mark of steel it is necessary to all of us that we know about mark of steel.

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2. Ministry of higher education
Baghlan university
Engineering faculty
Civil dept.
Mark of steel
Presents by: Group (10 )
Prof. in charge: Zakirullah(Zaki)
(Date: 2019/6/23)
23/6/2019
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3. Presents by:
Ehsanullah (Sultani) Mohammad mukhtar
(murzaee)
Sayed omid (aqbaly)
Mohammad Reza
(Rahimi)
Mohammad Abid
(Mohammadi)

4. Outlines
 Introduction
 Reinforcing Bars
 ASTM
 lower strength reinforcing bars
 Conclusion
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5. Introduction
 A steel bar as brought from the factory. This is the picture
of steel bar before cutting down into required pieces. The
normal length of this bar is 40 feet with a fold at 20 feet.
Steel is the main stay when we talk about reinforced
concrete . This adds to the strength of our building.

6. Reinforcing Bars
 Reinforcing bars are hot-rolled from a variety of steels in
several different strength grades.
 Most reinforcing bars are rolled from new steel billets,
but some are rolled from used railroad-car axles or
railroad rails that have been cut into roll able shapes.
 An assortment of strengths are available.
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7. ASTM
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 The American Society for Testing Materials (ASTM) has
established a standard branding for deformed reinforcing
bars.
 There are two general systems of bar branding. Both
systems serve the basic purpose of identifying the marker
size, type of steel, and grade of each bar.
 In both systems an identity mark denoting the type of
steel used is branded on every bar by engraving the final
roll used to produce the bars so as to leave raised symbols
between the deformations.

8. ASTM A36 Steel Properties
 ASTM A36 has a yield strength of 36,000 psi and an
allowable bending stress of 22,000 psi.
 ASTM A36 is used for most building components,
including columns, beams, flooring and finish
elements.
 The ductility of ASTM A36 doesn't allow the alloy to
be used as cable , and it should not be used as
reinforcing bar (rebar). 6/23/2019
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9. ASTM……Contd
 The manufacturer's identity mark that signifies the mill
that rolled the bar is usually a single letter or, in some
cases, a symbol.
 The bar size follows the manufacturer's mark and is
followed by a symbol indicating new billet steel (-N-),
rolled rail steel (-I-), or rolled axle steel (-A-).
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10. Strength of reinforcing bars
 The lower strength reinforcing bars show only three marks: an
initial representing the producing mill, bar size, and type of
steel.
 The high strength reinforcing bars use either the continuous
line system or the number system to show grade marks.
 In the line system, one continuous line is rolled into the 60,000
psi bars, and two continuous lines are rolled into the 75,000
psi bars.
 a "60" is rolled into the bar following the steel type of mark to
denote 60,000 psi bars, and a "75" is rolled into the 75,000 psi
bars. 6/23/2019

11. ‫سیخ‬ ‫مارک‬ ‫دریافت‬ ‫طریقه‬
‫قسمیکه‬‫اکثریت‬‫ما‬‫و‬‫شما‬‫در‬‫شاخت‬‫مقاومت‬‫سیخها‬‫و‬‫قطر‬‫های‬
‫آن‬‫مشکل‬‫داریم‬‫و‬‫وقتیکه‬‫برای‬‫اعمار‬‫خانه‬‫خود‬‫به‬‫بازار‬‫میرویم‬
‫نمیفهمیم‬‫کدام‬‫گرید‬‫سیخ‬‫است‬‫و‬‫همچنان‬‫قطر‬‫سیخ‬‫چند‬‫است‬.
‫در‬‫هر‬‫سیخ‬‫از‬‫طرف‬‫باال‬‫به‬‫طرف‬‫پایین‬‫نوشته‬‫های‬‫ذیل‬‫درج‬
‫میباشند‬:
‫در‬‫شکل‬‫ذیل‬‫این‬‫حرف‬(H)‫است‬‫و‬‫این‬‫حرف‬‫صرف‬‫نشاني‬
‫کمپني‬‫تولید‬‫کننده‬‫است‬‫و‬‫امکان‬‫دارد‬‫به‬‫جای‬(H)‫دیګر‬‫حرف‬‫ها‬
‫باشند‬‫مشکل‬‫ندارد‬‫بخاطریکه‬‫نشاني‬‫کمپنی‬‫تولید‬‫کننده‬‫است‬‫و‬
‫بس‬.
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12. ‫مارک‬ ‫دریافت‬ ‫طریقه‬‫سیخ‬.....‫ادامه‬
‫این‬‫اعداد‬‫نمبر‬‫سیخ‬‫است‬‫که‬‫در‬‫شکل‬‫ذیل‬‫این‬‫عدد‬(11)‫است‬
‫یعنی‬(#11)،‫در‬‫سیستم‬‫امریکايي‬‫به‬‫جای‬‫قطر‬‫سیخ‬،‫نمیر‬‫سی‬‫خ‬
‫نوشته‬‫میکند‬‫یعنی‬‫توسط‬‫این‬‫عدد‬‫ما‬‫قطر‬‫سیخ‬‫دریافت‬
‫میکنیم،اینکه‬‫نمبر‬‫به‬‫قطر‬‫چی‬‫قسم‬‫تبدیل‬‫میشود‬‫طوری‬‫ذی‬‫ل‬‫عمل‬
‫میکنیم‬:
‫هر‬‫نمبر‬‫که‬‫ذکر‬‫بود‬‫تقسیم‬‫بر‬8‫میکنیم‬‫بعدا‬‫ضرب‬2.54‫و‬‫بعد‬
‫ضرب‬10‫میکنیم‬‫در‬‫نتیجه‬‫قطر‬‫سیخ‬‫از‬‫جنس‬‫ملی‬‫متر‬‫بدست‬
‫میاید‬.
‫مثال‬:‫اګر‬‫این‬‫نمبر‬‫عدد‬11‫باشد‬‫پس‬‫با‬‫استفاده‬‫از‬‫روش‬‫فوق‬
‫قطر‬‫این‬‫سیخ‬34‫ملی‬‫متر‬‫است‬.
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13. ‫انگلیسی‬ ‫الفبای‬
‫حرف‬ ‫این‬ ‫ذیل‬ ‫شکل‬ ‫در‬(S)‫سیخ‬ ‫نوعیت‬ ‫حرف‬ ‫این‬ ‫توسط‬ ‫و‬ ‫است‬
‫حرف‬ ‫ساختماني‬ ‫سیخګول‬ ‫برای‬ ‫که‬ ‫میشود‬ ‫معلوم‬ ‫فوالدی‬(S)‫ذکر‬
‫میشود‬ ‫کار‬ ‫نیز‬ ‫ذیل‬ ‫حروف‬ ‫سیخ‬ ‫نوعیت‬ ‫به‬ ‫نظر‬ ‫و‬ ‫میشود‬.
‫مثال‬
(S)،(A)،(W)،(SS)،(CS)
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14. ‫انگلسي‬ ‫عدد‬
‫این‬‫عدد‬‫نشان‬‫دهنده‬‫مقاوت‬‫یا‬‫مارک‬‫یا‬‫ګرید‬‫از‬‫جنس‬‫پوند‬‫بر‬‫انچ‬
‫مربع‬‫نشان‬‫میدهد‬،‫در‬‫شکل‬‫ذیل‬‫این‬‫عدد‬(60)‫است‬‫به‬‫این‬‫معنی‬
‫که‬‫مارک‬‫یا‬‫ګرید‬‫سیخ‬60‫است‬‫که‬‫معادل‬‫به‬415‫نیوتن‬‫فی‬‫ملی‬
‫متر‬‫مربع‬‫میشود‬‫و‬‫نظر‬‫به‬‫ګرید‬،‫سیخ‬‫این‬‫اعداد‬‫تغیر‬‫میکند‬‫م‬‫ګر‬‫به‬
‫یاد‬‫داشته‬‫باشید‬‫که‬‫همین‬‫عدد‬‫نمایندګي‬‫از‬‫ګرید‬‫سیخ‬‫میکن‬‫د‬‫یعني‬
‫اګر‬‫این‬‫عدد‬50‫باشد‬‫به‬‫این‬‫معنی‬‫که‬‫سیخ‬‫به‬‫ګرید‬60‫نه‬‫بلکی‬
‫ګرید‬50‫است‬‫و‬‫از‬‫ګرید‬60‫مقاومت‬‫کمتر‬‫دارد‬.
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15. ‫نوت‬:
‫عدد‬‫اول‬‫انگلسي‬‫نشان‬‫دهنده‬‫نمبر‬‫سیخ‬‫است‬‫که‬‫توسط‬‫این‬
‫نمبر‬‫قطر‬‫سیخ‬‫دریافت‬‫میشود‬‫و‬‫هر‬‫قدر‬‫این‬‫عدد‬‫باال‬‫باشد‬‫به‬
‫همان‬‫اندازه‬‫سیخ‬‫ضخیم‬‫و‬‫قطر‬‫آن‬‫باال‬‫میباشد‬‫و‬‫بر‬‫عکس‬‫عدد‬
‫آخري‬‫نشان‬‫دهنده‬‫مقاومت‬‫یا‬‫ګرید‬‫سیخ‬‫است‬‫و‬‫هر‬‫قدر‬‫این‬‫عدد‬
‫بلند‬‫باشد‬‫به‬‫همان‬‫اندازه‬‫مقاومت‬‫سیخ‬‫بیشتر‬‫میشود‬.‫ګرید‬40
‫نشان‬‫داده‬‫نمیشود‬‫یعنی‬‫سیخ‬‫هاییکه‬‫مارک‬‫یا‬‫گرید‬‫آن‬‫از‬40‫یا‬
‫کمتر‬‫باشد‬‫نشان‬‫داده‬‫نمیشود‬.
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16. Conclusion
A steel bar as brought from the factory. This is the picture
of steel bar before cutting down into required pieces. The
normal length of this bar is 40 feet with a fold at 20 feet.
Steel is the main stay when we talk about reinforced
concrete. This adds to the strength of our building. The
American Society for Testing Materials (ASTM) has
established a standard branding for deformed reinforcing
bars.
6/23/2019

17. References
 https://www.engineeringcivil.com/steel-bar.html
 http://electronicstechnician.tpub.com/14344/Marking-System-
417.html
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18. Questions????
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