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ISO/TR 15608 ISO/TR 15608 Material Group 5.3

ISO/TR 15608 Material Group 5.3 ISO/TR 15608 Cr-Mo steels (free of vanadium) with C ≤ 0,35 %, 3,5 % ≤ Cr < 7,0 % and 0,4 < Mo ≤ 0,7 %;

Features material Cr-Mo in ISO/TR 15608 Material Group 5.3

This Material group are creep and heat resistant special structural (5Cr–0.5Mo) steels with ferrite–martensite microstructure. Creep resistance steels (well-known as CrMo steels), contain strong carbide and/or nitride forming elements. These are intended to provide a fine dispersion of precipitates that both increase the tensile strength and prevents the formation of the voids. Also, this increase the hardenability (the ability to form martensite).

It is mainly used in boiler and apparatus construction for boiler drums and pressure vessels. The materials are suitable for temperatures up to 550°C (590°C).

Applications for creep and heat resistant steels (5Cr–0.5Mo

Industries that operate equipment under high temperatures can benefit from using chromium molybdenum alloys for boiler, apparatus construction and pressure vessels. for high temperature service These include power stations, energy, oil and gas, chemical, and metal production industries. These materials are often used as the base metal for clad components.

Weldability of Cr-Mo steels ISO/TR 15608 Material Group 5.3

The chromium-molybdenum alloyed heat-resistant steels are generally welded with a preheating suitable for the steel grade and wall thickness in question e.g. min. 200 °C and max. interpass 350 °C. After welding, these steels generally have to be PWHT e.g. 730 – 760°C.

Name/GradeNumberStandardProductRemarks
GX15CrMo51.7365EN 10213CastingEN 13445-2 & EN 13480-2
X16CrMo5-11.7366EN 10222-2ForgingEN 13445-2 & EN 13480-2
X12CrMo5
X11CrMo5
X11CrMo5
X11CrMo5
F5
T5
T5
WP5, Cl. 1
WP5, Cl. 3
P5
F5
FP5
5, Cl. 1
5, Cl. 2
5CR, Cl. 1
5CR, Cl. 2

T5c
P5c
1.7362
1.7362+I
1.7362+N1&N2
1.7362
K41545
K41545
K41545
K41545
K41545
K41545
K41545
K41545
K41545
K41545
K41545
K41545

K41245
K41245
EN 10028-2
EN 10216-2
EN 10216-2
EN 10253-2
ASTM A-182
ASTM A-199
ASTM A-213
ASTM A-234
ASTM A-234
ASTM A-335
ASTM S-336
ASTM A-369
ASTM A-387
ASTM A-387
ASTM A-691
ASTM A-691

ASTM A-213
ASTM A-335
Plate
Seamless tube
Seamless tube
Fitting
Forging
Smls. tube
Smls. tube
Fitting
Fitting
Smls. pipe
Forging
Forging pipe
Plate
Plate
Fusion welded pipe
Fusion welded pipe

Smls. tube
Smls. pipe
EN 13445-2 & EN 13480-2
EN 13445-2 & EN 13480-2
EN 13445-2 & EN 13480-2
EN 13445-2 & EN 13480-2
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
C5
CP5
J42045
J42045
ASTM A-217
ASTM A-426
Casting
Centrifugal cast pipe
ASME BPVC
ASME BPVC
F5a
F5A
K42544
K42544
ASTM A-182
ASTM A-336
Forging
Forging
ASME BPVC
ASME BPVC
T5b
P5b
K51545
K51545
ASTM A-213
ASTM A-335
Smls. tube
Smls. pipe
ASME BPVC
ASME BPVC
Table: Typical materials