BILSTEIN ZE steels â€“ BILSTEIN CEE

Special steels

BILSTEIN ZE grades

BILSTEIN’s ZE grades are characterised by minimum yield strengths from 500 to 1,200 MPa and excellent cold formability. These special grades are used where the demand for component strength is at the highest level and may be accompanied by a weight and cost advantage.

Developed by BILSTEIN, the materials combine reliable cold-rolling and heat-treatment strategies, enabling customers to choose minimum yield strengths of anything from 500 to 1,200 MPa.

The steels are based on pearlite-reduced, microalloyed hot-rolled steel strips, and can be welded using all standard techniques. The low carbon equivalent (CE) is important to note, while spot and laser welding have proven to be particularly suitable, with no observable decline in yield strength in the heat-affected zones. Moreover a high yield-to-tensile strength ratio offers excellent preconditions for the roll forming process.

BILSTEIN ZE grades offer all the benefits associated with cold rolled steel, such as:

Homogeneous mechanical properties
Excellent surface quality
Superior shape and flatness

Applications:
Automotive seat structures, automotive seat-belt components, airbag systems, transmission components, vehicle door and locking systems, slide-rail systems, furniture hinges, connector plates for window profiles

The infinite-set material concept

A special feature of BILSTEIN's ZE steels is the infinite-set material concept, which allows us to set a material's yield strength to suit a speciic application.

The table below exemplifies the potential variety of products.

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	RL	RM^a	RR^a
ZE500	1.0489	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE550	1.0489	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE600	1.0548	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE650	1.0550	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE700	1.0550	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE750	1.0556	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE800	1.0556	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE850	1.0556	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE900	1.0556	0.2 - 4	5 - 650	0.008 - 0.156	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE950	1.0958	0.2 - 3	5 - 650	0.008 - 0.117	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE1000	1.0958	0.2 - 3	5 - 650	0.008 - 0.117	0.195 - 25.35	•	•	•	•	•	•	•	•
ZE1050	1.0958	0.2 - 3	5 - 650	0.008 - 0.117	0.195 - 25.35	•	•	•	•	•	•
ZE1100	1.0958	0.2 - 3	5 - 650	0.008 - 0.117	0.195 - 25.35	•	•	•	•	•	•	•	•

a = measured at the cross section

		Mass-share in %
Short name	Material number	C max	Si max	Mn max	P max	S max	Al min	NB max	Ti max	Cr + Mo max	Nb + Ti max	B max	V max
ZE500	1.0489	0.10	0.50	1.00	0.025	0.025	0.015	0.090	0.150				0.220
ZE550	1.0489	0.10	0.50	1.00	0.025	0.025	0.015	0.090	0.150				0.220
ZE600	1.0548	0.10	0.50	1.10	0.025	0.025	0.015	0.090	0.150				0.220
ZE650	1.0550	0.10	0.50	1.60	0.025	0.025	0.015	0.090	0.150				0.220
ZE700	1.0550	0.10	0.50	1.60	0.025	0.025	0.015	0.090	0.150				0.220
ZE750	1.0556	0.10	0.50	1.60	0.025	0.003	0.015	0.090	0.150				0.220
ZE800	1.0556	0.10	0.50	1.60	0.025	0.003	0.015	0.090	0.150				0.220
ZE850	1.0556	0.10	0.50	1.60	0.025	0.003	0.015	0.090	0.150				0.220
ZE900	1.0556	0.10	0.50	1.60	0.025	0.003	0.015	0.090	0.150				0.220
ZE950	1.0958	0.18	0.80	2.20	0.080	0.015	2.0			1.0	0.150	0.005	0.200
ZE1000	1.0958	0.18	0.80	2.20	0.080	0.015	2.0			1.0	0.150	0.005	0.200
ZE1050	1.0958	0.18	0.80	2.20	0.080	0.015	2.0			1.0	0.150	0.005	0.200
ZE1100	1.0958	0.18	0.80	2.20	0.080	0.015	2.0			1.0	0.150	0.005	0.200

Short name	Material number	Rp _0,2 MPa min	Rm MPa min	A₈₀% min	Rp/Rm % min	Bending radius 180° longt. min	Bending radius 180° cross min	Ag min
ZE500	1.0489	500	550	13	90	0.5 s	0.5 s
ZE550	1.0489	550	600	12	90	0.5 s	0.5 s
ZE600	1.0548	600	650	11	90	0.5 s	0.5 s
ZE650	1.0550	650	700	11	93	0.7 s	1 s
ZE700	1.0550	700	750	11	94	0.7 s	1 s
ZE750	1.0556	750	800	10	95	0.7 s	1 s	6
ZE800	1.0556	800	850	9	95	0.7 s	1 s	5
ZE850	1.0556	850	900	9	96	1 s	1 s	5
ZE900	1.0556	900	950	8	96	1 s	1 s	4
ZE950	1.0958	950	1000	7	95	1 s	1 s	4
ZE1000	1.0958	1000	1050	6	95	1 s	1.5 s	3
ZE1050	1.0958	1050	1100	5	95	1.5 s	2 s	3
ZE1100	1.0958	1100	1150	4	95	1.5 s	2 s	2