Material No.: K 31918

DescriptionChemical
composition
Physical
mechanical
properties
Temparature
information
StandardsProcess
information
Application
Certification
ProductsAll

Description

EN symbol (short)12 Ni14
Material No.1.5637
Density kg/dm37,85
Hardness (HB)
CompositionChrome-molybdenum alloyed heat treatable steel
CategoryTough at subzero steels
Structure

Chemical Composition

 CMnPSSiNiVCr+Mo+ Cu
K 31918Min % 0,31  0,183,18  
Max %0,190,640,0250,0250,373,82  
1.5637Min % 0,30   3,25  
Max %0,150,800,0200,0100,353,750,050,50

Physical properties

PropertyValue
Density: kg/dm37,85
Hardness: (HB)---
Permeabilität bei 20°C---
Temperature T
°C/F
(°C/F)
Specific heat
J / kgK
(Btu / lb °F)
Thermal conductivity
W/mK
(Btu·in / ft2·h·°F)
Electric resistance
µΩ · cm
(Ω circ mill / ft)
Modulus of elasticity
kN/mm2
(103 ksi)
Expansion rate from 70°F bis T
10-6 / K
(10-6 / °F)
20 /4 36 (--) 207 (--) 
-25 / -13 34 (--) 210 (--)11 (--)
-50 /-58 33 (--) 211 (--)11 (--)
-100 /-148 31 (--) 214 (--)10 (--)
-150 / -238 28 (--) 216 (--)10 (--)
TemperatureTensile strenght

In low temperatures
tensile elastic limit
In low temperatures
Elongation A5

In low temperatures
° C / ° FN/mm2 /ksiN/mm2 /ksi%
- 20 / -4460 / 66,7365 / 52,920
- 50 / -58490 / 71,0385 / 55,820
- 80 /-112520 / 75,4410 / 59,419
-120 / -184580 / 84,1450 / 65,218
ksi value calculated

Mechanical properties (20°C / 68°F)

0,2% Yield strength Rp0,2 (Mpa)/ksi>= 345 />=50,0
Tensile strenght Rm (Mpa) /ksi440-620 /63,8 - 89,9
Elongation A5 (%)>=22/ >=20lengthwise/transverse
impact work ( ISO-V/Charpy V)>= 45- >= 65lengthwise/transverse

Temparature information

Application area
Operation temperature-148 ºF  to 572 ºF 
Hardness
Working temperature1508 ºF  to 1598 ºF 
Explanation reportcooldown :water ,oil
Solution heat treatment
Working temperature2012 ºF  to 1562 ºF 
Tempering
Working temperature1076 ºF  to 1184 ºF 
Explanation reportcooldown:water /
Processing informationsair
Normalizing
Working temperature1526 ºF  to 1616 ºF 
Explanation reportcooldown : water/air

Standards / information

StandardsDesciption
ASTM A 333Standard Specification for Seamless and Welded Carbon and Alloy -Steel Tubes for LOW -Temperature Service

Process information

Main fields of application

Details of application
Certifications
machine buildingKältemaschinen (bis -100°C)
Apparatus engineering

Range of products

Product typeProduct
Plates / Sheetsplates/sheets
plate/sheet cuts
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Other Fittings a.o. Weldolets, Nipples
Pipes / Tubeswelded pipes/tubes
seamless pipes/tubes
Bar steelflat steel
section steel
round bar steel

Liability exclusion

All aforementioned specifications serve as a general orientation and have to be reviewed depending on the conditions of use.
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