High-carbon steel strip: Bainitic hardened

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	V	Ni
C60S	1.1211	EN 10132-4	0.57 - 0.65	0.15 - 0.35	0.60 - 0.90	0.025	0.025	max. 0.40	-	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. 0.40
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. 0.40

BAINITIC HARDENED STRIP: HIGH STRENGTH AND DUCTILITY

CHEMICAL COMPOSITIONS AND MECHANICAL CHARACTERISTICS

Bainitic hardened steel strip is obtained by means of a heat treatment that consists of rapid cooling of the steel piece from a high temperature. To achieve this result, the strip is kept at an intermediate temperature for a certain time, forming a bainitic structure. The main characteristic of bainitic hardened strip is its ductility, so that the material can be deformed without breaking. In addition, this type of strip has high hardness and mechanical strength.

Among the options available at VINCO for bainitic hardened steel strips are the following chemical compositions: C60S with 0.57-0.65% quenched carbon and good mechanical strength; C67S containing 0.65-073% quenched carbon with high strength and hardness; C75S composed of 0.70-0.80% carbon and quenched steel. The latter is characterized by a good combination of strength and flexibility.

In the "Mechanical properties" section of the product sheet you can check the difference between bainitic hardening and martensitic hardening according to the thickness and strength of the material. The mechanical properties of this type of strip are agreed at the time of order. Please contact our team of experts so that they can advise you according to your needs on the contact telephone number (+34) 94 412 33 99 or send us an email to info@vinco.es.

High carbon steel strip, bainitic hardened strip

FINISHES AND TOLERANCES FOR BAINITIC HARDENED STRIP

High carbon steel strips such as banitic hardening have finishes subject to the EN 10132-4:2000 standard that applies to cold-rolled strips for heat treatment. The surface finish or roughness of the strip is determined at the time of the order according to your needs.

The tolerances for this type of strapping are detailed in the product sheet and are divided into: thickness tolerances, width tolerances, length tolerances and arrow tolerances, which refer to the arching of the strapping strips. In addition, the flatness tolerance for strip strips is also detailed.

VINCO is ISO 9001:2015 and ISO 14001:2015 certified for the cutting and marketing of steel strips. This reflects that we work under quality standards throughout the delivery process, always meeting the needs of our customers.

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)

C60S	1.1211	EN 10132-4
C67S	1.1231	EN 10132-4	1065	A505/506	SUP 10	G4802	70	GB/T 1222
C75S	1.1248	EN 10132-4	1074	A682/684	-	-	-	-

Classification of symbols	Numerical classification	European Standard (EN)
C60S	1.1211	EN 10132
C67S	1.1231	EN 10132
C75S	1.1248	EN 10132

The mechanical properties are not specified in any standard on the date of publication of this information.
The mechanical properties must be agreed when placing the order.
The typical values fall within the range of 900-1400N/mm².
The hardness/tensile strength specification must fall within a range of 150 N/mm² or 50 HV, unless stated otherwise in the commercial agreement.

For information purposes, the table below shows the difference between austempering and martensitic hardening.

Difference between austempering and martensitic hardening

EN 10132-4:2000

The requirements regarding roughness can be agreed when requesting the quote or placing the order.

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.