Blattventilstahl, Ventilklappenstahl, Ventilklappen, Compressor Valve Steel, Valve Steel, Kompressoren Ventile, Lamellenventilstahl Blattventilstahl, Ventilklappenstahl, Ventilklappen, Compressor Valve Steel, Valve Steel, Kompressoren Ventile, Lamellenventilstahl

Benefits at a glance:

  • highest fatigue resistance
  • excellent surface finish
  • best purity grade
  • consistent, uniform microstructure
  • excellent stamping and punching properties, process reliability

Flapper Valve Steel

Stamping/punching shops und compressor manufacturers rely on valve flap steel for compressors that is fatigue-resistant and which can be easily processed. The quality of cooling units and air conditioners is based to a large extent on the quality and robustness of the valve flaps in the compressors. They are crucial for the power fluctuations in the operation of the compressors, for instance. This is another area where our technical expertise in flapper valve steel and the fast availability of our flapper valve steels give us a competitive advantage. If you would like to see for yourself how good the quality of our strip steel is then give us a call!

Parameters Recommendation
Thickness tolerance T3 – T4
Roughness class 3
Tensile strength range M
Flatness class 3
Surface white polished
Edges slit / deburred
Grade Eberle 18
Thickness t (in) Tolerances ± in
T1 T2 T3 T4 T5
.0008 ≤ t < .0016 .00016 .00012 .00008 .00006
.0016 ≤ t < .0025 .00020 .00016 .00012 .00008
.0025 ≤ t < .0039 .00024 .00020 .00016 .00012 .00008
.0039 ≤ t < .0049 .00028 .00020 .00016 .00012 .00008
.0049 ≤ t < .0063 .00035 .00024 .00020 .00016 .00012
.0063 ≤ t < .0079 .00039 .00028 .00020 .00016 .00012
.0079 ≤ t < .0098 .00043 .00031 .00024 .00016 .00012
.0098 ≤ t < .0124 .00051 .00035 .00028 .00020 .00016
.0124 ≤ t < .0157 .00059 .00043 .00031 .00024 .00016
.0157 ≤ t < .0197 .00067 .00047 .00035 .00024 .00016
.0197 ≤ t < .0248 .00079 .00055 .00039 .00028 .00020
.0248 ≤ t < .0315 .00091 .00067 .00047 .00031 .00024
.0315 ≤ t < .0394 .00106 .00075 .00051 .00035 .00028
.0394 ≤ t < .0492 .00134 .00094 .00067 .00047 .00031
.0492 ≤ t < .0630 .00154 .00110 .00079
.0630 ≤ t < .0689 .00181 .00130 .00091
Thickness t (in) Width w (in) Tolerances ± in
B1 B2 B3
t < .0098 w < .79 .003 .002 .001
.79 ≤ w < 1.97 .004 .003 .002
1.97 ≤ w < 4.92 .006 .004 .003
w ≥ 4.92 .008 .006 .004
.0098 ≤ t < .0197 w < .79 .004 .003 .002
.79 ≤ w < 1.97 .006 .004 .003
1.97 ≤ w < 4.92 .008 .006 .004
w ≥ 4.92 .010 .008 .006
.0197 ≤ t < .0394 w < .79 .006 .004 .003
.79 ≤ w < 1.97 .008 .006 .004
1.97 ≤ w < 4.92 .010 .008 .006
w ≥ 4.92 .012 .010 .006
.0394 ≤ t < .0630 w < .79 .008 .006 .004
.79 ≤ w < 1.97 .010 .008 .006
1.97 ≤ w < 4.92 .012 .010 .006
w ≥ 4.92 .014 .010 .008
.0630 ≤ t ≦ .0689 w < .79 .010 .008 .006
.79 ≤ w < 1.97 .012 .008 .006
1.97 ≤ w < 4.92 .014 .012 .008
w ≥ 4.92 .016 .012 .008

Available in white, blue and yellow

Surface Roughness

Thickness t (in) Roughness (nach DIN EN ISO 4287 : 1998)
Class 1 Class 2 Class 3
t ≤ .0197 Ra ≦ 11.8 µin
Rt ≦ 118 µin
Ra ≦ 9.8 µin
Rt ≦ 98 µin
Ra ≦ 5.1 µin
Rt ≦ 59 µin
.0197 < t ≤ .0276 Ra ≦ 7.9 µin
Rt ≦ 79 µin
.0276 < t ≤ .0394 Ra ≦ 13.8 µin
Rt ≦ 138 µin
.0394 < t ≤ .0689 Ra ≦ 15.7 µin
Rt ≦ 157 µin
Ra ≦ 13.8 µin
Rt ≦ 138 µin
Ra ≦ 11.8 µin
Rt ≦ 118 µin
Thickness t (in) Tensile Strength MPa Eberle Tolerance +/-
Range L Range M Range H
.0008 ≤ t < .0039 HV630 HV25
.0039 ≤ t < .0049 1800 2100 2300 50
.0049 ≤ t < .0069 1800 2050 2250 50
.0069 ≤ t < .0089 1750 2000 2200 50
.0089 ≤ t < .0108 1750 1950 2200 50
.0108 ≤ t < .0148 1700 1900 2150 50
.0148 ≤ t < .0167 1650 1850 2100 50
.0167 ≤ t < .0187 1600 1800 2050 50
.0187 ≤ t < .0207 1550 1750 2000 50
.0207 ≤ t < .0246 1550 1750 2000 50
.0246 ≤ t < .0285 1500 1700 1950 50
.0285 ≤ t < .0325 1500 1700 1950 50
.0325 ≤ t < .0364 1450 1650 1900 50
.0364 ≤ t < .0404 1450 1650 1900 50
.0404 ≤ t < .0453 1450 1650 1900 50
.0453 ≤ t < .0492 1400 1600 1850 50
.0492 ≤ t < .0531 1400 1600 1850 50
.0531 ≤ t < .0620 1400 1600 1850 50
.0620 ≤ t ≤ .0689 1350 1550 1800 50

 

Thickness t in Flatness deviation P
Class 1 Class 2 Class 3 Class 4
.0008 ≦ t < .0039 P60 P50 P40 P30
.0039 ≦ t < .0079 P50 P40 P30 P20
.0079 ≦ t < .0138 P45 P35 P25 P15
.0138 ≦ t < .0197 P40 P30 P20 P10
.0197 ≦ t ≦ .0689 P35 P25 P15 P10

P15 means maximum flatness deviation of  .0015 in per 1 in strip width.

Strip width w (in) Measured lenght (ft) Class 3 (in) Class 4 (in) Class 5 (in)
w < .591 1.6 .063 .031 .024
.591 ≤ w < 1.378 3.3 .071 .035 .024
10 .142 .071 .047
1.378 ≤ w < 4.921 3.3 .047 .024 .012
10 .094 .047 .024
4.921 ≤ w ≤ 9.843 3.3 .047

G0,6/3 means maximum straightness deviation of .024 in over a measuring length of 10 ft.

Grade Chemical Composition (percent nominal) Comparison of Norms
C Si Mn Cr DIN Material AISI
Eberle 18 1,00 0,25 0,40 C100S 1.1274 1095
KG, KE Slit
.079 ≤ w ≤ 9.843 in
Deburred
t < .026 in: .157 ≤ w ≤ 9.843 in
t ≥ .026 in: .157 ≤ w ≤ 5.906 in
K2 Bevelled
t ≥ .012 in
.394 ≤ w ≤ 5.906 in
Tip: s
Bevel angle: x
K3 Rectangular rounded
t ≥ .006 in
.236 ≤ w ≤ 5.906 in
Standard radiuses r
.006 ≤ t < .010 in : .0016 in
.010≤ t < .031 in : .0031 in
.031 ≤ t < .050 in : .0059 in
.050 ≤ t ≤ .069 in : .0078 in
K4 Rounded
t ≥ .0024 in
.157 ≤ w ≤ 5.906 in