Galvanized I-beams

Carbon steel I-beams, after hot-dip galvanizing, are corrosion-resistant steels that combine the structural bending resistance of I-beams with the comprehensive corrosion protection of a zinc coating.

Classification :

Universal Beam (l-Beam)

WhatsApp : +8617563565680

E-mail : info@sdlxdh.com

PRODUCT DETAILS

Product parameters

product type	Material grade	Production range (model)	standard length	production technology
Stainless steel I-beam	304/304L 316/316L 321/310S 201/430	5# ~ 40# Commonly used 10#/12#/14#/16#/18#/20#/25#/30# Divided into type a/b (different web thickness) Height 50mm~400mm	Standard 6m/support Can be customized to 9m/12m Cut to length as needed Maximum length up to 12m	Hot rolling forming Cold drawing/cold bending Welding assembly Polished/brushed treatment
Carbon steel I-beam	Q235A/B/C/D Q355B/C/D/E Q420/Q460 SS400/ST37-2 S235JR/S355JR	10# ~ 63# Commonly used 10#/12#/14#/16#/18#/20#/22#/25#/28#/30#/36#/40# Divided into a/b/c types (web thickness increases) Height 100mm~630mm	Standard 9m/12m Commonly used 12 meters fixed length 6m/9m optional Custom cutting available on request The longest length can reach 15-18m	Hot rolled one-time forming Welded I-beam High frequency welding T-shaped steel section
Galvanized I-beam	Q235B (mainstream) Q355B Q235C/Q355C SS400/S235JR	10# ~ 40# Commonly used 10#/12#/14#/16#/18#/20#/25#/30#/36# Divided into a/b type Height 100mm~400mm Welded galvanizing can be customized to larger specifications	Standard 6m/12m Commonly used 6 meters fixed length 9m optional Zinc supplement is required for cutting after galvanizing Customization needs to be explained in advance	Hot dip galvanizing process Zinc layer thickness 60-85μm Molding first and then overall immersion plating Full coverage and anti-corrosion without dead ends Passivation/sealing treatment

Material Standards

product type	Implementation standards	surface treatment	Qualification certificate	Application areas
Stainless steel I-beam	GB/T 706-2016 GB/T 3280-2015 GB/T 4237-2015 ASTM A276/A484 JIS G4304	Sour white noodles(NO.1) 2B cold rolled surface Brushed surface(HL) Mirror(8K) Sandblasted surface	ISO9001 quality certification ISO14001 environmental certification SGS test report Material certificate (warranty certificate) Third party inspection report	Petrochemical equipment framework Food processing production line Water treatment environmental protection project coastal building structures Decorative curtain wall project Pharmaceutical clean workshop
Carbon steel I-beam	GB/T 706-2016 (Hot-rolled steel national standard) GB/T 1591-2018 (low alloy high strength steel) ASTM A36/A572 EN 10025 JIS G3101	Hot rolled black leather Sand blasting and rust removal Sa2.5 Apply anti-rust paint/red paint Epoxy zinc rich primer Customizable painting colors	ISO9001 quality certification ISO14001 environmental certification CE EU certification Steel factory original warranty SGS/BV third party inspection	Industrial factory main beam/secondary beam Building Steel Structure Frame bridge engineering support Mechanical equipment base Mine derrick support Port lifting machinery Electric power tower structure
Galvanized I-beam	GB/T 706-2016 (Steel size standard) GB/T 13912-2020 (Technical requirements for hot-dip galvanizing layer) ASTM A123 BSEN ISO 1461	Hot dip galvanized silver white Zinc flower/zinc flower-free surface Chromate passivation treatment Sealer brightening treatment Can be painted with topcoat	ISO9001 quality certification ISO14001 environmental certification Hot dip galvanizing quality certification Zinc layer thickness test report SGS third party inspection	Outdoor billboard bracket Curtain wall keel embedded parts Power communication tower highway guardrail Photovoltaic bracket structure Municipal facility fence Storage shelf columns

I-beam specifications and dimensions

Model	Heighth(mm)	Leg width b(mm)	Waist thickness d(mm)	Average leg thickness t (mm)	Theoretical weight (kg/m)
10#	100	68	4.5	7.6	11.261
12#	120	74	5	8.4	13.987
12.6#	126	74	5	8.4	14.223
14#a	140	80	5.5	9.1	16.89
14#b	140	80	6	9.1	17.517
16#a	160	88	6	9.9	20.513
16#b	160	88	6.5	9.9	21.257
18#a	180	94	6.5	10.7	24.143
18#b	180	94	7	10.7	24.999
20#a	200	100	7	11.4	27.929
20#b	200	102	9	11.4	31.069
22#a	220	110	7.5	12.3	33.07
22#b	220	112	9.5	12.3	36.524
25#a	250	116	8	13	38.105
25#b	250	118	10	13	42.03
28#a	280	122	8.5	13.7	43.492
28#b	280	124	10.5	13.7	47.888
30#a	300	126	9	14.4	48.084
30#b	300	128	11	14.4	52.794
32#a	320	130	9.5	15	52.717
32#b	320	132	11.5	15	57.741
36#a	360	136	10	15.8	60.037
36#b	360	138	12	15.8	65.689
40#a	400	142	10.5	16.5	67.598
40#b	400	144	12.5	16.5	73.878

Performance comparison of I-beam materials

Material category	Trademark	Yield strength	tensile strength	Main features	Applicable scenarios
Carbon steel-plain carbon	Q235B	≥235MPa	375-500MPa	Good plasticity and toughness, excellent weldability, lowest cost and most versatile	Ordinary factories, civil buildings, secondary load-bearing structures
Carbon Steel-Low Alloy	Q355B	≥355MPa	470-630MPa	High strength, good comprehensive mechanical properties, and the most cost-effective	Main load-bearing beams, long-span factory buildings, bridge structures
Carbon steel - low temperature resistant	Q355D/E	≥355MPa	470-630MPa	Excellent low temperature impact toughness, qualified at -20/-40℃	Cold areas, winter construction, outdoor open-air structures
Carbon Steel-High Strength	Q420/Q460	≥420/460MPa	520-680MPa	High strength, reducing structural weight and saving steel consumption	Super high-rise buildings, long-span bridges, heavy equipment
Stainless steel-universal type	304/304L	≥205MPa	≥520MPa	Good corrosion resistance, better weldability of low carbon version, universal	Chemical industry, food, water treatment, general corrosive environment
Stainless steel-corrosion-resistant type	316/316L	≥205MPa	≥520MPa	Added molybdenum element, stronger resistance to pitting corrosion and chloride ion corrosion	Coastal, marine engineering, chemical industry strong acid and alkali environment
Stainless steel-heat-resistant type	321/310S	≥205/205MPa	≥520/520MPa	Resistant to high temperature oxidation, 310S can withstand high temperatures above 1000°C	High temperature furnaces, heat treatment equipment, boiler structures
Stainless steel-economical	201/430	≥275/205MPa	≥520/450MPa	The price is lower, 201 contains high manganese, and 430 is ferrite.	Interior decoration, dry environment, low cost projects

I-beam application fields

Application areas	Specific scene	Recommended products	Common specifications	Key points for selection
industrial plant	Factory primary and secondary beams, crane beams, purlins, platform support beams	Carbon steel I-beam Galvanized I-beam	16#~36# 20#/25#/30# are most commonly used	Choose large models for large spans, heavy-duty models for cranes, and galvanized models for wet conditions.
building structure	Steel structure frame beams, floor load-bearing beams, curtain wall embedded parts	Carbon steel I-beam	14#~30# 16#/20#/25# commonly used	Load-bearing calculation and selection, choose Q355B/C grade for high seismic requirements
bridge engineering	Highway bridge beams, railway bridge supports, construction trestles, pedestrian bridges	Carbon steel I-beam (Q355)	25# ~ 40# 28#/30#/36#	Special steel for bridges is selected for dynamic loads, and low-temperature-resistant materials are selected for low-temperature areas.
Petrochemical industry	Device structure, pipe gallery bracket, equipment platform, reaction tower frame	Stainless steel I-beam (304/316)	10#~25# 14#/16#/20#	Choose 316L for corrosive media, 304 for normal temperature, and select materials strictly according to the medium.
Electric power industry	Transmission tower cross arms, substation structures, power plant boiler brackets	Carbon steel/galvanized I-beam	16#~30# 20#/25# commonly used	Choose galvanized anti-corrosion for outdoor use, heat-resistant steel for high-temperature areas, and 316 for coastal areas.
Machinery manufacturing	Equipment base, rack beam, production line frame, crane arm	Carbon steel I-beam	12#~36# Customized on demand	Choose large specifications for heavy equipment, and choose high straightness for precision equipment.
mine tunnel	Headframe support, tunnel support, mine car track, lifting equipment rack	Carbon steel I-beam (Q235/Q355)	20#~36# 25#/30# commonly used	Consider anti-corrosion in underground projects, and choose materials with good toughness for impact loads.
port terminal	Crane track beams, yard racks, fender piles, boarding bridges	Galvanized/stainless steel I-beam	25# ~ 40# 30#/36# commonly used	Choose galvanized or 316 stainless steel for high humidity and salt at the seaside, and choose larger models for heavy loads.
Municipal Engineering	Billboard brackets, guardrail columns, canopy beams, overpasses	Galvanized I-beam	10#~25# 14#/16#/20# commonly used	For outdoor exposure, choose galvanizing for aesthetics and anti-corrosion. For decoration, stainless steel can be considered.
decoration decoration	Interior decorative beams, ceiling keels, stair handrails, modeling structures	Stainless steel I-beam	Small size 5# ~ 16# Can be polished/brushed	Choose brushed stainless steel/mirror for exposed decoration, and choose galvanized economical type for concealed decoration.

Customer Praise

All products comply with global mainstream standards: API 5L/5CT, ASTM A106/A53/A335, EN 10216, ISO 3183, JIS and GB standards. Complete MTC and third-party inspection certificates are available.

APPLICATION FIELD

Agricultural Machinery

Aerospace

Shipbuilding

Bridge

Oil pipeline

Chemical industry

Steel structure

Architecture

CUSTOMER VISIT

Customer Visit

FAQ

1.Are You Manufacture or Trade Company?

We are the professional manufacturer of steel products located in China. Welcome to contact us and visit our factory before you place orders.

2. How do you guarantee the quality?

We can send you free samples and also accept third-party testing. We also have test certificates. Every batch of goods is tested before shipment, and the test report will be sent to you by mail or online.

3. Can I get free samples?

Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.

4. What is the MOQ?

If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.

5.Can you OEM or ODM?

Yes, we have a strong developing team. The products can be made according to your request.

6.What about your price?

Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products.