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Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
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Steel Pipe Processing
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 -
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Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
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
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
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.
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Republic of Vanuatu ASTM A501 Steel Structural Tubing
Category:
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 | ||
| 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] |
| 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.
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Phone: +86 22 58171905
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E-mail:info@lefinsteel.com
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