Spring steels â€“ BILSTEIN CEE

DIN EN 10132-4

Spring steels

What do springs, washers, axial bearings, fasteners, handsaws, clutches, seat-belt catches and seat-belt buckles have in common? Each one is produced using cold-rolled spring steel developed specially for the end product. Especially shape and microstructure need to be considered carefully. In some cases it is essential to ensure that the steel can be easily formed, and its microstructure is well-suited for heat treatment. At other times, optimizing tool life and/or the surface finish is the priority. These requirements can only be delivered by pairing top level knowledge of material science with first-rate cold-rolling expertise.

Tempered martensitic and bainitic steels, with decarburized surfaces on request, can be used for a wide variety of applications and ensure availability of ideal base material for each application. Tempered steels are available in a variety of colors, and with brushed, ground and even polished finishes.

Applications:
Springs, washers, axial bearings, fasteners, handsaws, clutches, seat-belt catches, seat-belt buckles

PRODUCTS

Types of steel

Overview

Chemical properties

Mechanical properties

Short name	Material number	Thickness in mm^a	Width in mm^a	Thickness in inch^a	Width in inch^a	Coil	Spool^a	Bar^a	MA	MB^a	RN^a	RL	RM^a	RR^a
C55S	1.1204	0.04 - 12	8 - 650	0.002 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C60S	1.1211	0.04 - 12	8 - 650	0.002 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C67S	1.1231	0.04 - 12	8 - 650	0.002 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C75S	1.1248	0.04 - 12	8 - 650	0.002 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C85S	1.1269	0.04 - 8	8 - 650	0.002 - 0.312	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C90S	1.1217	0.04 - 8	8 - 650	0.002 - 0.312	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C100S	1.1274	0.04 - 8	8 - 650	0.002 - 0.312	0.312 - 25.35	•	•	•	•	•	•	•	•	•
C125S	1.1224	0.04 - 8	8 - 520	0.002 - 0.312	0.312 - 20.28	•	•	•	•	•	•	•	•	•
48Si7	1.5021	0.10 - 12	8 - 650	0.004 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
56Si7	1.5026	0.10 - 12	8 - 650	0.004 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
51CrV4	1.8159	0.10 - 12	8 - 650	0.004 - 0.468	0.312 - 25.35	•	•	•	•	•	•	•	•	•
80CrV2	1.2235	0.04 - 8	8 - 520	0.002 - 0.312	0.312 - 20.28	•	•	•	•	•	•	•
75Ni8	1.5634	0.04 - 8	8 - 650	0.002 - 0.312	0.312 - 25.35	•	•	•	•	•	•	•	•	•
125Cr2	1.2002	0.04 - 8	8 - 520	0.002 - 0.312	0.312 - 20.28	•	•	•	•	•	•	•
102Cr6	1.2067	0.04 - 8	8 - 650	0.002 - 0.312	0.312 - 25.35	•	•	•	•	•	•	•	•	•

a = measured at the cross section

		Mass-share in %
Short name	Material number	C	Si	Mn	P max	S max	Cr	Mo max	Ni	V
C55S	1.1204	0.52 - 0.60	max 0.40	0.60 - 0.90	0.025	0.025	max. 0.4	0.1	max. 0.40
C60S	1.1211	0.57 - 0.65	max 0.40	0.60 - 0.90	0.025	0.025	max. 0.4	0.1	max. 0.40
C67S	1.1231	0.65 - 0.73	max 0.40	0.60 - 0.90	0.025	0.025	max. 0.4	0.1	max. 0.40
C75S	1.1248	0.70 - 0.80	max 0.40	0.60 - 0.90	0.025	0.025	max. 0.4	0.1	max. 0.40
C85S	1.1269	0.80 - 0.90	max 0.40	0.40 - 0.70	0.025	0.025	max. 0.4	0.1
C90S	1.1217	0.85 - 0.95	max 0.40	0.40 - 0.70	0.025	0.025	max. 0.4	0.1	max. 0.40
C100S	1.1274	0.95 - 1.05	max 0.40	0.30 - 0.60	0.025	0.025	max. 0.4	0.1	max. 0.40
C125S	1.1224	1.20 - 1.30	max 0.40	0.30 - 0.60	0.025	0.025	max. 0.4	0.1	max. 0.40
48Si7	1.5021	0.45 - 0.52	1.60 - 2.00	0.50 - 0.80	0.025	0.025	max. 0.4	0.1	max. 0.40
56Si7	1.5026	0.52 - 0.60	1.60 - 2.00	0.60 - 0.90	0.025	0.025	max. 0.4	0.1	max. 0.40
51CrV4	1.8159	0.47 - 0.55	max. 0.40	0.70 - 1.10	0.025	0.025	0.9 - 1.2	0.1	max. 0.40	0.10 - 0.25
80CrV2	1.2235	0.75 - 0.85	max 0.40	0.30 - 0.50	0.025	0.025	0.4 - 0.6	0.1	max. 0.40	0.15 - 0.25
75Ni8	1.5634	0.72 - 0.78	max 0.40	0.30 - 0.50	0.025	0.025	max. 0.15	0.1	1.80 - 2.10
125Cr2	1.2002	1.20 - 1.30	max 0.40	0.25 - 0.40	0.025	0.025	0.4 - 0.6	0.1	max. 0.40
102Cr6	1.2067	0.95 - 1.10	max 0.40	0.20 - 0.40	0.025	0.025	1.35 - 1.60	0.1

Short name	Material number	Condition	Rp _0,2 MPa max	Rm MPa	A₈₀% min	HV min	HV max
C55S	1.1204	+A ; +LC	480	600	17		185
		+CR		1070			300
		+QT		1100 - 1700		340	520
C60S	1.1211	+A ; +LC	495	620	17		195
		+CR		1100			305
		+QT		1150 - 1750		345	530
C67S	1.1231	+A ; +LC	510	640	16		200
		+CR		1140			315
		+QT		1200 - 1900		370	580
C75S	1.1248	+A ; +LC	510	640	15		200
		+CR		1170			320
		+QT		1200 - 1900		370	580
C85S	1.1269	+A ; +LC	535	670	15		210
		+CR		1190			325
		+QT		1200 - 2000		370	580
C90S	1.1217	+A ; +LC	545	680	14		215
		+CR		1200			325
		+QT		1200 - 2100		370	600
C100S	1.1274	+A ; +LC	550	690	13		220
		+CR		1200			325
		+QT		1200 - 2100		370	630
C125S	1.1224	+A ; +LC	600	740	11		230
		+CR		1200			325
		+QT		1200 - 2100		370	630
48Si7	1.5021	+A ; +LC	580	720	13		225
		+QT		1200 - 1700		370	520
56Si7	1.5026	+A ; +LC	600	740	12		230
		+QT		1200 - 1700		370	520
51CrV4	1.8159	+A ; +LC	550	700	13		220
		+QT		1200 - 1800		370	550
80CrV2	1.2235	+A ; +LC	580	720	12		225
		+QT		1200 - 1800		370	550
75Ni8	1.5634	+A ; +LC	540	680	13		210
		+QT		1200 - 1800		370	550
125Cr2	1.2002	+A ; +LC	590	750	11		235
		+QT		1300 - 2100		405	630
102Cr6	1.2067	+A ; +LC	590	750	11		235
		+QT		1300 - 2100		405	630