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ISO/TR 15608 Material Groups

ISO/TR 15608 Material Groups

Material Group 51.2

Material group 51.2: Pure Titanium with 0,2 < O2 ≤ 0,25 %

These unalloyed titanium grades have an excellent corrosion resistance property, excellent weldability and is used in a wide variety of applications. The corrosion resistance of Titanium is due to a stable, protective, and strongly adherent oxide film layer. This film forms instantly when a fresh surface is exposed to air or moisture. This film growth is accelerated under strong oxidizing conditions. The Titanium oxide film is capable of healing itself instantly in the presence of moisture or oxygen. Because of this, Titanium applications are common in the fabrication of process equipment of chemical industries.

Features of Titanium pure Group 51.2 ISO/TR 15608

Grade 2:
Moderate strength unalloyed Ti with excellent weldability, cold formability, and fabricability; “workhorse” and “garden variety” Ti grade for industrial service with excellent resistance to mildly reducing to highly oxidizing media with or without chlorides. Approved for sour service use under the NACE MR-01-75 Standard.
This grade material is mainly used in chemical industries where the parts are subjected to very harsh environments.

Grade 7:
Most resistant Ti alloy to corrosion in reducing acids and localized attack in hot halide media, with physical/mechanical properties equivalent to Grade 2, and excellent weldability/fabricability.

Grade 16:
Lower cost, leaner Pd version of Grade 7 with equivalent physical/mechanical properties, and similar corrosion resistance.

Grade 26:
Lower cost, Ru-containing alternative for Grade 7 with equivalent physical/mechanical properties and fabricability and similar corrosion resistance.

Welding of Titanium pure Group 51.2 ISO/TR 15608

Commercially pure titanium and most titanium alloys are readily welded by a number of welding processes being used today. The most common method of joining titanium is the gas Tungstenarc (GTAW) process and secondarily is the gas metal-arc (GMAW) process. The techniques for welding titanium resemble those employed with nickel alloys and stainless steels. To achieve sound welds with titanium, primary emphasis is placed on surface cleanliness and the correct use of inert gas shielding.
An essential requirement for successfully arc welding titanium is proper gas shielding. Care must be taken to ensure that inert atmosphere protection is maintained until the weld metal temperature cools below 426°C (800°F).

Typical materials in group 51.2

Name / GradeNumberStandardProductRemarks
Ti 23.7035DIN 17851
2
2
2
WPT 2
F-2
2
2
R50400
R50400
R50400
R50400
R50400
R50400
R50400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate & Sheet
Smls. & welded tube
Bar
Smls. & welded fitting
Forgings
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
2H
2H
2H
F-2H
2H
2H
R50400
R50400
R50400
R50400
R50400
R50400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-381
ASTM B-861
ASTM B-862
Plate
Smls. & welded tube
Bar
Forgings
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Ti 73.7235DIN 17851
7
7
7
WPT 7
F-7
7
7
R52400
R52400
R52400
R52400
R52400
R52400
R52400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate & Sheet
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
7H
7H
7H
WPT 7H
F-7H
7H
7H
R52400
R52400
R52400
R52400
R52400
R52400
R52400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
16
16
16
WPT 16
F-16
16
16
R52402
R52402
R52402
R52402
R52402
R52402
R52402
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
16H
16H
7H
WPT 16H
F-16H
16H
16H
R52402
R52402
R52402
R52402
R52402
R52402
R52402
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
26
26
26
WPT 26
F-26
26
26
R52404
R52404
R52404
R52404
R52404
R52404
R52404
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
26H
26H
26H
WPT 26H
F-26H
26H
26H
R52404
R52404
R52404
R52404
R52404
R52404
R52404
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
PPlate
Smls. & welded tube
Bar
Smls. & welded fitting
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials

Material Group 23.1

Material Group 23.1 ISO/TR 15608 such as EN AW-6061:
Heat treatable aluminium-magnesiumsilicon alloys.

EN AW-6061 is a typical alloy in this Al-Mg-Si alloy material group. Generally Al-Mg-Si alloys are precipitation-hardened aluminium alloys. They are commonly available in pre-tempered grades such as 6061-T4/T6 with specified yield strength Rp0,2 > 240 MPa (T6).

The most common temper heat treatment (description in EN 515) for 6061 aluminium is:
T4: Naturally aged to a stable condition
T6: Solution heat treated, quenched and artificially aged

Welding of EN AW-6061 alloy.

Welding of The materials are good weldable with the conventional processes (MIG and TIG). When heat treatable aluminium welded, they lose significant amount of their mechanical properties in the heat affected zone (HAZ). If the base metal being welded is in T4 temper, much of the original strength can be recovered after welding by proper post-ageing. If the base metal is welded in the T6- temper, it can be solution heat treated an aged after welding which will restore it to the T6-temper. However, an post weld heat treating an aging may sous additional problems.

EN AW-6061 alloy , the strength of the original T4 or T6 tempers is reduced in the HAZ due the over-heating. Full re-hardening would require a complete solution heat treatment followed by quenching and artificial aging; as result, the welded assembly will most likely be strongly distorted. Partial re-hardening after weldings is possible up to about 40% of the parent strength.
Therefore, it is recommended,

  • to keep the energy input per unit length of weld as small as possible( to reduce width of HAZ)
  • to weld AlMgSi alloys in the T4 temper followed by age hardening of the complete assembly (if possible).

Applications for : Piping and high pressure gas storage cylinders. According to EN 602, the use of the EN AW-6061 material is allowed for the contact with food.

Applications of Al-Mg-Alloys such EN AW-6061 alloy

Al-Mg-Alloy EN AW-6061is suitable for the manufacture of pressure vessels and piping in accordance with EN 1392 “Aluminum and aluminum alloys – Wrought and cast products – Particular requirements for products for the fabrication of pressure equipment” see table below.

Table: Weldability and pressurised applications for aluminium alloy material group 23.1 in acc. to EN 1392:

MaterialCondition 1WeldabilityApplicationmin./max.
Working Temp.
EN AW-6060T42
T6
T8
yesPressure Vessel, Piping
Pressure Vessel, Piping
Pressure Vessel, Piping
-273/80 °C
-273/160 °C
-273/160 °C
EN AW-6061T4 2
T6
yesPressure Vessel, Piping
Pressure Vessel, Piping
-273/80 °C
-273/160 °C
EN AW-6082T4 2
T6
T8
yesPressure Vessel, Piping
Pressure Vessel, Piping
Pressure Vessel, Piping
-273/80 °C
-273/160 °C
-273/160 °C
1 In the “Material condition” column, T4 also applies to T451, T4511, T4510 etc. Similar extensions apply to the material states T3, T6, T73 and T8.
2 If the materials supplied in this condition are exposed to increased temperatures, they will show an increase in strength properties, but the elongation values will decrease.

Typical materials in group 23.1

Name / GradeNumberStandardProductsRemarks
EN AW-AlMgSi
EN AW-AlMgSi
EN AW-6060
EN AW-6060
EN 754
EN 755
Cold drawn rod/bar and tube
Extruded rod/bar, tube
EN 13445-8: No
EN 13480-8: Yes
EN AW-AlMg1SiCu
EN AW-AlMg1SiCu
EN AW-AlMg1SiCu
EN AW-6061
EN AW-6061
EN AW-6061
EN 485
EN 754
EN 755
Plate, sheet, stripe
Cold drawn rod/bar and tube
Extruded rod/bar, tube
EN 13445-8: No
EN 13480-8: Yes
EN AW-AlSi1MgMn
EN AW-AlSi1MgMn
EN AW-6082
EN AW-6082
EN 754
EN 755
Cold drawn rod/bar and tube
Extruded rod/bar, tube
EN 13445-8: No
EN 13480-8: No
6061
6061
6061
6061
6061
6061
6061
6061
6061
WP6061
6061
A96061
A96061
A96061
A96061
A96061
A96061
A96061
A96061
A96061
A96061
A96061
ASTM B-209
ASTM B-210
ASTM B-211
ASTM B-221
ASTM B-234
ASTM B-241
ASTM B-247
ASTM B-308
ASTM B-345
ASTM B-361
ASTM B-547
Plate & sheet
Smls. tube
Bar & rod
Bar & rod & shape
Smls. tube
Smls. pipe & tube
Forgings
Shape
Smls. pipe & tube
Fittings
Welded tube
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
6063
6063
6063
6063
WP6063
A96063
A96063
A96063
A96063
A96063
ASTM B-210
ASTM B-211
ASTM B-241
ASTM B-345
ASTM B-361
Smls. tube
Bar & rod
Smls. pipe & tube
Smls. pipe & tube
Fittings
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials

Material Group 52

Material Group 52 ISO/TR 15608: Titanium alpha alloys a

a Alloys covered by group 52 are:
Ti-0,2Pd, Ti-2,5Cu, Ti-5Al-2,5Sn, Ti-8Al-1Mo-1V, Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-2Nb-1Ta-0,8Mo;

Features of Grade 12

Highly weldable and fabricable Ti alloy offering improved strength and pressure code design allowables, hot brine crevice corrosion, and reducing acid resistance compared to Ti Grades 1, 2, and 3. Approved for sour service use under the NACE MR-01-75 Standard.

Typical materials in group 52

Name / GradeNumberStandardProductRemarks
11R52250ASTM B-265Plate & sheetASME BPVC
7
7
7
WPT 7
F-7
7
7
R52400
R52400
R52400
R52400
R52400
R52400
R52400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate & sheet
Smls. & welded tube
Bar
Smls. & welded … fittings
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
7H
7H
7H
WPT 7H
F-7H
7H
7H
R52400
R52400
R52400
R52400
R52400
R52400
R52400
ASTM B-265
ASTM B-338
ASTM B-348
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate & sheet
Smls. & welded tube
Bar
Smls. & welded … fittings
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
12
12
WPT 12
F-12
12
12
R53400
R53400
R53400
R53400
R53400
R53400
ASTM B-265
ASTM B-338
ASTM B-363
ASTM B-381
ASTM B-861
ASTM B-862
Plate & sheet
Smls. & welded tube
Smls. & welded fittings
Forging
Smls. pipe
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials

Material Group 38

ISO/TR 15608 Material Group 38:
Other Copper alloy (5 % or more other elements) not covered by groups 31 to 36)

Typical materials in group 38

NameNumberStandardProductUNS
CuMn11Al8Fe3Ni3-CCC212E-GSEN 1982
ASTM B-148
Sand castingC95700
CuSi4Zn4MnP-CCC245E
CuSi4Zn9MnP-CCC246E
Table: Typical materials

ISO/TR 15608 Material Group 6.3

ISO/TR 15608 Material Group 6.3: Cr-Mo-V Steels such as material no. 1.7779 with
3,5 % ≤ Cr < 7,0 %, Mo ≤ 0,7 % and 0,45 < V ≤ 0,55 % such as material no. 1.7779

Features of low alloyed Cr-Mo-V steel (2.25Cr–1Mo–V)

Hydrosteel CrMo (V) steels with 0.5 % V offer better performance for petrochemical reactors compared to 10CrMo9-10 steels that means the specified yield strength and creep properties for this material is a lot of better compared to 10CrMo9-10 steel.
Depending on the heat treatment, the yield strength of 20CrMoV13-5-5 steel is in the range of Rp0,2 = 520 – 640 MPa.

Applications for low alloyed Cr-Mo-V (20CrMoV13-5-5) steel

This material may be used in all applications requiring service conditions under high temperature and high pressure of hydrogen. Steel for hydrogen service an elevated temperature and pressure is stell that not readily susceptible to decarbusation by hydrogen at elevated pressures and temperatures and thus to hydrogen and grain boundary embitterment. This characteristic is achieved ba adding alloying elements that from carbides at the operating temperature.

Is particularly suitable for pressure equipment in high temperature hydrogen service (e.g. hydro treating reactors, exchangers, hydro treating reactors, hydro desulfurizers, hydro crackers)

Welding conditions for 20CrMoV13-5-5 steel

Welding needs precautions, in particular: tight control of preheat, interpass temperature intermediate stress relieving and post weld heating to avoid cold cracking;

Weld metal and HAZ in the as welded condition are susceptible to hydrogen induced cold cracking.

However, the risk of cold cracking is known to occur in the weld metal more frequently than in the HAZ. Therefore, a preheat and minimum interpass temperature of 200°C is recommended for thickness higher than 30 mm. After welding a Dehydrogenation Heat Treatment ≥ 300 °C is recommended. After welding, these steels generally have to be PWHT e.g. 700 -730 °C.

NameNumberStandardProductRemark
20CrMoV13-5-5
D, Cl. 4a
1.7779
K31835
EN 10216-2
ASTM A-542
Smls. tube
Forging
EN 13445-2 & EN 13480-2
ASME BPVC
Table: Typical materials

Material Group 41

ISO/TR 15608 Material Group 41 such as Nickel 200:
Pure nickel

Unalloyed nickel with a nickel concentration of at least 99.2%. Alloy 201 is the low carbon version of Alloy 200.
They are characterised by:

  • excellent resistance in alkaline media,
  • high ductility in a wide temperature range,
  • ferromagnetism,
  • high electrical and thermal conductivity.

Applications for Pure Nickel

Nickel 200 is used in the chemical industry for its corrosion resistance – particularly to alkalis. Nickel is used in a wide range of applications for food preparation and cooking. Tanks in which fluorine is produced and where it reacts with hydrocarbon (CFC) due to the material’s resistance against fluorine. Storage and transport of phenol. Production of hydrogen chloride and chlorination of hydrocarbons such as benzene, methane and ethane.

Typical materials in group 41

NameNumberStandardProductAlloyRemarks
Ni99.2







2.4066
N02200
N02200
N02200
N02200
N02200
N02200
N02200
N02200
DIN 17740
ASTM B-160
ASTM B-160
ASTM B-162
ASTM B-163
ASTM B-366
ASTM B-725
ASTM B-730
ASTM B-564

Bar
Seamless pipe and tube
Plate
Seamless tube
Fittings
Welded pipe
Welded tube
Forgings
Nickel 200
Alloy 200
Alloy 200
Alloy 200
Alloy 200
Alloy 200
Alloy 200
Alloy 200
Alloy 200
PMA required
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
EAM Nickel 201-1
EAM Nickel 201-2
EAM Nickel 201-3
EAM Nickel 201-4
LC-Ni99












2.4068
N02201
N02201
N02201
N02201
N02201
N02201
N02201
N02201
N02201
EAM 0879-1:2001/05
EAM 0879-2:2001/05
EAM 0879-3:2001/05
EAM 0879-4:2001/05
DIN 17740
ASTM B-160
ASTM B-161
ASTM B-162
ASTM B-163
ASTM B-366
ASTM B-725
ASTM B-730
ASTM B-751
ASTM B-564
Plate
Forging
Bar
Seamless tube

Bar
Seamless pipe and tube
Plate
Seamless tube
Fittings
Welded pipe
Welded tube
Tube
Forgings
Ni99,0-LC
Ni99,0-LC
Ni99,0-LC
Ni99,0-LC
Nickel 201
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
Alloy 201 Low C
EN 13445-10
EN 13445-10
EN 13445-10
EN 13445-10

ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials

Material Group 51.3

Material Group 51.3 ISO/TR 15608: Pure titanium with 0,25 < O2 ≤ 0,35 %

Features of Titanium pure Group 51.3 ISO/TR 15608

Grade 3:
Moderate strength unalloyed Ti with excellent weldability, cold formability, and fabricability. Slightly stronger version of Gr. 2 Ti with similar corrosion resistance with good weldability and reasonable cold formability/ductility.
This grade material is mainly used in chemical industries and power plant cooling system components where the parts are subjected to very harsh environments.

Welding of Titanium pure Group 51.3 ISO/TR 15608

Commercially pure titanium and most titanium alloys are readily welded by a number of welding processes being used today. The most common method of joining titanium is the gas Tungstenarc (GTAW) process and secondarily is the gas metal-arc (GMAW) process. The techniques for welding titanium resemble those employed with nickel alloys and stainless steels. To achieve sound welds with titanium, primary emphasis is placed on surface cleanliness and the correct use of inert gas shielding.
An essential requirement for successfully arc welding titanium is proper gas shielding. Care must be taken to ensure that inert atmosphere protection is maintained until the weld metal temperature cools below 426°C (800°F).

Typical materials in group 51.3

Name / GradeNumberStandardProductRemarks
Ti 33.7055DIN 17851
3
3
WPT 3
F-3
3
R50550
R50550
R50550
R50550
R50550
ASTM B-265
ASTM B-338
ASTM B-363
ASTM B-381
ASTM B-862
Plate & sheet
Smls. & welded tube
Fitting
Forgings
Welded pipe
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials

ISO/TR 15608 Material Group 3.2

ISO/TR 15608 Material Group 3.2: Quenched and tempered (QT) fine-grain high strength steels with a specific minimum yield strength ReH > 690 N/mm2.

What is the quenched and tempering (QT) process of high strength steels?

Quenching and tempering is a heat-treatment method for high strength low alloy steel. Quenching and tempering consists of a two-stage heat-treatment process. 
Stage 1 includes hardening, in which the plate is austenitised to approximately 900°C and then quickly cooled. The material is water-quenched in a quench unit, in which the plate is clamped to avoid warpage. 
Stage 2 consists of tempering the material to obtain the desired material properties. Quenching and tempering achieves an extremely fine-grained and homogeneous microstructure. Quenched and tempered steel is characterised by high strength and good ductility.

Weldability of high strength steels ISO/TR 15608 Material Group 3.2

The high-strength tempered materials are generally weldable. However, certain requirements must be met during welding with regard to heat input and controlled cooling in the heat-affected zone and the use of hydrogen-reduced weld metal

When welding high strength steels, it should be noticed that that a tempering effect occurs due to the heat input during welding, which influences the properties of the base material. The temperature-time cycles during welding have a significant effect on the mechanical properties of a welded joint and the heat effect zones. It is understood, that the t8/5-time is sufficient to describe the temperature-time characteristics. t8/5 is the cooling time from 800°C to 500°C and describes the cooling conditions of an individual weld pass for the weld metal and the corresponding heat affected zone (HAZ). t8/5 depends on the heat input during welding, the plate temperature (or interpass temperature), the shape factor (geometry) and on plate thickness if two dimensional heat flow occurs which is generally the case for thin plates. To achieve satisfactory weld metal properties the welding parameters must be limited with increasing yield strength. For example acceptable properties for an P960QL steel are normally obtained with cooling times between 5 s and 20 s. For lower cooling times the hardness of the heat affected zone may exceed limiting values with the risk of introducing cracks.

The hydrogen content of the consumables H2 has a significant influence on the preheating temperature. In order to reduce the risk of hydrogen-induced cracking the preheating temperature must be increased with growing hydrogen content.

Flame straightening of high strength steels ISO/TR 15608 Material Group 3.2

The maximum recommended temperatures for flame straightening is usually 550°C for quenched and tempered steels.

Quenched and tempered (QT) fine-grain steels with a specific minimum yield strength 460 < ReH ≤ 690 N/mm2see Group 3.1

Typical materials in group 3.2

Name / GradeNumberStandardProductRemarks
S700MC1.8974EN 10149-2Platefor cold forming
S900MC1.8798EN 10149-2Platefor cold forming
S690MC1.8799EN 10149-2Platefor cold forming
S890Q1.8940EN 10025-6Platestructural steels
S890QL1.8983EN 10025-6Platestructural steels
S890QL11.8925EN 10025-6Platestructural steels
S960Q1.8941EN 10025-6Platestructural steels
S960QL1.8933EN 10025-6Platestructural steels
A, Cl. 1
A, Cl. 2
A, Cl. 3
K12521
K12521
K12521
ASTM A-533
ASTM A-533
ASTM A-533
Plate
Plate
Plate
ASME BPVC
ASME BPVC
ASME BPVC
J100K12521ASTM A-672Fusion welded pipeASME BPVC
Table: Typical materials

Read More

ISO 15614-1: Which range of material groups according to ISO/TR 15608 are qualified?

What are designations for materials such as EN-Material No., Grade, AISI, or UNS?

What are HIC resistant steels?

Material Group 71

Material Group 71 ISO/TR 15608: Grey cast irons with specified tensile strength or Brinell hardness

Typical materials in group 71

NameNumberStandardsRemarks
EN-GJL-150EN-JL1020EN 1561
EN-GJL-200 EN-JL1030EN 1561
EN 12516-4
EN 12953: Valve DN ≤200, PS≤13 bar, TS≤220°C
EN-GJL-250EN-JL1040EN 1561
EN 12516-4
EN 12953: Valve DN ≤200, PS≤13 bar, TS≤220°C
EN-GJL-300EN-JL1050EN 1561
EN-GJL-350EN-JL1060EN 1561
EN-GJL-HB155EN-JL2010EN 1561
EN-GJL-HB175EN-JL2020EN 1561
EN-GJL-HB195EN-JL2030EN 1561
EN-GJL-HB215EN-JL2040EN 1561
EN-GJL-HB235EN-JL2050EN 1561
EN-GJL-HB255EN-JL2060EN 1561
Table: Typical materials

ISO/TR 15608 groups materials according to their similar properties such as chemical composition, weldability and mechanical properties. However, it can also be used for other applications such as NDE, forming or heat treatments.

Material assigned to a group in ISO/TR 20172 (European Materials), ISO/TR 20173 (American Materials) and ISO/TR 20174 (Japanese Materials) should considered to those groups.

ISO/TR 15608 material groups reduces the number of welding procedure qualifications (WPQR) e.g. ISO 15614-1. One WPQR is required for a single material group, whereby this material group can contain several specific materials (see tables below). For example, A WPQR with a material from subgroup 1.2 includes all materials from the subgroup 1.1

ISO/TR 15608 is included in many codes and standards so that this simplification of welding qualifications can be used there e.g. EN 13445-2, EN 13480-2, AD 2000, PD 5500, EN 1092-2, ISO 9606-1 to 5.

ASME BPVC Section X has a similar group classification (P-number), but cannot be adopted 1:1. The American system similarly classifies materials into groups, however ASME BPVC Sect. IX in QW422 explicitly classifies grades of materials to groups and not on the chemical composition and mechanical properties such as is the case with ISO/TR 15608.

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