|
Typical analysis
%
|
|
C
.04
|
Si
.50
|
Mn
.50
|
Cr
14.75
|
|
Ni
4.50
|
Cu
3.20
|
Cb
.25
|
|
|
|
Delivery
condition
|
Prehardened to 38-42RC
Hardness is Uniform
|
|
Color code
|
Gold
|
Ultrachem ESR® is a
chromium-nickel precipitation-hardening stainless steel, a modified PH alloy
grade, which is characterized by
- Exceptional
polishability
- Exceptional corrosion
resistance
- Uniform hardness in all
dimensions
- Excellent compressive
strength
- Simple low temperature
heat treatment with small dimensional change
- Good weldability
- Excellent toughness
- Excellent EDM
machinability
Ultrachem ESR® is
normally supplied in a fully heat treated condition, age hardened to 38 or 42
HRC. Age-hardening has a number of advantages:
- distortion is virtually
eliminated—only a small, predictable shrinkage is experienced (approx.
0.0005 in. per in.)
- uniform hardness
throughout thick sections, with minimum risk of cracking
- no scale or
decarburization of the part
Ultrachem ESR®'s
excellent corrosion resistance reduces both maintenance costs and production
costs. Consistently high molding productivity is assured since cooling channels
are not subjected to corrosion and loss of cooling efficiency.
Ultrachem ESR® is
particularly suitable for applications where high surface finishes are
required. It is also recommended for use in long-life molds subjected to severe
working conditions, including corrosive materials and atmospheres, high
stresses and indentation experienced in today's fast cycling molding
operations.
Ultrachem ESR® is
recommended for plastics and rubber molds requiring high surface finishes.
Ultrachem ESR® provides a complete stainless mold with total
corrosion resistance.
|
PHYSICAL DATA
Pre-hardened to 321 HB.
Data at room and elevated temperatures.
|
Temperature
|
68°F
(20°C)
|
390°F
(200°C)
|
750°F
(400°C)
|
|
Density
kg/m3
lbs/in3
|
7800
.284
|
7750
.282
|
7700
.280
|
|
Modulus
of elasticity
N/mm2
psi
|
196,000
28.5X10-6
|
185,000
27.0X10-6
|
174,400
25.4X10-6
|
|
Coefficient of thermal expansion
/°C from 20°C
/°F from 68°F
|
-
-
|
10.8X10-6
6.0X10-6
|
11.7X10-6
6.5X10-6
|
|
Thermal
conductivity
W/m °C
Btu in/(ft2h°F)
|
112
|
129
|
149
|
|
Specific heat
J/kg °C
Btu/lb °F
|
460
0.110
|
-
-
|
-
-
|
Impact
Strength
Age-hardened condition at
42 HRC. Data at room and elevated temperatures.
|
Testing temperature
68°F (20°C)
|
ft/lbs
|
joules
|
|
Impact strength
|
25
|
30
|
Tensile
strength
Typical values. Age
hardened condition at 42 HRC.
|
Testing temperature
68°F (20°C)
|
p.s.i
|
N/mm2
|
|
Tensile strength
|
190,000
|
1310
|
|
Yield strength
|
175,000
|
1208
|
|
Reduction of
area
|
50%
|
|
Elongation in
2"
|
14%
|
Weld overlays of worn areas
and repair welds up to 1" deep can be made on Ultrachem
ESR® in the aged condition using shielded metal arc welding with
W17-4 PH electrodes. In contrast to other die holder block steels no preheating
is required to produce sound welds in Ultrachem ESR® regardless
of its pre-weld condition. However, welds should be stress relieved at
900°F for ½ hour, air cool to below 90°F for 4 hours.
STOCK—Sizes up
to 8" thickness. Precision sizes can be cut to your
specifications.
SERVICES—Saw
cutting, Blanchard grinding up to 120" diameter and surface grinding up to
40" x 192".
|
