NK KSC49 (Japan / NKK) Material Properties

Material group: Ferrous Alloys / Cast steels
Country/Standard: Japan / NKK

Data updates

Latest Update: 2021-12
Total number of updates: 2
Update History:
2019-05

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 240 MPa view details
Tensile Strength 480 MPa view details
Elongation, A 20 % view details
Reduction of Area val1
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% view details
Yield Strength, Rp0.2 34.8 ksi view details
Tensile Strength 69.6 ksi view details
Elongation, A 20 % view details
Reduction of Area val1
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% view details

Physical Properties

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Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.40
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.30
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.30
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Other total
VALUE
val1
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UNIT
%
CAS NUMBER
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

Rules for the Survey and Construction of Steel Ships, Part K - Materials, Chapter 5 Section 1; Castings; Steel Castings / Nippon Kaiji Kyokai (Class NK) / 2021

Heat Treatments

  • Castings are to be annealed, normalized, normalized and tempered, or quenched and tempered at proper stages of manufacturing process. The tempering temperature is to exceed 550°C.<br>Castings for components such as crankshafts and engine bedplates, where dimensional stability and freedom from internal stresses are important, are to be given a stress relief heat treatment. This is to be carried out at a temperature of not less than 550°C followed by furnace cooling to 300°C or lower.