JIS G3101 SS400 Steel Equivalent Material Properties Specification Composition Density Strength

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JIS G3101 SS400 Steel

SS400 steel is the most commonly used hot-rolled structural steel (formerly known as SS41) in Japan, and is called general structural rolled steel in JIS G3101. SS400 material is cheap and versatile, and plays an important role in construction, bridges, civil engineering and mechanical equipment structures. Its appearance includes round steel, flat steel (flat steel), steel plates, steel strips and profiles.

Material SS400 Meaning

SS400 Steel meaning: SS is the abbreviation of Steel Structure, 400 means that the tensile strength is ≥ 400 MPa.

SS41 Meaning: 41 means that the tensile strength is 41kgf/mm2 or higher.

Datasheet and Specification

The following table shows the SS400 material specification and datasheet, including chemical composition, mechanical properties, physical properties and equivalent, etc.

Chemical Composition

The following table shows JIS SS400 steel chemical composition, please note that the carbon (C) content is not specified in JIS G3101, only the phosphorus (P) and sulfur (S) content.

Chemical Composition, %
Country (Region) Standard Steel Grade C Mn P, ≤ S, ≤
Japan JIS G3101 SS400 0.05 0.05

Note: If necessary, alloy elements not listed in this table can be added.

Physical Properties

The following table shows JIS SS400 material properties, including density and specific gravity, melting point, specific heat capacity, electrical resistivity, elastic modulus, thermal conductivity, linear expansion coefficient, Young’s modulus, magnetic permeability, etc.

Notes:

  • 10-6·K-1 = 10-6/K
  • 1 Ω·mm²/m = 1 μΩ·m
  • 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
  • 1 GPa = 1 kN/mm2
  • 1 MPa = 1 N/mm2
Density and specific gravity, g/cm3 7.85
melting point, ℃ 1494-1527
Specific heat capacity, J/(Kg·K) 473 at 20 ℃
Electrical resistivity, μΩ·m About 0,15 (20 ℃)
Long. elastic modulus, GPa 206
Tr. modulus of elasticity, GPa 79
Shear modulus, GPa 79
Thermal conductivity, (W/m·K) 57-60
Linear expansion coefficient, (10-6/K) 11.3-11.6 (20 ℃)
Young’s modulus, GPa 206
Poisson’s ratio 0.3
Magnetic permeability, mm2/s 13.9

Mechanical Properties

The following table shows SS400 material mechanical properties, such as yield point or yield strength (yield stress), tensile strength and elongation.

Standard Steel Yield strength (≥, MPa); Steel thickness (t) in mm. Tensile Strength (MPa) Steel thickness (t) in mm. Test piece Elongation (≥, %) Bendability
t≤16 16<t≤40 40<t≤100 >100 Bending angle Inter radius Test piece
JIS G3101 SS400 245 235 215 205 400-510 plates and sheets, steel strip in coils, flats and sections, t≤5 No. 5 21 180° 1/2 thickness No. 1
plates and sheets, steel strip in coils, flats and sections, 5<t≤16 NO. 1A 17
plates and sheets, steel strip in coils, flats and sections, 16<t≤50 NO. 1A 21
plates and sheets, steel strip in coils, flats and sections, t>40 No. 4 23
side or distance across flats of steel bars ≤25 No. 2 20 180° 1.5 x diameter, side, or distance across flats No. 2
side or distance across flats of steel bars >25 No. 14A 22

Standard Thickness

Note: The thickness in brackets is not recommended.

SS400 Steel Plate Thickness in mm.
1.2 1.4 1.6 1.8 2.0 2.3 2.5 (2.6) 2.8
(2.9) 3.2 3.6 4.0 4.5 5.0 5.6 6.0 6.3
7.0 8.0 9.0 10.0 11.0 12.0 12.7 13.0 14.0
15.0 16.0 (17.0) 18.0 19.0 20.0 22.0 25.0 25.4
28.0 (30.0) 32.0 36.0 38.0 40.0 45.0 50.0

Thickness Tolerance

The following table summarizes JIS SS400 steel thickness tolerances. With the consent of the delivery party, you can limit the tolerance of this table to positive or negative. However, the total tolerance must be equal to the total tolerance range in the table.

Notes:

  • If the thickness is 40 mm or more, the positive side tolerance can be relaxed through mutual negotiation.
  • The thickness of more than 350 mm should be agreed by both parties.
  • The width and thickness tolerance of 5000 mm depends on the agreement between the two parties.
Steel thickness tolerances in mm
Thickness (t) Plate Width (W)<1600 1600≤W<2000 2000≤W<2300
t<1.25 ±0.16
1.25≤t<1.60 ±0.18
1.60≤t<2.00 ±0.19 ±0.23
2.00≤t<2.50 ±0.20 ±0.25
2.50≤t<3.15 ±0.22 ±0.29 ±0.29
3.15≤t<4.00 ±0.24 ±0.34 ±0.34
Material thickness tolerance in mm
Thickness (t) Steel Plate width (W)<1600 1600≤ W <2000 2000≤ W <2500 2500≤ W <3150 3150≤ W <4000 4000≤ W <5000
4.00≤t<5.00 ±0.45 ±0.55 ±0.55 ±0.65
5.00≤t<6.30 ±0.50 ±0.60 ±0.60 ±0.75 ±0.75 ±0.85
6.30≤t<10.00 ±0.55 ±0.65 ±0.65 ±0.80 ±0.80 ±0.90
10.00≤t<16.00 ±0.55 ±0.65 ±0.65 ±0.80 ±0.80 ±1.00
16.00≤t<25.00 ±0.65 ±0.75 ±0.75 ±0.95 ±0.95 ±1.10
25.00≤t<40.00 ±0.70 ±0.80 ±0.80 ±1.00 ±1.00 ±1.20
40.00≤t<63.00 ±0.80 ±0.95 ±0.95 ±1.10 ±1.10 ±1.30
63.00≤t<100.00 ±0.90 ±1.10 ±1.10 ±1.30 ±1.30 ±1.50
100.00≤t<160.00 ±1.30 ±1.50 ±1.50 ±1.70 ±1.70 ±1.90
160.00≤t<200.00 ±1.60 ±1.80 ±1.80 ±1.90 ±1.90 ±2.10
200.00≤t<250.00 ±1.80 ±1.90 ±1.90 ±2.00 ±2.00 ±2.20
250.00≤t<300.00 ±2.00 ±2.10 ±2.10 ±2.20 ±2.20 ±2.50
300.00≤t≤350.00 ±2.10 ±2.30 ±2.30 ±2.40 ±2.40 ±2.80

Standard Steel Plate Width

Standard width of steel plate and steel belt (mm)
600 630 670 710 750 800 850 900 914 950
1000 1060 1100 1120 1180 1200 1219 1250 1300 1320
1400 1500 1524 1600 1700 1800 1829 1900 2000 2100
2134 2438 2500 2600 2800 3000 3048

Standard Length of Steel Plate

Standard length of steel plate (mm)
1829 6096 9144
2438 7000 10000
3048 8000 12000
6000 9000 12192

Material SS400 Equivalent Grades

The following table shows JIS SS400 steel equivalent materials, including the European EN standard (UK BSI, German DIN), American ASTM standard, international ISO standard, Chinese GB standard, Indian standard. (for reference only)

SS400 Equivalent Steel Grade
Japan US European Union ISO China Canada India
Standard Steel Standard Grade Standard Steel Standard Grade Standard Steel Standard Grade (SI) Standard Grade
JIS G3101 SS400 ASTM A36 A36 steel EN 10025-2 S235 (S235JR) ISO 630 S235 GB/T 700 Q235 CSA G40.21 44W (300W) IS 2062 E250

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1 Comment
  1. Zoom says

    Hi I’m looking for SS400 1220mm*2mm let me know the price for 200 ton

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