SS400 carbon steel is a widely used low-carbon structural steel defined under JIS G3101. Its low carbon content provides excellent ductility, making it suitable for forming into various profiles, including equal and unequal angles.
SS400 steel is similar in mechanical properties to ASTM A36, making it extensively used in construction, machinery, shipbuilding, and other industrial applications.
Due to its low alloy content, SS400 angle steel requires surface protection such as hot-dip galvanizing or painting to resist corrosion. Zinc-coating thickness and paint colors can be customized according to project requirements, providing both durability and aesthetic appeal.
Product Specifications
Standards & Technology:
Standard: JIS G3101-SS400
Production Method: Hot Rolled
Type: Equal and Unequal Angles
Surface: Black, galvanized, or painted
Length: 6 m, 9 m, 12 m, or as per customer request
Equal Angle Sizes:
Leg Length: 20 × 20 mm to 200 × 200 mm
Thickness: 3 mm – 20 mm
Unequal Angle Sizes:
Leg Length: 30 × 20 mm to 250 × 90 mm
Thickness: 3 mm – 10 mm
Chemical Composition (Max %)
| Element | C | Mn | P | S |
|---|---|---|---|---|
| SS400 | – | – | 0.05 | 0.05 |
Mechanical Properties
| Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| ≤16 | ≥245 | 400 – 510 | 21 |
| 16 – 40 | ≥235 | 400 – 510 | 17 – 21 |
| Item | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) | Item | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|---|
| ESS400001 | 20 | 20 | 3 | 0.889 | ESS400045 | 80 | 80 | 7 | 8.525 |
| ESS400002 | 20 | 20 | 4 | 1.145 | ESS400046 | 80 | 80 | 8 | 9.658 |
| ESS400003 | 25 | 25 | 3 | 1.124 | ESS400047 | 80 | 80 | 10 | 11.874 |
| ESS400004 | 25 | 25 | 4 | 1.459 | ESS400048 | 90 | 90 | 6 | 8.35 |
| ESS400005 | 30 | 30 | 3 | 1.373 | ESS400049 | 90 | 90 | 7 | 9.656 |
| ESS400006 | 30 | 30 | 4 | 1.786 | ESS400050 | 90 | 90 | 8 | 10.946 |
| ESS400007 | 35 | 35 | 3 | 1.578 | ESS400051 | 90 | 90 | 10 | 13.476 |
| ESS400008 | 35 | 35 | 4 | 2.072 | ESS400052 | 90 | 90 | 12 | 15.94 |
| ESS400009 | 35 | 35 | 5 | 2.551 | ESS400053 | 100 | 100 | 6 | 9.366 |
| ESS400010 | 40 | 40 | 3 | 1.852 | ESS400054 | 100 | 100 | 7 | 10.83 |
| ESS400011 | 40 | 40 | 4 | 2.422 | ESS400055 | 100 | 100 | 8 | 10.276 |
| ESS400012 | 40 | 40 | 5 | 1.976 | ESS400056 | 100 | 100 | 10 | 15.12 |
| ESS400013 | 44 | 44 | 3 | 2.002 | ESS400057 | 100 | 100 | 12 | 17.898 |
| ESS400014 | 44 | 44 | 4 | 2.638 | ESS400058 | 100 | 100 | 14 | 20.611 |
| ESS400015 | 38 | 38 | 3 | 1.719 | ESS400059 | 100 | 100 | 16 | 23.257 |
| ESS400016 | 38 | 38 | 4 | 2.261 | ESS400060 | 110 | 110 | 7 | 11.928 |
| ESS400017 | 48 | 48 | 3 | 2.19 | ESS400061 | 110 | 110 | 8 | 13.532 |
| ESS400018 | 48 | 48 | 4 | 2.889 | ESS400062 | 110 | 110 | 10 | 16.69 |
| ESS400019 | 48 | 48 | 5 | 3.572 | ESS400063 | 110 | 110 | 12 | 19.782 |
| ESS400020 | 50 | 50 | 3 | 2.332 | ESS400064 | 110 | 110 | 14 | 22.809 |
| ESS400021 | 50 | 50 | 4 | 3.059 | ESS400065 | 125 | 125 | 8 | 15.504 |
| ESS400022 | 50 | 50 | 5 | 3.77 | ESS400066 | 125 | 125 | 10 | 19.133 |
| ESS400023 | 50 | 50 | 6 | 4.465 | ESS400067 | 125 | 125 | 12 | 22.692 |
| ESS400024 | 56 | 56 | 3 | 2.624 | ESS400068 | 125 | 125 | 14 | 26.193 |
| ESS400025 | 56 | 56 | 4 | 3.446 | ESS400069 | 140 | 140 | 10 | 21.488 |
| ESS400026 | 56 | 56 | 5 | 4.251 | ESS400070 | 140 | 140 | 12 | 25.522 |
| ESS400027 | 56 | 56 | 6 | 6.568 | ESS400071 | 140 | 140 | 14 | 29.49 |
| ESS400028 | 63 | 63 | 4 | 3.907 | ESS400072 | 140 | 140 | 16 | 33.393 |
| ESS400029 | 63 | 63 | 5 | 4.822 | ESS400073 | 160 | 160 | 10 | 24.724 |
| ESS400030 | 63 | 63 | 6 | 5.721 | ESS400074 | 160 | 160 | 12 | 29.391 |
| ESS400031 | 63 | 63 | 8 | 7.469 | ESS400075 | 160 | 160 | 14 | 33.987 |
| ESS400032 | 63 | 63 | 10 | 9.151 | ESS400076 | 160 | 160 | 16 | 38.518 |
| ESS400033 | 70 | 70 | 4 | 4.372 | ESS400077 | 180 | 180 | 12 | 33.159 |
| ESS400034 | 70 | 70 | 5 | 5.397 | ESS400078 | 180 | 180 | 14 | 35.383 |
| ESS400035 | 70 | 70 | 6 | 6.406 | ESS400079 | 180 | 180 | 16 | 43.452 |
| ESS400036 | 70 | 70 | 7 | 7.398 | ESS400080 | 180 | 180 | 18 | 48.634 |
| ESS400037 | 70 | 70 | 8 | 8.373 | ESS400081 | 200 | 200 | 14 | 42.894 |
| ESS400038 | 75 | 75 | 5 | 5.818 | ESS400082 | 200 | 200 | 16 | 48.56 |
| ESS400039 | 75 | 75 | 6 | 6.905 | ESS400083 | 200 | 200 | 18 | 54.501 |
| ESS400040 | 75 | 75 | 7 | 7.976 | ESS400084 | 200 | 200 | 20 | 60.056 |
| ESS400041 | 75 | 75 | 8 | 9.03 | ESS400085 | 200 | 200 | 22 | 71.168 |
| ESS400042 | 75 | 75 | 10 | 11.089 | Length = 6 - 12 meters SS400 or Q235 | ||||
| ESS400043 | 80 | 80 | 5 | 6.211 | |||||
| ESS400044 | 80 | 80 | 6 | 7.376 | |||||
JIS SS400 unequal angle steel size:
| Item no. | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) | Item no. | Leg 1 (mm) | Leg 2 (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|---|---|---|
| UESS400001 | 30 | 20 | 3 | 1.14 | UESS400045 | 100 | 50 | 6 | 6.98 |
| UESS400002 | 30 | 20 | 4 | 1.49 | UESS400046 | 100 | 50 | 8 | 9.16 |
| UESS400003 | 40 | 20 | 3 | 1.38 | UESS400047 | 100 | 50 | 10 | 11.3 |
| UESS400004 | 40 | 20 | 3 | 1.8 | UESS400048 | 100 | 65 | 7 | 8.96 |
| UESS400005 | 40 | 25 | 4 | 1.97 | UESS400049 | 100 | 65 | 8 | 10.2 |
| UESS400006 | 45 | 30 | 4 | 2.3 | UESS400050 | 100 | 65 | 9 | 11.3 |
| UESS400007 | 45 | 30 | 5 | 2.82 | UESS400051 | 100 | 65 | 10 | 12.5 |
| UESS400008 | 50 | 30 | 5 | 3.02 | UESS400052 | 100 | 75 | 7 | 9.52 |
| UESS400009 | 50 | 30 | 6 | 3.58 | UESS400053 | 100 | 75 | 8 | 10.8 |
| UESS400010 | 50 | 40 | 4 | 2.77 | UESS400054 | 100 | 75 | 9 | 12.1 |
| UESS400011 | 50 | 40 | 5 | 3.42 | UESS400055 | 100 | 75 | 10 | 13.3 |
| UESS400012 | 50 | 40 | 6 | 4.03 | UESS400056 | 100 | 75 | 11 | 14.6 |
| UESS400013 | 60 | 30 | 5 | 3.43 | UESS400057 | 100 | 75 | 12 | 15.8 |
| UESS400014 | 60 | 30 | 6 | 4.06 | UESS400058 | 120 | 80 | 8 | 12.4 |
| UESS400015 | 60 | 30 | 7 | 4.68 | UESS400059 | 120 | 80 | 10 | 15.3 |
| UESS400016 | 60 | 40 | 5 | 3.83 | UESS400060 | 120 | 80 | 12 | 18.2 |
| UESS400017 | 60 | 40 | 6 | 4.54 | UESS400061 | 130 | 65 | 8 | 12.1 |
| UESS400018 | 60 | 40 | 7 | 5.24 | UESS400062 | 130 | 65 | 10 | 14.9 |
| UESS400019 | 65 | 50 | 5 | 4.43 | UESS400063 | 130 | 65 | 12 | 17.7 |
| UESS400020 | 65 | 50 | 6 | 5.26 | UESS400064 | 130 | 75 | 8 | 12.7 |
| UESS400021 | 65 | 50 | 7 | 6.08 | UESS400065 | 130 | 75 | 10 | 15.7 |
| UESS400022 | 65 | 50 | 8 | 6.88 | UESS400066 | 130 | 75 | 12 | 18.6 |
| UESS400023 | 75 | 50 | 5 | 4.83 | UESS400067 | 130 | 90 | 10 | 17 |
| UESS400024 | 75 | 50 | 6 | 5.75 | UESS400068 | 130 | 90 | 12 | 20.1 |
| UESS400025 | 75 | 50 | 7 | 6.65 | UESS400069 | 150 | 75 | 9 | 15.7 |
| UESS400026 | 75 | 50 | 8 | 7.53 | UESS400070 | 150 | 75 | 10 | 17.4 |
| UESS400027 | 75 | 50 | 9 | 8.4 | UESS400071 | 150 | 75 | 11 | 18.9 |
| UESS400028 | 75 | 55 | 5 | 5.04 | UESS400072 | 150 | 75 | 12 | 20.6 |
| UESS400029 | 75 | 55 | 7 | 6.93 | UESS400073 | 150 | 90 | 10 | 18.6 |
| UESS400030 | 75 | 65 | 6 | 6.49 | UESS400074 | 150 | 90 | 12 | 22 |
| UESS400031 | 75 | 65 | 8 | 8.48 | UESS400075 | 150 | 90 | 15 | 27.1 |
| UESS400032 | 75 | 65 | 10 | 10.5 | UESS400076 | 150 | 100 | 10 | 19.3 |
| UESS400033 | 80 | 40 | 6 | 5.51 | UESS400077 | 150 | 100 | 12 | 23 |
| UESS400034 | 80 | 40 | 8 | 7.21 | UESS400078 | 150 | 100 | 14 | 26.6 |
| UESS400035 | 80 | 60 | 6 | 6.49 | UESS400079 | 160 | 80 | 10 | 18.5 |
| UESS400036 | 80 | 60 | 7 | 7.5 | UESS400080 | 160 | 80 | 12 | 22 |
| UESS400037 | 80 | 60 | 8 | 8.48 | UESS400081 | 160 | 80 | 14 | 25.4 |
| UESS400038 | 80 | 65 | 6 | 6.73 | UESS400082 | 200 | 100 | 10 | 23.4 |
| UESS400039 | 80 | 65 | 8 | 8.82 | UESS400083 | 200 | 100 | 12 | 27.8 |
| UESS400040 | 80 | 65 | 10 | 10.9 | UESS400084 | 200 | 100 | 15 | 34.4 |
| UESS400041 | 90 | 65 | 6 | 7.22 | UESS400085 | 250 | 90 | 10 | 26.6 |
| UESS400042 | 90 | 65 | 7 | 8.32 | Material: JIS SS400 Length = 6 - 12 meters | ||||
| UESS400043 | 90 | 65 | 8 | 9.44 | |||||
| UESS400044 | 90 | 65 | 10 | 11.7 | |||||
Q1: What is SS400 angle steel?
A: SS400 angle steel is a Japanese standard hot-rolled structural steel (JIS G3101) formed into L-shaped angles. It is widely used in construction, machinery, and general engineering due to its good strength, weldability, and versatility.
Q2: What sizes and forms are available?
A: SS400 angle steel comes in various leg lengths and thicknesses, commonly ranging from 25×25 mm to 200×200 mm with thicknesses from 3 mm to 20 mm. Standard lengths are typically 6–12 meters, and custom cutting can also be provided.
Q3: What are the mechanical properties of SS400 angle steel?
A: It has a tensile strength of 400–510 MPa, yield strength ≥245 MPa, and elongation ≥20%, making it suitable for light to medium structural applications.
Q4: Can SS400 angle steel be welded and fabricated?
A: Yes, it has good weldability and can be cut, drilled, or machined easily. Common welding methods include arc welding, MIG, and TIG welding.
Q5: Where is SS400 angle steel commonly used?
A: It is used in structural frameworks, support structures, bridges, machinery frames, shelving, and other engineering projects that require strong, reliable angle sections.