Round Bars

CSA G40.21 Gr.50W

Round bars compliant with CSA G40.21 Grade 50W are engineered for superior performance in structural applications, leveraging their high-strength, low-alloy composition to meet the stringent requirements of the Canadian Standards Association. This grade is characterized by its exceptional yield strength of 50 ksi, making it an ideal choice for projects demanding durability and resistance without the need for heat treatment. The precise chemical composition of Grade 50W ensures its suitability for use in a variety of environments, providing a reliable foundation for bridges, buildings, and infrastructure projects. This material’s adaptability and robustness make it a preferred option for engineers and architects who require materials that can withstand the rigors of construction while maintaining structural integrity over time. CSA G40.21 Grade 50W round bars epitomize the advancements in steel anchors, offering an optimal balance of strength, flexibility, and reliability for demanding structural applications.

50W or 350W?

In this CSA standard, measurements are expressed in SI (metric) units, with Anglo-Saxon (Imperial) values shown in brackets. Depending of the unit used, it is either known as 50W or 350W. This is the same steel expressed in different units

In metric (SI) units, this grade of steel is known as 350W.
In imperial units, we know it as 50W.

CSA G40.21 Gr.50W Specifications

Available diameters: From 1/8 to 8 inches.

Default lengths: This material is generally supplied in 240-inch (20-foot) lengths. However, we can also manufacture custom lengths for your projects.

Please check with our account managers for availability and/or feasibility.

CSA G40.21 Grade 50W chemical & mechanical requirements are ruled by ASTM A6.

Specified Size, in.	Permitted Variations from specified Size, in.		Permitted Out-of-Round, in.
	Over	Under
To 5/16	0.005	0.005	0.008
Over 5/16 to 7/16, incl	0.006	0.006	0.009
Over 7/16 to 5/8, incl	0.007	0.007	0.01
Over 5/8 to 7/8, incl	0.008	0.008	0.012
Over 7/8 to 1, incl	0.009	0.009	0.013
Over 1 to 1-1/8, incl	0.01	0.01	0.015
Over 1-1/8 to 1-1/4, incl	0.011	0.011	0.016
Over 1-1/4 to 1-3/8, incl	0.012	0.012	0.018
Over 1-3/8 to 1-1/2, incl	0.014	0.014	0.021
Over 1-1/2 to 2, incl	1/64	1/64	0.023
Over 2 to 2-1/2, incl	1/32	0	0.023
Over 2-1/2 to 3-1/2, incl	3/64	0	0.035
Over 3-1/2 to 4-1/2, incl	1/16	0	0.046
Over 4-1/2 to 5-1/2, incl	5/64	0	0.058
Over 5-1/2 to 6-1/2, incl	1/8	0	0.07
Over 6-1/2 to 8-1/4, incl	5/32	0	0.085
Over 8-1/4 to 9-1/2, incl	3/16	0	0.1
Over 9-1/2 to 10, incl	1/4	0	0.12

This table is inspired by ASTM A6 table 27 (This standard regulate multiple other ones about dimensionals such as CSA G40.21 Grade 50W).

^A: Out-of-round is the difference between the maximum and minimum diameters of the bar, measured at the same transverse cross section. Out-of-square section is the
difference in perpendicular distance between opposite faces, measured at the same transverse cross section.

The CSA G40.21 Grade 50W standard does not specify particular requirements for coating or finishing, leaving flexibility for different applications and preferences.

At Boulons Plus, we understand the importance of meeting diverse project needs and offer our clients the choice between bare steel and hot-dip galvanized finishes in compliance with ASTM F2329.

This option ensures that our clients can select the most suitable protection against corrosion and environmental wear for their specific application, ensuring longevity and durability in their projects.

Chemical composition requirements for CSA G40.21 Gr.50W
Chemical Elements	Heat Analysis %
Carbon	0.23
Manganese	0.50-1.50
Phosphorus	0.04 max
Sulfur	0.05
Silicon^(a)(b)	0.40 max
Chromium	***
Nickel	***
Copper^d	***

This table is inspired by CSA G40.21 Table 3.

(a) A silicon content of 0.15 to 0.40% is required for Type W steel over 40 mm (1-1/2 in) in thickness or bar diameter, except as modified by Item (b).
(b) At the purchaser’s request or at the producer’s discretion, the steel may be made with no minimum silicon content, provided that the steel contains a minimum of 0.015% acid soluble aluminum or 0.020% total aluminum content.
(c) Aluminum may be used as a grain refining element without prior approval by the purchaser and, when so used, shall not be included in the summation of grain refining elements included in Table 3. The elements columbium (also known as niobium) and vanadium may be used singly or in combination up to the total percentage indicated, except where columbium is used singly or in combination with vanadium in plates thicker than 14 mm (1/2 in) or in shapes heavier than Group 1, in which case the silicon content shall be 0.15% minimum. This restriction does not apply if the steel fulfills the requirements of Item (b).
(d) A minimum copper content of 0.20% may be specified by the purchaser on all grades.
(e) For thicknesses over 100 mm (4 in), the carbon maximum shall be 0.22%.
(f) For thicknesses over 100 mm (4 in), the carbon maximum shall be 0.23%.
(g) With the prior agreement of the purchaser, the manganese content may be increased, provided that the sum of the carbon content plus 1/6 of the manganese content does not exceed 0.40% for Grade 350WT (50WT) or 0.42% for Grades 400WT (60WT), 450WT (65WT), 480WT (70WT), 550W (80W), 550WT (80WT), 550A (80A), and 550AT (80AT).
(h) See Clauses 5.3 and 5.4.
(i) Types WT, A, AT, Q, and QT steel shall be supplied using a fine grain practice.
(j) The combined contents of chromium, nickel, and copper shall be not less than 1.00%.
(k) The manganese content may be increased to 1.60% maximum, provided that the sum of the carbon content plus 1/6 of the manganese content does not exceed 0.43%.
(l) The combined total of the chromium and nickel contents shall be not less than 0.40%.
Notes:
(1) In order to meet the required mechanical properties, the manufacturer may use additional alloying elements with the prior approval of the purchaser.
(2) The usual deoxidation practice is fully killed.

Mechanical properties of bars & plates

Grade, Imperial Tensile strength, Ksi Yield strength, ksi, minimum Elongation*†, % minimum

Longitudinal Transverse‡

≤ 2 1/2 in > 2 1/2 in ≤ 4 in > 4 in ≤ 6 in > 6 in ≤ 8 in In 8 in In 2 in In 8 in In 2 in

50W 65–95§ 50 46 46 46 19 22 17 20

This table is inspired by CSA G40.21 Table 6

* Per cent elongation is not specified or required for rolled floor plate.
† Where per cent elongation in both 8 in and 2 in is specified, only one gauge length needs to be determined and reported.
‡ Transverse values apply only to plate wider than 24 in.
§ Plates for API applications shall have an upper limit of tensile strength 20 ksi above the specified minimum.
** Available in angles and bars only.
†† The maximum yield strength is 65 ksi and the maximum yield to tensile strength ratio is 0.85. For structural shapes that are required to be tested from the web location, a maximum yield strength of 70 ksi and a maximum yield to tensile strength ratio of 0.87 is permitted.

Notes:
(1) For material having a thickness less than 0.312 in, see Clause 8.3.1.1 of CSA G40.20. For material having a thickness greater than 3.5 in, see Clause 8.3.1.2 of CSA G40.20.
(2) The yield strength may be measured by 0.5% extension-under-load or 0.2% offset method.

Mechanical properties of bars & plates
Grade, Imperial	Tensile strength, Ksi	Yield strength, ksi, minimum	*Elongation†, % minimum**
Longitudinal	Transverse‡
≤ 2 1/2 in	> 2 1/2 in ≤ 4 in	> 4 in ≤ 6 in	> 6 in ≤ 8 in	In 8 in	In 2 in	In 8 in	In 2 in
50W	65–95§	50	46	46	46	19	22	17	20

ASTM F1554 Gr.55

Round bars under the ASTM F1554 Grade 55 standard are recognized for their reliability, boasting a minimum yield strength of 55,000 psi. Available in plain steel and Hot Dip galvanized coatings, these bars, ranging from 1/2 to 4 inches in nominal diameter, offer sturdy solutions for construction and structural applications. The Grade 55 designation indicates a specific level of strength and ductility suitable for anchor bolts, threaded rods, and other fastening elements. Whether in plain steel for general applications or Hot Dip galvanized for enhanced corrosion resistance, these rods ensure secure connections in diverse environments, making them well-suited for construction projects and infrastructure development.

AVAILABILITY.

Imperial units only

Min. yield strength of 55,000 psi.

From 1/2 to 4 In diameter by 240 or 288 In long

Plain / HDG F2329.

Custom lengths on demand using our manufacturing plant.

Download Spec Sheet

ASTM F1554 Gr.55 Specifications

Infos
Properties

Dimensionals
Coatings
Product Marking

Diameter Availability: From 1/4 to 4 inches in diameter.
Thread Classes: This grade’s thread classes are of 2A class by default. (11.1.1: When an anchor bolt class is not specified, Class 2A shall be furnished.)
Default Lengths: This material is generally supplied in 240 inches (20 feet) and 288 inches (24 feet) lengths.
There is currently no coating reference table in ASTM F1554-20. However, section 7 give some details about coating:
7. Protective Coatings
7.1 Zinc, Hot Dip or Mechanically Deposited:
7.1.1 When zinc-coated anchor bolts are required, the purchaser shall specify the coating process, for example, hot dip, mechanically deposited, or no preference. When no preference is specified, the supplier may furnish bolts coated with either process. The supplier’s option is limited to one process per item, with no mixed processes in a lot.
7.1.2 When hot-dip zinc coated anchor bolts are specified, the anchor bolts and nuts shall be zinc-coated in accordance with the requirements of Specification F2329/F2329M.
7.1.3 When mechanically deposited zinc coated anchor bolts are provided, the anchor bolts and nuts shall be zinccoated in accordance with the requirements of Specification B695, Class 55.
7.1.4 Unless otherwise specified, when zinc-coated washers are required, the washers shall be hot-dip zinc-coated in accordance with Specification F2329/F2329M, or mechanically deposited zinc coated in accordance with Specification B695, Class 55. The coating process for the washers need not be the same as that for the anchor bolts and nuts.
7.2 Other Coatings:
7.2.1 When indicated on the inquiry and purchase order, coatings other than those in 7.1 shall be as agreed upon by the purchaser and supplier.

ASTM F1554 Product Marking

Grade Color

36 Blue

55 Yellow

55 (Weldable^A) Yellow (projecting end) & White (encased end)

105 Red

This table is inspired from ASTM F1554-20 Section 18 (Product Marking)

^A: See S1

^S1. Weldable Grade 55 Bars and Anchor Bolts

^S1.1 The material described in this section is intended for welding. This supplemental section, by chemical composition restrictions and by a carbon equivalent formula, helps to provide assurance of weldability.

^S1.2 Welding technique is of fundamental importance when bolts produced to this supplementary section are welded. See Note 2.

^S1.3 These supplementary requirements supersede conflicting provisions of the general specification.

^S1.4 Chemical Composition:

^S1.4.1 Steel shall conform to the following limitations: (See table S1.4.1 below)

^S1.4.2 Carbon Equivalent—In addition to the requirements specified in S1.4.1, the analysis shall provide a carbon equivalent (CE) meeting the following requirements:

^S1.4.2.1 For alloy or low-alloy steel, the carbon equivalent shall not exceed 0.45 % when calculated as follows: (See calculus S1.4.1 below)

^S1.4.2.2 For carbon steel, the carbon equivalent shall not exceed 0.40 % when calculated as follows: (See calculus S1.4.2.2 below)

^S1.5 Marking – See 18.1.

Calculus S1.4.2.1

Calculus S1.4.2.2

S.1.41 – Steel shall conform to the following limitations:

Chemical Elements Heat Analysis Product Analysis

Carbon, max, % 0.30 0.33

Manganese, max % 1.35 1.41

Phosphorus, max, % 0.040 0.048

Sulfur, max, % 0.050 0.058

Silicon, max, % 0.50 0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Chemical Properties
Mechanical Properties

Chemical Composition Requirements for ASTM F1554 Gr.55 & Gr.105

Chemical Elements Heat Analysis Product Analysis

Carbon, max, % *** ***

Manganese, max % *** ***

Phosphorus, max, % 0.04 0.048^†

Sulfur, max, % 0.05 0.058

Copper, min, % (When specified) 0.20 0.18

This table is inspired from ASTM F1554-20 Table 1

^†Editorially corrected in April 2016.

The table below only apply for Weldable Grade 55 Bars and Anchor Bolts as per supplementary Requirements S1.

S.1.41 – Steel shall conform to the following limitations:

Chemical Elements Heat Analysis Product Analysis

Carbon, max, % 0.30 0.33

Manganese, max % 1.35 1.41

Phosphorus, max, % 0.040 0.048

Sulfur, max, % 0.050 0.058

Silicon, max, % 0.50 0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Axial Tensile Properties for Full-Size Tests of F1554-20 Gr.55 Anchor Bolts

Nominal Diam. Stress Area, ^B, in.². Tensile Load, lbf Yield min, lbf

1/2 0.1419 10,600 – 13,500 7,800

5/8 0.226 17,000 – 21,500 12,400

3/4 0.334 25,000 – 31,700 18,400

7/8 0.462 34,600 – 43,900 25,400

1 0.606 45,400 – 57,600 33,300

1 1/8 0.763 57,200 – 72,500 42,000

1 1/4 0.969 72,700 – 92,100 53,300

1 1/2 1.405 105,000 – 133,000 77,300

1 3/4 1.90 142,000 – 180,000 104,500

2 2.50 188,000 – 238,000 138,000

2 1/4 3.25 244,000 – 309,000 179,000

2 1/2 4.00 300,000 – 380,000 220,000

2 3/4 4.93 370,000 – 468,000 271,000

3 5.97 448,000 – 567,000 328,000

3 1/4 7.10 532,000 – 674,000 390,000

3 1/2 8.33 625,000 – 791,000 458,000

3 3/4 9.66 724,000 – 918,000 531,000

4 11.08 831,000 – 1,053,000 609,000

This table is inspired by ASTM F1554-20 Table 2.

^B: Stress areas extracted from ASME B 1.1.

Tensile Properties for Bars and Machined Specimens for F1554 Gr.55

Tensile strength, KSI 75 – 95

Yield strength, min, ksi (0.2% offset) 55

Elongation in 8 in. , min, %^A 18

Elongation in 2 in. min, %^A 21

Reduction of Area, min, % 30

This table is inspired from ASTM F1554-20 Table 3

^A: Elongation in 8 in. applies to bars. Elongation in 2 in. applies to machined
specimens.

ASTM F1554 Gr.105

Round bars under the ASTM F1554 Grade 105 standard represent a high-strength and robust option, featuring a minimum yield strength of 105,000 psi. Available in plain steel and Hot Dip galvanized coatings, these bars, ranging from 1/2 to 4 inches in nominal diameter, provide exceptional performance for critical applications in construction and structural engineering. The Grade 105 designation signifies superior strength and durability, making these bars suitable for demanding applications where high tensile strength and resistance to stress are essential. Whether in plain steel for general use or Hot Dip galvanized for enhanced corrosion resistance, ASTM F1554 Grade 105 round bars offer reliable support for heavy-duty construction projects. Their significant strength and durability make them an excellent choice for structural components, reinforcement, and other applications requiring a high degree of mechanical robustness

AVAILABILITY.

Imperial units only

Min. yield strength of 105,000 psi.

From 1/2 to 4 In diameter by 240 or 288 In long

Plain / HDG F2329.

Custom lengths on demand using our manufacturing plant.

Download Spec Sheet

ASTM F1554 Gr.105 Specifications

Infos
Properties

Dimensionals
Coatings
Product Marking

Diameter Availability: From 1/4 to 4 inches in diameter.
Thread Classes: This grade’s thread classes are of 2A class by default. (11.1.1: When an anchor bolt class is not specified, Class 2A shall be furnished.)
Default Lengths: This material is generally supplied in 240 inches (20 feet) and 288 inches (24 feet) lengths. If required, we can also manufacture custom lengths for your projects.
Please validate availability or feasibility with our account managers.
There is currently no coating reference table in ASTM F1554-20. However, section 7 give some details about coating:
7. Protective Coatings
7.1 Zinc, Hot Dip or Mechanically Deposited:
7.1.1 When zinc-coated anchor bolts are required, the purchaser shall specify the coating process, for example, hot dip, mechanically deposited, or no preference. When no preference is specified, the supplier may furnish bolts coated with either process. The supplier’s option is limited to one process per item, with no mixed processes in a lot.
7.1.2 When hot-dip zinc coated anchor bolts are specified, the anchor bolts and nuts shall be zinc-coated in accordance with the requirements of Specification F2329/F2329M.
7.1.3 When mechanically deposited zinc coated anchor bolts are provided, the anchor bolts and nuts shall be zinccoated in accordance with the requirements of Specification B695, Class 55.
7.1.4 Unless otherwise specified, when zinc-coated washers are required, the washers shall be hot-dip zinc-coated in accordance with Specification F2329/F2329M, or mechanically deposited zinc coated in accordance with Specification B695, Class 55. The coating process for the washers need not be the same as that for the anchor bolts and nuts.
7.2 Other Coatings:
7.2.1 When indicated on the inquiry and purchase order, coatings other than those in 7.1 shall be as agreed upon by the purchaser and supplier.

ASTM F1554 Product Marking

Grade Color

36 Blue

55 Yellow

55 (Weldable^A) Yellow (projecting end) & White (encased end)

105 Red

This table is inspired from ASTM F1554-20 Section 18 (Product Marking)

^A: See S1

^S1. Weldable Grade 55 Bars and Anchor Bolts

^S1.1 The material described in this section is intended for welding. This supplemental section, by chemical composition restrictions and by a carbon equivalent formula, helps to provide assurance of weldability.

^S1.2 Welding technique is of fundamental importance when bolts produced to this supplementary section are welded. See Note 2.

^S1.3 These supplementary requirements supersede conflicting provisions of the general specification.

^S1.4 Chemical Composition:

^S1.4.1 Steel shall conform to the following limitations: (See table S1.4.1 below)

^S1.4.2 Carbon Equivalent—In addition to the requirements specified in S1.4.1, the analysis shall provide a carbon equivalent (CE) meeting the following requirements:

^S1.4.2.1 For alloy or low-alloy steel, the carbon equivalent shall not exceed 0.45 % when calculated as follows: (See calculus S1.4.1 below)

^S1.4.2.2 For carbon steel, the carbon equivalent shall not exceed 0.40 % when calculated as follows: (See calculus S1.4.2.2 below)

^S1.5 Marking – See 18.1.
Calculus S1.4.2.1
Calculus S1.4.2.2

S.1.41 – Steel shall conform to the following limitations:

Chemical Elements Heat Analysis Product Analysis

Carbon, max, % 0.30 0.33

Manganese, max % 1.35 1.41

Phosphorus, max, % 0.040 0.048

Sulfur, max, % 0.050 0.058

Silicon, max, % 0.50 0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Chemical Properties
Mechanical Properties

Chemical Composition Requirements for ASTM F1554 Gr.55 & Gr.105

Chemical Elements Heat Analysis Product Analysis

Carbon, max, % *** ***

Manganese, max % *** ***

Phosphorus, max, % 0.04 0.048^†

Sulfur, max, % 0.05 0.058

Copper, min, % (When specified) 0.20 0.18

This table is inspired from ASTM F1554-20 Table 1

^†Editorially corrected in April 2016.

Axial Tensile Properties for Full-Size Tests of F1554-20 Gr.105 Anchor Bolts

Nominal Diam. Stress Area, ^B, in.². Tensile Load, lbf Yield min, lbf

1/2 0.1419 17,700 – 21,300 14,900

5/8 0.226 28,200 – 33,900 23,700

3/4 0.334 41,800 – 50,100 35,100

7/8 0.462 57,800 – 69,300 48,500

1 0.606 75,800 – 90,900 63,600

1 1/8 0.763 95,400 – 114,400 80,100

1 1/4 0.969 121,000 – 145,000 102,000

1 1/2 1.405 176,000 – 216,000 148,000

1 3/4 1.90 238,000 – 285,000 200,000

2 2.50 312,000 – 375,000 262,000

2 1/4 3.25 406,000 – 488,000 341,000

2 1/2 4.00 500,000 – 600,000 420,000

2 3/4 4.93 616,000 – 740,000 518,000

3 5.97 746,000 – 896,000 627,000

3 1/4 7.10 — —

3 1/2 8.33 — —

3 3/4 9.66 — —

4 11.08 — —

This table is inspired by ASTM F1554-20 Table 2.

^B: Stress areas extracted from ASME B 1.1.

Tensile Properties for Bars and Machined Specimens for F1554 Gr.105

Tensile strength, KSI 125 – 150

Yield strength, min, ksi (0.2% offset) 105

Elongation in 8 in. , min, %^A 12

Elongation in 2 in. min, %^A 15

Reduction of Area, min, % 45

This table is inspired from ASTM F1554-20 Table 3

^A: Elongation in 8 in. applies to bars. Elongation in 2 in. applies to machined
specimens.

ASTM F1554 Product Marking
Grade	Color
36	Blue
55	Yellow
55 (Weldable^A)	Yellow (projecting end) & White (encased end)
105	Red

S.1.41 – Steel shall conform to the following limitations:
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	0.30	0.33
Manganese, max %	1.35	1.41
Phosphorus, max, %	0.040	0.048
Sulfur, max, %	0.050	0.058
Silicon, max, %	0.50	0.55

Axial Tensile Properties for Full-Size Tests of F1554-20 Gr.55 Anchor Bolts
Nominal Diam.	Stress Area, ^B, in.².	Tensile Load, lbf	Yield min, lbf
1/2	0.1419	10,600 – 13,500	7,800
5/8	0.226	17,000 – 21,500	12,400
3/4	0.334	25,000 – 31,700	18,400
7/8	0.462	34,600 – 43,900	25,400
1	0.606	45,400 – 57,600	33,300
1 1/8	0.763	57,200 – 72,500	42,000
1 1/4	0.969	72,700 – 92,100	53,300
1 1/2	1.405	105,000 – 133,000	77,300
1 3/4	1.90	142,000 – 180,000	104,500
2	2.50	188,000 – 238,000	138,000
2 1/4	3.25	244,000 – 309,000	179,000
2 1/2	4.00	300,000 – 380,000	220,000
2 3/4	4.93	370,000 – 468,000	271,000
3	5.97	448,000 – 567,000	328,000
3 1/4	7.10	532,000 – 674,000	390,000
3 1/2	8.33	625,000 – 791,000	458,000
3 3/4	9.66	724,000 – 918,000	531,000
4	11.08	831,000 – 1,053,000	609,000

Tensile Properties for Bars and Machined Specimens for F1554 Gr.55
Tensile strength, KSI	75 – 95
Yield strength, min, ksi (0.2% offset)	55
Elongation in 8 in. , min, %^A	18
Elongation in 2 in. min, %^A	21
Reduction of Area, min, %	30

Tensile Properties for Bars and Machined Specimens for F1554 Gr.105
Tensile strength, KSI	125 – 150
Yield strength, min, ksi (0.2% offset)	105
Elongation in 8 in. , min, %^A	12
Elongation in 2 in. min, %^A	15
Reduction of Area, min, %	45