High-carbon steel strip: With rolling hardness (+CR)

Chemical Composition
Equivalents
Mechanical properties
Finishes
Tolerances

Classification of symbols	Numerical classification	European Standard (EN)	Chemical Composition
Classification of symbols	Numerical classification	European Standard (EN)	C	Si	Mn	Max. P	Max. S	Cr	Mo	Ni
C45E	1.1191	EN 10132-3	0.42 - 0.50	max. 0.40	0.50 - 0.80	0.035	0.035	max. 0.40	max. 0.10	max. 0.40
C67S	1.1231	EN 10132-4	0.65 - 0.73	0.15 - 0.35	0.60 - 0.90	0.025	0.025	max. 0.40	max. 0.10	max. 0.40
C75S	1.1248	EN 10132-4	0.70 - 0.80	0.15 - 0.35	0.60 - 0.90	0.025	0.025	max. 0.40	max. 0.10	max. 0.40

STEEL STRIP WITH ROLLING HARDNESS

MAIN MECHANICAL CHARACTERISTICS

At VINCO we are specialists in the supply of strips of different materials that adapt to all types of applications. The steel strips with rolling hardness that we offer you are divided into three symbolic classifications depending on the carbon content and the treatment of the material: the C45E designation is governed by the EN 10132-3 standard. This type of strip is composed of 0.42-0.50% carbon with steel normalized by a heat treatment that improves its mechanical properties; while the C67S and C75S designations are governed by the EN 10132-4 standard. These steel strips are composed of 0.65-0.73% and 0.70-0.80% carbon, respectively. According to each chemical composition, mechanical properties and hardness requirements are determined based on maximum tensile strength (Rm N/mm2) and maximum Vickers hardness (HV max). All this information is detailed in the mechanical characteristics section of the product data sheet.

high-carbon-content-strap-with-lamination-hardness-CR

FINISHES AND SUPPLY OPTIONS FOR STEEL STRIP WITH ROLLING HARDNESS

The finishes for steel strip with rolling hardness are determined under EN 10132-3:2000 and EN 10132-4:2000, but they must always have a shiny surface finish as a result of the cold rolling process. As far as the level of roughness is concerned, it can be determined at the time of order or quotation according to the customer's requirements.

The supply possibilities we have available at VINCO include the cookie or coil format, spooled and palletized. It is important to take into account that, depending on the curvature of the strap coil, what is known as deflection or winding memory can be produced. All delivery formats are equipped with protection systems that guarantee the shipment and transport of goods in good conditions: box, lid, intermediate cardboard or wooden blocks, corner protectors, anti-dust plastic bag, VCI anti-humidity paper or plastic, phytosanitary or maritime packaging and anti-humidity bags.

Regardless of the type of supply applied, the density of high-carbon steel strip is 7.85 kg/dm³. And if you want to calculate the weight and dimensions of the coil, we make it easy for you with our weight calculator. Contact us for more information.

Classification of symbols	Numerical classification	European Standard (EN)	Approximate international equivalents
Classification of symbols	Numerical classification	European Standard (EN)	US (AISI)		Japan (JIS)		China (GB)

C45E	11191	EN 10132-3	1045	A682/684	S45C	G4051	45	GB 3522
C67S	11231	EN 10132-4	1065	A682/684	S65C-CSP	G4802	70	GB/T 1222
C75S	11248	EN 10132-4	1074	A682/684	-	-	-	-

Classification of symbols	Numerical classification	European Standard (EN)	Mechanical properties and hardness requirements
			Cold rolling (+CR)
			Rm N/mm² max	Max. HV
C45E	1.1191	EN 10132	1020	290
C67S	1.1231	EN 10132	1140	315
C75S	1.1248	EN 10132	1170	320

Note: it is possible to specify the hardness values or the tensile strength values, but not both. If neither of the two values is specified, the tensile strength value is calculated.
The specification for tensile strength/hardness must fall within a range of 150 N/mm² or 50 HV, unless expressly stated otherwise in the commercial agreement.

EN 10132-2:2021

Surface finish can be "rough" (RR), "matte" (RM), "smooth" (RL).

Products with MA and MB surface appearance are generally supplied with RL surface finish. If "rough" or "matte" surface finish is requested, the corresponding symbol must be indicated in the designation.

Roughness requirements must be agreed upon at the time of request for quotation or order.
Cold-rolled strip should have a final bright surface finish, as obtained during rolling or annealing in a controlled atmosphere.

Surface appearance			Special surface finish
Symbol	Characteristics	Field of application
Symbol	Characteristics	Field of application		MA	Bright, clean, metallic surface; pitting grooves and scratches are not allowed.	All thicknesses and supply conditions.	RR, RM, RL
MB	Bright, metallic, clean surface; pitting grooves and scratches are acceptable as long as the smooth, uniform appearance is not substantially affected to the naked eye.	Thicknesses ≤ 2.0 mm and supply conditions +LC +CR	RM, RL

The different surface finishes for the +LC and +CR conditions are as follows:

Finished	Roughness
Rough	RR	Ra ≥ 1.5 µm
Rough	RR	Ra ≥ 1.5 µm	Matte	RM	0.6 µm > Ra ≤ 1.8 µm
Normal	RL	Ra ≤ 0.6 µm

THICKNESS TOLERANCES

A) Specified thickness tolerances for cold rolled strip and strip obtained strapping wide precision rolling w.

According to the EN 10140:2006 Standard.

Nominal Thickness t		Thickness tolerances according to EN 10140 for nominal widths w of
Nominal Thickness t		<125			≥ 125 and <600
>	≤	A normal	B fine	C precision	A normal	B fine	C precision
-	0.10	± 0.008	± 0.006	± 0.004	± 0.010	± 0.008	± 0.005
0.10	0.15	±0.010	± 0.008	± 0.005	± 0.015	± 0.012	± 0.010
0.15	0.25	±0.015	± 0.012	± 0.008	± 0.020	± 0.015	± 0.010
0.25	0.40	± 0.020	± 0.015	± 0.010	± 0.025	± 0.020	± 0.012
0.40	0.60	± 0.025	± 0.020	± 0.012	± 0.030	± 0.025	± 0.015
0.60	1.00	± 0.030	± 0.025	± 0.015	± 0.035	± 0.030	± 0.020
1.00	1.50	± 0.035	± 0.030	± 0.020	± 0.040	± 0.035	± 0.025
1.50	2.50	± 0.045	± 0.035	± 0.025	± 0.050	± 0.040	± 0.030
2.50	4.00	± 0.050	± 0.040	± 0.030	± 0.060	± 0.050	± 0.035
4.00	6.00	± 0.060	± 0.050	± 0.035	± 0.070	± 0.055	± 0.040

Sizes in mm.

WIDTH TOLERANCES

Width tolerances for strips with sheared edges		Standard slitting tolerances for VINCO¹⁾				Width tolerances according to the EN 10140 Standard for nominal widths of:
Nominal Thickness t		3-15	15-50	50-150	>150	<125		≥ 125 and <250		≥250 and <600
>=	<	3-15	15-50	50-150	>150	A	B	A	B	A	B
0.1	0.4	± 0.075²⁾	± 0.075²⁾	± 0.075²⁾	± 0,10²⁾	± 0.15	± 0.10	± 0.20	± 0.13	± 0.25	± 0.18
0.4	0.7	± 0,085	± 0,09	± 0,10	± 0,12	± 0.15	± 0.10	± 0.20	± 0.13	± 0.25	± 0.18
0.7	1.0	± 0.085³⁾	± 0.09³⁾	± 0.10 ³⁾	± 0.12 ³⁾	± 0.20	± 0.13	± 0.25	± 0.18	± 0.30	± 0.20
1.0	1.5	± 0.10 ⁴⁾	± 0.10 ⁴⁾	± 0.10 ⁴⁾	± 0.15 ⁴⁾	± 0.20	± 0.13	± 0.25	± 0.18	± 0.30	± 0.20
1.5	2.5	on request	± 0.13⁵⁾	± 0.15⁵⁾	± 0.16 ⁵⁾	± 0.25	± 0.18	± 0.30	± 0.20	± 0.35	± 0.20
2.5	2.6	on request	on request	± 0.16	± 0.175	± 0.25	± 0.18	± 0.30	± 0.20	± 0.35	± 0.25
2.6	4.1	on request	on request	± 0.16	± 0.175	± 0.30	± 0.20	± 0.35	± 0.25	± 0.40	± 0.30
4.1	6.1	on request	on request	± 0.16	± 0.175	± 0.35	± 0.25	± 0.40	± 0.30	± 0.45	± 0.35

1) Other, closer dimensional tolerances are possible under a commercial agreement

2) Including the value t= 0.4

3) Including the value t= 1

4) Including the value t= 1.5

5) Including the value t= 2.5

LENGTH TOLERANCES

Length tolerances	Closer tolerances are possible under a commercial agreement	Positive tolerance in relation to the nominal length, according to the EN 10140 Standard for the
Nominal length L	Closer tolerances are possible under a commercial agreement	Class A	Class B
L ≤ 1000	+ 2	+ 10	+ 6
1000 < L ≤ 2500	+0,002L	+ 0.01 L	+ 6
L > 2500	+0,002L	+ 0.01 L	+ 0.003 L

Sizes in mm.

EDGE CAMBER TOLERANCES

Nominal width (w)	Closer edge curve tolerances possible under a commercial agreement		Edge curve tolerances according to the EN 10140 Standard
	Maximum deviation 1000 mm
	Thickness t		Class A (Normal) (maximum deviation)	Class B (FS) (Reduced) (maximum deviation)


	t ≤ 1.20 mm	t > 1.20 mm
3 ≤ W < 6	2.50	4.00	-	-
6 < W ≤ 10	2.00	3.00	-	-
10 < W ≤ 20	1.00	1.50	5.00	2.00
20 < W < 25	1.00	1.50	5.00	2.00
25 ≤ W < 40	1.00	1.50	3.50	1.50
40 ≤ W < 125	1.00	1.50	2.50	1.25
125 ≤ W ≤ 350	1.00	1.50	2.00	1.00
350 < W < 600	-	-	2.00	1.00

Sizes in mm.

The absolute value of the tolerance can be divided within that range.

RIPPLE - LONGITUDINAL FLATNESS

The flatness tolerance of the strips in cut lengths in the direction of rolling must be a maximum of 10 mm over 1000 mm. Any other flatness requirement must be agreed when placing the order.

* The data contained in this catalogue are for information purposes only and are not under any circumstances, contractual supply conditions. Errors and omissions excepted.