Grade Comparison Table for Hot Rolled Carbon Steel Sheet

Hot Rolled sheet is a kind of steel in the shape of a flat plate rolled at high temperature, with rough surface, good plasticity and high strength characteristics is the basic steel for cold rolled steel and coated steel. According to the use of hot rolled plate can be divided into ordinary carbon steel hot rolled plate (for structural components, building components, etc.), alloy steel hot rolled plate (add alloy elements such as chromium, nickel, molybdenum, etc.), weathering steel plate (outdoor steel structure). The grades are Q235, S235JR, S235JR, ASTM A36, SS400, and so on.

Chinese standards (GB/T 3274, GB/T 700)

Grade	Type	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Typical Applications
Q235	Ordinary Carbon Structural Steel	370-500	≥235	≥26	Building structures, bridges, machine frames
Q355	Low Alloy High Strength Steel	470-630	≥355	≥22	Heavy machinery, pressure vessels
SPHC	General Purpose Hot Rolled Sheet	270-410	≥175	≥34	Cold-rolled substrates, simple formed parts
SPHT1	Stamping Hot Rolled Sheet	270-370	≥175	≥38	Car wheels, deep-drawn parts

European Standard (EN 10025-2)

Grade	Type	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Applicable Scenarios
S235JR	Non-Alloy Structural Steel	360-510	≥235	≥26	General structural components, welded frames
S355JR	Low Alloy Structural Steel	470-630	≥355	≥22	Heavy engineering, bridges
DD11	Cold Forming Hot Rolled Steel	270-410	≥170	≥34	Cold-rolled substrates, simple stamping
DD14	Deep Drawing Hot Rolled Steel	270-370	≥170	≥38	Car chassis, complex formed parts

American Standard (ASTM A36/A1011)

Grade	Type	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Characteristics
ASTM A36	Structural Steel	400-550	≥250	≥20	General construction, bridges, machinery
ASTM A1011 CS	Commercial Grade Hot Rolled Steel	310-440	≥170	≥30	Cold-rolled substrates, simple forming
ASTM A1011 DS	Deep Drawing Hot Rolled Steel	280-380	≥170	≥35	Automotive parts, container manufacturing
ASTM A572 Gr50	High Strength Low Alloy Steel	450-550	≥345	≥18	Heavy structures, crane arms

Japanese Standard (JIS G 3101/JIS G 3131)

Grade	Type	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Typical Applications
SS400	General Structural Steel	400-510	≥245	≥21	Building frames, general machinery
SPHC	Cold-Rolled Substrate	270-410	≥175	≥34	Cold-rolled material, simple stamping parts
SPHT1	Hot-Rolled Steel for Stamping	270-370	≥175	≥38	Automotive parts, deep-drawing containers
SM490	Welding Structural Steel	490-610	≥325	≥19	Bridges, ships, pressure vessels

Korean Standard (KS D 3515/KS D 3503)

Grade	Type	Equivalent Standard	Tensile Strength (MPa)	Typical Applications
SS400	Structural Steel	Similar to JIS SS400	400-510	Construction, general machinery
SPHC	Cold-Rolled Substrate	Similar to JIS SPHC	270-410	Cold-rolled material, simple forming
SM490	Welding Structural Steel	Similar to JIS SM490	490-610	Heavy equipment, ship structures

International Grade Comparison Table (Simplified)

China (GB)	Europe (EN)	USA (ASTM)	Japan (JIS)	Korea (KS)
Q235	S235JR	ASTM A36	SS400	SS400
Q355	S355JR	ASTM A572 Gr50	SM490	SM490
SPHC	DD11	ASTM A1011 CS	SPHC	SPHC
SPHT1	DD14	ASTM A1011 DS	SPHT1	SPHT1

Chemical Composition Comparison (Typical Values)

Grade	C (Carbon)	Mn (Manganese)	S (Sulfur)	P (Phosphorus)	Si (Silicon)
Q235	≤0.22%	0.30-0.65%	≤0.045%	≤0.045%	≤0.35%
S235JR	≤0.17%	≤1.40%	≤0.035%	≤0.035%	≤0.35%
ASTM A36	≤0.26%	0.60-0.90%	≤0.050%	≤0.040%	0.15-0.40%
SS400	≤0.23%	≤1.65%	≤0.050%	≤0.050%	≤0.55%

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