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{"title":"Factory Supply S235JR S355JR Square Tube with Black Surface Treatment Size 40*40","imgUrl":"https:\/\/img.ismap.com\/nimg\/96\/b7\/b1955810c8622d5473f345668afd-200x200-1\/factory_supply_s235jr_s355jr_square_tube_with_black_surface_treatment_size_40_2a40_500_2a500.jpg","attrs":{"Minimum Order Quantity":"50 Tons","Price":"US $650-1,250 \/ Ton","Section Shape":"Square","Size Range":"40*40 - 500*500"}}
{"title":"S355JR Carbon Steel Seamless Square Tube with Black Surface Treatment in 30*30","imgUrl":"https:\/\/img.ismap.com\/nimg\/d1\/ef\/b47b514f844a1c5f6fd437deec8f-200x200-1\/s355jr_carbon_steel_seamless_square_tube_with_black_surface_treatment_in_30_2a30_500_2a500_sizes.jpg","attrs":{"Minimum Order Quantity":"50 Tons","Price":"US $650-1,250 \/ Ton","Section Shape":"Square","Size Range":"30*30-500*500"}}
{"title":"Black Surface Galvanized Square Steel Tube 30*30-500*500 for Construction and","imgUrl":"https:\/\/img.ismap.com\/nimg\/44\/e5\/70415462ddb53481afb82e500ab1-200x200-1\/black_surface_galvanized_square_steel_tube_30_2a30_500_2a500_for_construction_and_machinery.jpg","attrs":{"Minimum Order Quantity":"50 Tons","Price":"US $651-985 \/ Ton","Section Shape":"Square","Size Range":"30*30-500*500"}}
{"title":"Low Carbon Seamless Square Steel Pipe with Black Surface Treatment and 30*30-500","imgUrl":"https:\/\/img.ismap.com\/nimg\/ca\/5d\/e7e879193fd877bb13615e5373a8-200x200-1\/low_carbon_seamless_square_steel_pipe_with_black_surface_treatment_and_30_2a30_500_2a500_size_range.jpg","attrs":{"Minimum Order Quantity":"50 Tons","Price":"US $652-986 \/ Ton","Surface Treatment":"Black","Section Shape":"Square"}}
{"title":"China Black Surface Treatment Seamless Square Steel Pipe 30*30-500*500 for","imgUrl":"https:\/\/img.ismap.com\/nimg\/3a\/1b\/dd8d4123867ed58b6ca2022440eb-200x200-1\/china_black_surface_treatment_seamless_square_steel_pipe_30_2a30_500_2a500_for_construction_and_machinery.jpg","attrs":{"Minimum Order Quantity":"10 Tons per size","Price":"US $653-987 \/ Ton","Surface Treatment":"Black","Section Shape":"Square"}}
{"title":"Black Surface Treatment Square Steel Tube 10*10 to 400*400 Size Range Factory","imgUrl":"https:\/\/img.ismap.com\/nimg\/13\/74\/feb5c75461aaa1380c96c199cd8c-200x200-1\/black_surface_treatment_square_steel_tube_10_2a10_to_400_2a400_size_range_factory_direct_supply.jpg","attrs":{"Minimum Order Quantity":"10 Tons per size","Price":"US $654-988 \/ Ton","Section Shape":"Square","Size Range":"10*10 to 400*400"}}
High-quality welded square steel pipes manufactured to S275JR standards, available in black iron finish.
These structural hollow sections are designed for demanding industrial applications.
Product Specifications
Available Dimensions
Product Type
Size Range
Thickness
Length
Round Pipe
OD 310mm - 1000mm
4mm - 30mm
Custom lengths available
Square Pipe
10mm×10mm - 1000mm×1000mm
1.2mm - 30.0mm
Standard and custom
Rectangle Pipe
20mm×40mm - 400mm×700mm
1.2mm - 30.0mm
Standard and custom
L/T/Z Window Section
28mm/38mm
0.5mm - 1.5mm
Standard lengths
Technical Details
Material Grades: Q195, Q215, Q235, Q345 and equivalent standards
Surface Treatment: Black or bright finish, painted or oiled options
Packing: Export standard packaging (bundles, seaworthy containers)
Delivery Port: Shanghai, China
Lead Time: Within 30 days after receiving original L/C or deposit
Minimum Order Quantity: 10 Tons per size
Production Capacity: 10,000 MT per month
Applications
Widely used in structural applications, motorbike and automobile manufacturing, ornamental uses,
medical equipment, sports equipment, and home furniture.
EN 10025 S355 Steel Specifications
S355 steel is a European standard structural steel grade according to EN 10025-2:2004,
offering superior mechanical properties compared to S235 and S275 grades in both yield strength and tensile strength.
S355 Quality Grades
S355JR (1.0045): Minimum 27J impact energy at 20°C
S355J0 (1.0553): Minimum 27J impact energy at 0°C
S355J2 (1.0577): Minimum 27J impact energy at -20°C
S355K2 (1.0596): Minimum 40J impact energy at -20°C
Chemical Composition
Steel Grade
C (%)
Si (%)
Mn (%)
P (%)
S (%)
Cu (%)
N (%)
Deoxidation
S355JR
≤0.24
≤0.55
≤1.60
≤0.035
≤0.035
≤0.55
≤0.012
Rimmed steel not allowed
S355J0
≤0.20
≤0.55
≤1.60
≤0.030
≤0.030
≤0.55
≤0.012
-
S355J2
≤0.20
≤0.55
≤1.60
≤0.025
≤0.025
≤0.55
-
Fully killed
S355K2
≤0.20
≤0.55
≤1.60
≤0.025
≤0.025
≤0.55
-
Fully killed
Mechanical Properties - Yield Strength
Steel Grade
d≤16mm
16<d≤40mm
40<d≤63mm
63<d≤80mm
80<d≤100mm
100<d≤150mm
150<d≤200mm
200<d≤250mm
S355JR
355 N/mm²
345 N/mm²
335 N/mm²
325 N/mm²
315 N/mm²
295 N/mm²
285 N/mm²
275 N/mm²
Mechanical Properties - Tensile Strength
Steel Grade
d<3mm
3≤d≤100mm
100<d≤250mm
S355JR
510-680 N/mm²
470-630 N/mm²
450-600 N/mm²
Mechanical Properties - Elongation
Steel Grade
3≤d≤40mm
40<d≤63mm
63<d≤100mm
100<d≤150mm
150<d≤250mm
S355JR
22%
21%
20%
18%
17%
S355K2
20%
19%
18%
18%
17%
Product Images
Global Markets: Europe, America, Africa, Southeast Asia
We welcome both existing and new customers to contact us for negotiations and further communication regarding your steel pipe requirements.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification:
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...