JIS G3101 General Structure Hot Rolled SS400 Steel

JIS G3101 SS400 JIS G3101 SS400 steel plate/sheet, under JISG3101 standard, we can regard SS400 steel plate/sheet for general purpose structural steel.

JIS G3101 SS400 is a technical delivery conditions for general purpose structural steel, and a type of steel sheet under JIS standard which is used to build ship, bridge, belongs to high strength sheet.

What is SS400 Steels?

SS400 steel is a structural hot Rolled steel in the form of plates, sheets & strips for general structural applications. SS400 is a material grade and designation defined in JIS G 3101 standard. JIS G 3101 is a Japanese material standard for hot Rolled steel plates, sheets, strips for general structural usage.

The structural quality hot rolled SS400 steel is more reliable in its tensile strength than SS330 steel. Dimensional Characteristics of SS400 Steels: The applicable thickness for this SS400 material as defined in the JIS 3101 starts from 6 mm to 120 mm.

The Chemical Composition of SS400 Steels as under:

Carbon (C) is not identified in the standard. Manganese (Mn) is not identified in the standard.

Maximum percentage of Phosphorous (P) is 0.050 percent.

Maximum percentage of Sulphur (S) is 0.050 percent. Remaining is iron (Fe) percentage and with few negligible impurities.

JIS G 3101 SS400 Steel Mechanical Properties :

Density: 7860kg/m3

Young’s Modulus: 190-210GPa

Tensile Strength: 400 – 510 MPa

Yield Strength: 205-245 MPa

Poisson’s ratio: 0.26

Hardness Brinell Hardness: 160HB

The tensile strength of the SS400 Steels is expressed in Newton per millimeters and it must be at-least 400 N/mm2 (MPa) and maximum can be 510 N/mm2 (MPa).

The yield strength is minimum 205 to minimum 245 N/mm2 (MPa) depending on the thickness.

The yield strength for thickness below 16 mm is minimum 245 N/mm2 (MPa) whereas for higher gauges above 100 mm is minimum 205 N/mm2 (MPa).

The elongation property of SS400 steel varies with the ranges of thickness.  The minimum percentage ranges for elongation is 17% thicknesses till 16 mm, 21% for thicknesses till 40 mm, and 23% greater than 50 mm.

SPHC steel comparison with this grade of SS400 material will show how general structure hot rolled steel differs with commercial quality SPHC steel in chemical composition & mechanical properties.

Applications of this kind of steel are in making structural tubes, pipes, rods, and various structural sectional steels.

JIS G3101 SS400 is equivalent to DIN:St37-2,EN SS400,ASTM:A283C and UNI:FE360B. Equivalent grade : SS400 steel plate/sheet is in JIS G3101 standard. The equal material of SS400 is: BS 4360 40(A)B, CSAG40-21 230 G, IS IS 226, JIS 3106 SM 400 A – ISO 630 Fe 360 B, ASTM A 36/A 283 C.

JIS G3101 SS400	Comparision of steel grades
	BS 4360	40(A)B
	CSAG40-21	230 G
	IS	IS 226
	JIS 3106	SM 400 A
	ISO 630	Fe 360 B
	ASTM	A 36/A 283 C

JIS G3101 SS400 steel Mechanical Properties JIS G3101 SS400 steel plate/sheet for carbon steels, This kind of steel has very wide use. Because of the low Carbon content and without alloy element, carbon structural steel has the proper tensile strength, good toughness, plasticity,processing property. More detailed information about JIS G3101 SS400 steel Mechanical Properties , please refer to the following table:

Grade	Yield Strength(Mpa)		Tensile Strength(Mpa)	Elongation min.(%)
JIS G3101 SS400	Thickness			Thickness
	＜16 mm	≥16mm		＜5mm	5-16mm	≥16mm
	245	235	400-510	21	17	21