Concrinox TM

Using stainless steel in concrete reiforcement structures

- What are stainless steels
- Corrosion resistance
- Ductility
- Toughness
- Behaviour at high and low temperatures
- Wear resistance
- Weldability
- Magnetic properties
- Economic considerations
- Application fields
- Specifications
- Technical bibligraphy

Available products

- Improved bond bars and wire rods
- Mesh and lattice girders
- Ask the expert

SPECIFICATIONS

Standard norms for stainless steel mechanical properties of bars are given in BS 6744:2001 and in ASTM 955-955M.

Concerning Italian norms (DM 09/01/96) refer to FeB44k norms, general term valid for low alloyed carbon steels for which the following is required

Typical yield strenght	f_yk >= 430 N/mm²
Typical rupture strenght	f_tk >= 540 N/mm²
Ductility ratio	f_y/f_yk <= 1,35
Elongation A₅	>=12%

For BS 6744:2001 the following stainless steels are covered for (EN 10088-1): 1.4301 - 1.4436 - 1.4429 - 1.4462 - 1.4501 - 1.4529

BS 6744:2001 - Table 2, Standard Sizes

Grade	Nominal Sizes (mm)
200 *	3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 25, 30, 35, 40, 50
500	3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 25, 30, 40, 50
650	3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 25
* Plain only

BS 6744:2001 - Table 7, Tensile properties

GRADE	0,2% proof strength Rp0,2 MPa	Stress ratio Rm/Rp0,2 (min)	Elongation at fracture A5 (min.)%	Total elongation at max force Agt (min)%
200 *	200	1,10	22	5
500	500	1,10	14	5
650	650	1,10	14	5
Rm is the ultimate tensile strenght * Plain only

For ASTM 955M austenitic, ferritic, martensitic and duplex stainless steels are in accordance with ASTM A 262 specification.
ASTM A 955M, Table 2, Tensile properties

GRADE	0,2% proof strength Rp0,2 MPa	Tensile strength (min) MPa	Elongation in 200 mm (min.) %	Bar designation n. *
300	300	500	11-12	10-13-16-19
420	420	620	7-9	10-13-16-19-22-25-29-32-36-43-57
520	520	690	6-7	19-22-25-29-32-36-43-57
* It is a codified value that corresponds almost to the bar nominal diameter expressed in mm.

For UNE 36-067-94 the properties are:

GRADE	0,2% proof strength Rp0,2 MPa	Tensile strength (min) MPa	Elongation in 200 mm (min.) %	Rapporto Rm/Rp minimo
B500 T INOX	500	600	18	1,10
B600 T INOX	600	700	18	1,10

COGNE PRODUCTS IDENTIFICATION

HOT-ROLLED BARS

THE REBARS PRODUCED BY COGNE ACCIAI SPECIALI ARE MARKED ACCORDING TO THE ITALIAN AND EUROPEAN NORMS ENV 10088/94.

COLD DRAWN BARS

	In accordance with the ministerial decrees D.M. 9/1/96 and 16/1/96, Cogne Acciai Speciali products for building application are certified by the Section 'Scienze della Costruzione e Geo-struttura' of the 'POLITECNICO DI TORINO'.
	Cogne Acciai Speciali products for building application are certified by CARES UK.

You can download the certificates in PDF format in the 'Quality certifications' section.