Physical Properties
I. Tensile Stress, Nominal Diameter & Cross Sectional Area

Bar	Size	Cross Sectional Area		Nominal	Dia.	Tensile	Strength	Modulus of	Elasticity
mm	inches	mm2	in2	mm2	in2	MPa	ksi	GPa	psi 106
6	#2	33.23	0.0515	6.35	0.25	825	120	40.8	5.92
9	#3	84.32	0.131	9.53	0.375	760	110	40.8	5.92
12	#4	144.85	0.224	12.7	0.5	690	100	40.8	5.92
16	#5	217.56	0.337	15.88	0.625	655	95	40.8	5.92
19	#6	295.50	0.458	19.05	0.75	620	90	40.8	5.92
22	#7	382.73	0.593	22.23	0.875	586	85	40.8	5.92
25	#8	537.90	0.834	25.4	1	550	80	40.8	5.92
32	#10	807.34	1.251	31.75	1.25	517	75	40.8	5.92

Hughes Brothers reserves the right to make improvements in the product and/or process which 
may result in benefits or changes to some physical-mechanical characteristics. The data contained 
herin is considered representative of current production and is believed to be reliable and to represent 
the best available characterization of the product as of January, 2000.

Cross Sectional Area
The cross sectional area of the rebar may be determined by immersing a sample in water and measuring the volume displacement of the piece. Cross sectional area may also be calculated using the nominal diameter. When calculating the cross sectional area, the cross section is assumed to be a circle.

Nominal Diameter
The nominal diameter of the rebar is the average diameter and assumes the shape of the rebar is a circle.

Tensile Strength
Tensile strength values shown are determined as the average failure load divided by the cross sectional area based on nominal bar diameter. Tensile stress varies as diameter increases due to shear lag which develops between the fibers in the larger sizes.

Modulus of Elasticity
The variation in the Modulus of Elasticity of different diameter bars is much smaller than that of the tensile strength.

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