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8/12/2019 25-35NB Datasheet - Rev 17
http://slidepdf.com/reader/full/25-35nb-datasheet-rev-17 1/2
Petrochemical Products Group Pevely, Missouri Waukesha, WisconsinPhone 636-479-4499 Phone 262-544-7705Fax 636-479-3399 Fax 262-544-7884
25-35Nb is a niobium strengthened modification of 25-35 (HP) with enhanced stressrupture properties and weldability. Superior rupture strength is achieved throughutilization of state-of-the-art foundry practices. The Petrochemical Products Groupmanufactures several 25-35Nb variations with chemistries and properties designed forspecific customer applications.
25-35NbIssue: 17Date: 7 Feb 0
DATA SHEET
25-35Nb
Description
Chemical Composition Range
Mechanical Properties
Element (%) C Mn Si Cr Ni Nb Mo Fe
Minimum 0.35 — — 23.0 32.0 0.60 — Bal
Maximum 0.55 1.50 2.00 27.0 37.0 1.00 0.50 Bal
*Calculations based on 95% confidence limit.
TENSILE PROPERTIES
Minimum
Temperature °F
°C
7021
7021
1600870
20001093
Tensile Strength ksiMPa
65.0448
79.0545
25.0172
9.062
Yield Strength ksiMPa
33.0227
38.0262
18.0124
8.055
Elongation % 8 (Centrifugal)6 (Static Cast)
16 26 40
Typical
Minimum Stress toProduce Rupture
°F°C
1600870
1700927
1800980
19001040
10,000 hours ksiMPa
6.2543.1
4.3630.1
2.7318.8
1.5310.5
100,000 hours ksiMPa
4.8033.1
3.0220.9
1.6911.7
0.845.8
STRESS-RUPTURE PROPERTIES*
8/12/2019 25-35NB Datasheet - Rev 17
http://slidepdf.com/reader/full/25-35nb-datasheet-rev-17 2/2
1
10
100
1
10
100
30 31 32 33 34 35 36 37 38 39 40
30 31 32 33 34 35 36 37 38 39 40
S t r e s s ( M P a )
LMP = T (23.0 + log t) / 1000
1 k s i = 6 . 8
9 5 M P a
LMP = Larson-Miller parameter
T = TemperatureoK (
oC +273.15)
t = Hours to rupture
Average
Minimum
(95% Confidence)
Petrochemical Products Group
Physical Properties
8600 Commercial BoulevardPevely, Missouri 63070-1528Phone 636-479-4499 Fax 636-479-3399
CARONDELET CORPORATION
905 East St. Paul AvenueWaukesha, Wisconsin 53188-3898Phone 262-544-77005 Fax 262-544-7884
Wisconsin entrifugal
©2001 MetalTek International
25-35NbIssue: 17Date: 7 Feb 02
Density: 0.285 lb/in3 (7.90 g/cm
3 )
Melting Point: 2450°F (1343°C)
Temperature Conductivity
212°F (100°C) 80 BTU-in/ft2/hr/°F (11.5 W/m°C)
1600°F (870°C) 170 BTU-in/ft2/hr/°F (24.6 W/m°C)
2000°F (1093°C) 200 BTU-in/ft2/hr/°F (28.9 W/m°C)
Thermal Conductivity:
Temperature Coefficient
70-1600°F (21-870°C) 10.0x10-6
in/in/°F (18.0x10-6
m/m/°C)
1600-1800°F (870-980°C) 10.3x10
-6
in/in/°F (18.5x10
-6
m/m/°C)1800-2000°F (980-1093°C) 10.6x10-6 in/in/°F (19.1x10-6 m/m/°C)
Thermal Expansion:
Larson-Miller Creep-Rupture Curve