A36 Round Steel Bar

A36 is a low-carbon steel containing manganese, phosphorus, sulfur, silicon and copper. A36 has good weldability and high yield strength. A36 carbon steel bar is commonly used as a variety of structural steel parts.

Carbon Steel: Properties, Production, Examples and Applications

Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.

Types of carbon steel and their properties

Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:

Carbon content (wt.%)	Microstructure	Properties	Examples
Low-carbon steel	< 0.25	Ferrite, pearlite	Low hardness and cost. High ductility, toughness, machinability and weldability	AISI 304, ASTM A815, AISI 316L
Medium-carbon steel	0.25 – 0.60	Martensite	Low hardenability, medium strength, ductility and toughness	AISI 409, ASTM A29, SCM435
High-carbon steel	0.60 – 1.25	Pearlite	High hardness, strength, low ductility	AISI 440C, EN 10088-3

Carbon Steel Description

Grade:

1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E

2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q

3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80

4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE

PRODUCT DETAILS

A36
Round Steel Bar Description

A36 is
a carbon structural steel whose chemical composition and mechanical
properties strictly conform to American ASTM standards. A36 steel bar mainly consists of iron, carbon,
silicon, manganese, phosphorus, sulfur and other elements. Iron constitutes more than 99% of the entire chemical composition. Its carbon content proportion is relatively
high, around 0.2%,
ensuring that the steel has a certain hardness and toughness. The addition of
silicon, manganese and other elements enhances the strength and toughness of
steel. Phosphorus
and sulfur are low so that the steel bar has
good welding performance and corrosion resistance. A36 steel bar is used for
welded, bolted or riveted construction of bridges and buildings, as well as
for general structural purposes. Due to its lowest yield point, A36 can be
used to design lighter-weight structures and equipment, and provide good
weldability.

Product Parameters
Product Name	A36 Round Steel Bar
Standard	EN/DIN/JIS/ASTM/BS/ASME/AISI, etc.
Common Round Bar Specifications	3.0-50.8 mm, Over 50.8-300mm
Flat Steel Common Specifications	6.35×12.7mm, 6.35×25.4mm, 12.7×25.4mm
Hexagon Bar Common Specifications	AF5.8mm-17mm
Square Bar Common Specifications	AF2mm-14mm, AF6.35mm, 9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm
Length	1-6meters, Size Accept Custom
Diameter(mm)	Hot Rolling Round Bar	25-600	Cold Rolling Square Bar	6-50.8
	Hot Rolling Square Bar	21-54	Cold Rolling Hexagon Bar	9.5-65
	Cold Rolling Round bar	6-101.6	Forged Rebar	200-1000
Surface Process	Bright, Polished, Black
Other Services	Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

Chemical Composition
C	Cu	Fe	Mn	P	Si	S
0.25～0.290	0.2	98	1.03	0.04	0.28	0.05

Physical Performance
Physical Performance	Metric	Imperial
Density	7.85 g/cm3	0.284 lb/in3

Scope of
Application

Bolted,
riveted or welded structures for bridges, buildings and oil drilling rigs.

Used
for forming storage tanks, silos, bearing plates, fixtures, rings, templates,
fixtures, sprockets, cams, gears, bottom plates, forgings, decoration
engineering, piles, brackets, automobiles and agricultural equipment, frames,
mechanical parts, etc.

Equivalent Material
National Standard GB	European Standard EN	American Standard ASTM	German Standard DIN,WNr	Japanese Standard JIS	French Standard AFNOR	British Standard BS	Canada HG
Q235B	S235JR	A283C	St37-2	SM400A	E24-2	40A/40B	230G
Italy UNI	India IS	Switzerland SS	Australia ONORM	Norway NS	Spain UNE	International Standards ISO	Portugal NP
Fe360B	IS2062	1311/1312	RSt360B	NS12123	AE235B-FN	E235B/Fe360B	FE360-B