🟦 Product Overview

ASTM I Section is produced according to ASTM A6, the general requirements standard for rolled structural steel. Common material grades include ASTM A992, ASTM A572, and ASTM A36, covering both high‑strength low‑alloy and carbon structural steel.

ASTM I‑Beams provide excellent structural strength, weldability, and dimensional precision. They are widely used in building structures, industrial frameworks, bridge construction, and heavy engineering applications across North America and global EPC projects.

ASTM I Sections follow standardized dimensions and tolerances, ensuring consistent performance and compatibility with international engineering requirements.

🟦 Applicable Standards

• ASTM A6 – General requirements for rolled structural steel
• ASTM A992 – High‑strength low‑alloy structural steel
• ASTM A572 – High‑strength low‑alloy structural steel (Grades 42 / 50 / 55 / 60 / 65)
• ASTM A36 – Carbon structural steel

🟦 Available Grades

• ASTM A992 (most common for building structures)
• ASTM A572 Grade 50 / 55 / 60 / 65
• ASTM A36

These grades cover general structural applications and high‑strength engineering requirements.

🟦 Dimensions Range

Parameter	Range
Height (H)	80–1000 mm
Flange Width (B)	50–300 mm
Web Thickness (t1)	4–25 mm
Flange Thickness (t2)	6–40 mm
Length	6 m / 9 m / 12 m / custom
Tolerance	As per ASTM A6

Designation	Unit Weight (kg/m)	H (mm)	B (mm)	tₜ (mm)	tᵣ (mm)	r₁ (mm)	r₂ (mm)	Sectional Area (mm² × 10⁻²)
S 75 × 8.5*	8.5	76	59	4.3	6.6	7.0	2.1	10.8
S 75 × 11.2*	11.2	76	64	8.9	6.6	7.0	3.8	14.3
S 100 × 11.5*	11.5	102	68	4.9	7.4	7.5	4.4	14.8
S 100 × 14.1*	14.1	102	71	8.3	7.4	7.5	4.4	18.0
S 130 × 15*	15.0	127	76	5.4	8.3	7.9	4.6	19.1
S 150 × 18.6*	18.6	152	85	5.9	9.1	7.9	4.9	23.6
S 150 × 25.7*	25.7	152	91	11.8	9.1	8.3	5.0	32.6
S 200 × 27.4*	27.4	203	102	6.9	10.8	9.5	5.5	34.9
S 200 × 34*	34.0	203	106	11.2	10.8	9.5	5.5	43.7
S 250 × 37.8*	37.8	254	112	7.9	12.5	10.5	6.0	48.3
S 250 × 52*	52.0	254	126	15.1	12.5	10.5	6.0	66.5
S 310 × 47.3*	47.3	305	127	8.9	13.8	11.5	6.5	60.3
S 310 × 52*	52.0	305	129	10.9	13.8	11.5	6.5	66.5
S 310 × 60.7*	60.7	305	133	11.7	17.7	14.0	6.5	77.4
S 310 × 74*	74.0	305	139	17.4	16.7	14.0	6.5	94.8
S 380 × 64*	64.0	381	140	10.4	15.8	13.0	6.5	81.3
S 380 × 74*	74.0	381	143	14.0	15.8	13.0	7.8	94.8
S 460 × 81.4*	81.4	457	152	11.7	17.6	14.5	9.0	104
S 460 × 104*	104	457	159	18.1	17.6	14.5	9.0	133
S 510 × 98*	98.0	508	159	12.8	20.2	15.0	9.4	125
S 510 × 112*	112	508	162	16.8	20.2	15.0	9.4	142
S 510 × 128*	128	516	179	16.8	23.4	15.0	9.4	163
S 510 × 143*	143	516	183	20.3	23.4	15.0	9.4	182
S 610 × 119*	119	610	178	12.7	22.1	15.5	9.6	152
S 610 × 134*	134	610	181	15.9	22.1	15.5	9.6	171
S 610 × 149*	149	610	184	18.9	22.1	15.5	9.6	189
S 610 × 158*	158	622	200	15.7	27.7	15.5	9.6	201
S 610 × 180*	180	622	204	20.3	27.7	15.5	9.6	230

🟦 Mechanical Properties

ASTM A992

Property	Value
Yield Strength	≥ 345 MPa
Tensile Strength	450–630 MPa
Elongation	≥ 18%

ASTM A572 Grade 50

Property	Value
Yield Strength	≥ 345 MPa
Tensile Strength	≥ 450 MPa
Elongation	≥ 18%

ASTM A36

Property	Value
Yield Strength	≥ 250 MPa
Tensile Strength	400–550 MPa
Elongation	≥ 20%

🟦 Chemical Composition (Typical)

ASTM A992

Element	Max (%)
C	0.23
Mn	0.50–1.50
P	0.035
S	0.045
Si	0.40
V	0.08

ASTM A36

Element	Max (%)
C	0.25
Mn	0.80–1.20
P	0.040
S	0.050
Si	0.40

🟦 Applications

• Building structures
• Industrial steel frameworks
• Bridge girders and support beams
• Machinery and equipment support
• General structural engineering
• Warehouse and workshop construction

🟦 Why Use ASTM I Section

• Standardized American dimensions
• High strength‑to‑weight ratio
• Excellent weldability and fabrication properties
• Suitable for heavy load‑bearing applications
• Widely used in global construction standards

🟦 Why Choose WelSteels

• Full range of ASTM A992, A572, and A36 I‑beams
• Strict dimensional and mechanical testing
• CNC cutting, drilling, and fabrication services
• SGS / BV third‑party inspection available
• Export‑grade seaworthy packaging
• Fast delivery from stock and mill production