

High strength-to-weight ratio: Suitable for heavy-load structures.

Weldability & Formability: Easily welded and fabricated into complex shapes.

Durability: Resistant to deformation under stress.

Comparison With Other Standards
ASTM A500: Cold-formed structural tubing with tighter tolerances but higher cost.

ASTM A53: General-purpose pipe (not specifically for structural use).

ASTM A1085: Improved properties and sustainability features.

Conclusion
ASTM A501 steel tubes are a versatile, economical choice for structural applications where high strength and weldability are critical. Their hot-formed manufacturing process ensures robustness, making them ideal for construction and heavy engineering projects.