Q235B I-Beam | S235JR A36 SS400 Hot Rolled I Beam for Construction Structural Support

Excellent weldability and formability, easy for on-site fabrication
Low cost general carbon structural steel, cost-effective for common projects
Stable mechanical performance, reliable for secondary load bearing
Global standard equivalence, compatible with international project specs
Wide size range & cut-to-length service available

Product Overview

Q235B Hot Rolled I-Beam is a widely used carbon structural I-shaped steel section, equivalent grade S235JR (EU), A36 (ASTM), SS400 (JIS). Manufactured strictly following GB/T706, EN10025, ASTM A6 and JIS G3192 standards.

This Q235B I beam covers Chinese light & heavy duty I-beam sizes, European IPN series, American S-series and Japanese IS-series. Standard delivery lengths: 6m,9m,12m, custom cut length from 3m to 18m available.

The material features good ductility and outstanding weld performance. Surface options include hot rolled black finish, shot blasting, pickling, anti-corrosion paint and hot-dip galvanizing. We provide end beveling, drilling, cutting and drawing-based custom machining.

Q235B I-Beam is mainly applied for general building secondary beams, support frames, pipeline brackets, warehouse rack beams, temporary construction structures and mechanical base supports. Mill Test Certificate will be supplied for every shipment to verify chemical & mechanical properties.

I-Beam

Chemical & Mechanical Property Snapshot

Grade	Standard	C Max %	Si Max %	Mn Max %	P Max %	S Max %	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (A5) %
Q235B	GB/T706	0.20	0.35	1.40	0.045	0.045	≥235	370~500	≥26
S235JR	EN10025	0.17	0.35	1.40	0.035	0.035	≥235	360~510	≥25
A36	ASTM A6	0.25	0.40	1.20	0.040	0.050	≥250	400~550	≥20
SS400	JIS G3192	0.25	—	1.40	0.040	0.040	≥245	400~510	≥21

Detailed Technical Specifications

Technical Item	Detailed Specification
Product Name	Q235B I-Beam
Product Type	Hot-Rolled I-Shaped Structural Steel
Level 1 Category	Structural Section/Profile
Level 2 Category	H & I & W Beam
Level 3 Category	I-Beam
Applicable Standards	GB/T706; EN10025; ASTM A6; JIS G3192
Chinese Light-Duty Series	10#, 12#, 14#, 16#, 18#, 20a/20b, 22a/22b, 25a/25b, 28a/28b
Chinese Heavy-Duty Series	30a/30b/30c, 36a/36b/36c, 40a/40b/40c, 45a/45b/45c, 56a/56b/56c, 63a/63b/63c
European Series	IPN80, IPN100, IPN120, IPN140, IPN160, IPN180, IPN200, IPN220, IPN240, IPN270, IPN300, IPN330, IPN360, IPN400, IPN450, IPN500, IPN550
American S-Series	S6×12.5, S8×18.4, S10×25.4, S12×31.8, S15×42.9, S18×54.7, S20×65.4, S24×79.9
Japanese IS-Series	IS100, IS125, IS150, IS200, IS250, IS300, IS350, IS400
Equivalent Grades	Q235B, S235JR, A36, SS400
Standard Lengths	6 m / 9 m / 12 m
Custom Lengths	3-18 m
Cut-to-Length	Available
Original Surface	Hot-Rolled Black Finish
Surface Treatment	Shot-Blasting, Pickling, Anti-Corrosive Paint, Hot-Dip Galvanizing, Fire-Retardant Coating
Machining Services	End Beveling, Drilling, Cutting
Drawing-Based Processing	Cutting and processing according to customer drawings
Quality Documentation	Mill Test Certificate
MTC Verification	Chemical Composition and Mechanical Performance
Packing	Seaworthy Export-Grade Packing, Steel strips bundled, wrapped with waterproof plastic sheet; suitable for sea freight container
Industrial Applications	Secondary beams, equipment platform supports, steel platform frames
Municipal Applications	Pipeline brackets, street lamp foundation supports, municipal retaining wall supports
Civil Construction	Window lintels, mezzanine bearing beams, stair support beams
Warehouse Applications	Secondary beams for warehouse racks
Temporary Construction	Temporary construction beams
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7-15 working days after receiving deposit

Dimension Table

Designation	Height (H) mm	Flange Width (B) mm	Web Thickness (tw) mm	Flange Thickness (tf) mm	Weight kg/m	Section Area cm²
I10#	100	68	4.5	7.6	11.26	14.3
I12#	120	74	5.0	8.4	13.99	17.8
I14#	140	80	5.5	9.1	16.89	21.5
I16#	160	88	6.0	9.9	20.51	26.1
I18#	180	94	6.5	10.7	24.14	30.8
I20a	200	100	7.0	11.4	27.91	35.5
I20b	200	102	9.0	11.4	31.07	39.5
I22a	220	110	7.5	12.3	33.07	42.0
I22b	220	112	9.5	12.3	36.52	46.4
I25a	250	116	8.0	13.0	38.11	48.5
I25b	250	118	10.0	13.0	42.03	53.5
I28a	280	122	8.5	13.7	43.49	55.4
I28b	280	124	10.5	13.7	47.89	61.0
I30a	300	126	9.0	14.4	48.00	61.2
I30b	300	128	11.0	14.4	52.79	67.2
I30c	300	130	13.0	14.4	57.50	73.2
I36a	360	136	10.0	15.8	60.04	76.3
I36b	360	138	12.0	15.8	65.69	83.5
I36c	360	140	14.0	15.8	71.34	90.7
I40a	400	142	10.5	16.5	67.59	86.1
I40b	400	144	12.5	16.5	73.87	94.1
I40c	400	146	14.5	16.5	80.16	102.1
I45a	450	150	11.5	18.0	80.42	102.4
I45b	450	152	13.5	18.0	87.48	111.4
I45c	450	154	15.5	18.0	94.55	120.4
I56a	560	166	12.5	21.0	106.32	135.4
I56b	560	168	14.5	21.0	115.11	146.5
I56c	560	170	16.5	21.0	123.90	157.6
I63a	630	176	13.0	22.0	121.41	154.7
I63b	630	178	15.0	22.0	131.30	167.3
I63c	630	180	17.0	22.0	141.19	179.9
IPN80	80	42	3.9	5.9	6.0	7.6
IPN100	100	50	4.5	6.8	8.3	10.6
IPN120	120	58	5.1	7.7	11.1	14.2
IPN140	140	66	5.7	8.6	14.3	18.3
IPN160	160	74	6.3	9.5	17.9	22.8
IPN180	180	82	6.9	10.4	21.9	27.9
IPN200	200	90	7.5	11.3	26.2	33.4
IPN220	220	98	8.1	12.2	31.1	39.5
IPN240	240	106	8.7	13.1	36.4	46.2
IPN270	270	114	9.5	14.2	42.2	53.7
IPN300	300	124	10.2	15.3	48.1	61.3
IPN330	330	133	11.0	16.3	54.7	69.7
IPN360	360	142	11.8	17.4	61.2	78.2
IPN400	400	152	12.8	18.6	69.4	88.5
IPN450	450	165	14.0	20.0	79.6	101.5
IPN500	500	177	15.2	21.3	90.7	115.7
IPN550	550	190	16.5	22.7	103.0	131.2
S6×12.5	152.4	63.5	4.3	7.5	18.6	23.7
S8×18.4	203.2	80.0	5.3	8.8	27.4	34.9
S10×25.4	254.0	88.9	6.1	10.2	37.8	48.1
S12×31.8	304.8	101.6	6.6	10.9	47.3	60.1
S15×42.9	381.0	127.0	7.9	12.8	63.8	81.1
S18×54.7	457.2	152.4	9.0	14.5	81.4	103.5
S20×65.4	508.0	152.4	10.0	16.0	97.3	123.7
S24×79.9	609.6	177.8	10.9	17.4	119.0	151.3
IS100	100	50	4.2	7.2	8.4	10.7
IS125	125	65	4.8	8.1	11.9	15.1
IS150	150	75	5.4	9.0	15.7	19.9
IS200	200	100	6.2	10.2	25.4	32.3
IS250	250	125	6.9	11.6	37.3	47.5
IS300	300	150	7.6	13.0	50.7	64.5
IS350	350	165	8.1	14.2	61.8	78.6
IS400	400	180	8.6	15.3	72.5	92.2

Product Comparison Table

Material Grade	Equivalent International Grade	Standard	Min Yield Strength (MPa)	Tensile Strength (MPa)	Core Features	Typical Application
Q235B	S235JR / A36 / SS400	GB/T706, EN10025, ASTM A6, JIS G3192	235	370~500	General carbon steel, excellent weldability, low cost, easy fabrication	Common building beams, support frames, general civil structures
S235JR	Q235B / A36 / SS400	EN10025, GB/T706, ASTM A6, JIS G3192	235	360~510	EU standard general carbon steel, good ductility and weldability	European standard civil construction & secondary support structures
A36	Q235B / S235JR / SS400	ASTM A6, GB/T706, EN10025, JIS G3192	250	400~550	American standard general structural carbon steel, versatile	US standard building & construction support projects
SS400	Q235B / S235JR / A36	JIS G3192, GB/T706, EN10025, ASTM A6	245	400~510	JIS general structural steel, stable performance	Japanese standard construction and frame projects

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Small Equipment Frame

Pipe Support

Factory Secondary Beam

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is Q235B I-Beam equivalent grade?

Q235B I-Beam is equivalent to S235JR (EN), A36 (ASTM), SS400 (JIS). They are interchangeable for most general structural projects.

What is the delivery length of Q235B I beam?

Standard lengths are 6m,9m,12m. We provide custom cut length from 3m to 18m according to your drawing.

Can you do hot dip galvanizing for Q235B I-Beam?

Yes. Surface treatments include hot dip galvanizing, anti-rust painting, shot blasting, pickling. Custom machining like drilling and end cutting is supported.

What documents can you provide for Q235B I-Beam?

We supply Mill Test Certificate (MTC) to certify chemical composition and mechanical properties, meeting international inspection requirements.

What is the MOQ for Q235B I-Beam?

Minimum order quantity is 5 tons. We accept T/T and L/C at sight payment terms, delivery within 7-15 working days after deposit.

Related Projects

Steel And Metal Materials Supplied To Projects Worldwide.

Learn More

Vietnam Binh Duong Foreign-Invested Industrial Park Project

A large-scale foreign-invested smart manufacturing industrial park was developed in Binh Duong Province, Vietnam. The project included three large-span steel structure workshops w…

Texas Commercial Warehouse & Logistics Center Project, USA

A large-scale e-commerce logistics center was constructed near Houston, Texas, USA, featuring a single-story large-span steel structure designed for modern warehousing and distribu…

Middle East Petrochemical EPC Project

A petrochemical EPC project in the Middle East involved the construction of new raw material storage tanks and shell-and-tube heat exchanger systems for an oil refining supporting …

Q235B I-Beam | S235JR A36 SS400 Hot Rolled I Beam for Construction Structural Support