TAM Plus: According To EN 10297-1
TAM Plus: According To EN 10297-1
TAM Plus: According To EN 10297-1
According to EN 10297-1
Tenaris
Broome
Rio das Ostras
Confab
Rio de Janeiro Maputo
2
TAM®Plus
REFERENCE NORM EN 10297-1
SEAMLESS STEEL TUBES WITH HIGH MACHINABILITY (HL)
AND CLOSE TOLERANCES FOR MECHANICAL APPLICATIONS
TAM® Plus is the new range of hot rolled Therefore a product with re-sulfured steel,
mechanical tubes, designed by Tenaris to better close tolerances and good and, on request,
meet the needs of industrial sector. improved straightness improved (1‰ cumulative
on the total tube length) was defined.
The new product, which is part of the TAM®
family Mechanical Application Tubes, is the Within the production process a fusion
result of an extended R&D experience and of a and casting procedure was set up to obtain
fully-integrated manufacturing process. the minimum inclusion level, with uniform
distribution of sulfur, to improve steel
Following a research carried out by the technical machinability.
assistance area in various application field,
among which cylinders, rollers, bushing, Thanks to the Diescher mill in our production
connectors and gears, the need for a product unit located in Arcore in Italy, TAM® Plus
having higher characteristics than the standard is the most suitable product for mechanical
came to light. applications in Outer Diameter 48 – 219,1 mm
Focus emerged in the following areas: dimensional range.
• Machinability (HL)
• Dimensional tolerances
• Straightness (upon request)
Objective of the project was to control:
• The metallurgical characteristics
• Production process for a family of steel
suitable for machine tool working.
Production
technology
TAM® Plus is produced from fine grain alloy In producing TAM® Plus tubes, the technology
steel with guaranteed soluble aluminum and of the Arcore plant plays a key role:
controlled sulfur contents (0.020-0.035).
• Piercer mill
The Electromagnetic Stirrer (EMS) allows • Diescher mill
obtaining an homogeneous structure of the bar
and the lowering of the segregation index and The piercer mill is the machine that transforms
central cavity porosity (Fig 1/Fig 2). – at high temperature – the primary material
(round bar from continuous casting) into a
Furthermore, the automatic control of the hollow with heavy wall thickness and good
continuous cast parameters allow better process concentricity.
control and steel quality.
FIG 1
IMPRINT BAUMAN (NOT EMS)
FIG 2
IMPRINT BAUMAN (WITH EMS) TENARISDALMINE’S STEEL SHOP AERIAL VIEW
The Diescher ADVANTAGES OF THE DIESCHER MILL:
mill, by means • Tube concentricity
of transverse • Wide wall thickness dimensional range
rolling, permits
a hollow of After the Diescher Mill, the finished diameter
lower wall of the tube is defined:
thickness and
even better • For the dimensional range 48.3 – 92.3 tubes
concentricity to pass through an intermediate heating furnace
be obtained. and then to the stretch reducing mill (SRM)
that can also strictly control the variation of
the wall thickness;
• For the dimensional range 95.4 – 219,1 tubes
The diameter of the hollow is defined by means are brought directly to the required diameter
of the positioning of the rolling cylinders and by a sizing mill, without any significant
the guiding discs; wall thickness is defined by variation in wall thickness.
the position of the cylinders and the internal
mandrel.
• Machinability (HL)
• Close tolerances on diameter
and wall thickness
• Tight straghtness (upon request)
MACHINABILITY
Machinability is determined by two factors: Tenaris, in its R&D laboratories neutralized the
undesirable alumina in the steel and added
CONDITION OF MATERIALS controlled quantities of sulfur, an element
• Chemical and mechanical properties able to form manganese sulphide. Sulfur
• Heat treatment method and relevant acts as a lubricant between tool and chip
microstructure surface, facilitating machinability, while the
• Inclusion rate high softening temperature of the manganese
• Surface condition sulphide makes the steel suitable for use at high
cutting speeds. Machinability of Tenaris steel is
WORKING CONDITIONS measured by:
• Cutting speed
• Cutting depth TOOL LIFE TESTS
• Feed rate With a tool life conventionally fixed at 10
• Type of cutting edge, tool holder, machine minutes, laboratory tests have demonstrated
that steel that has undergone re-sulfurisation is
Manganese sulphide inclusions present in the more machinable compared to standard steel,
steel, slow down the cutting edge wearing out permitting greater machining speeds.
and favor chip breaking (the opposite of using
steel with calcium aluminate inclusions or CHIP FORMATION TESTS
other refractory materials, which are hard and Formation of short, detached chips guaranteed
abrasive). by the use of re-sulphured steel allows high
machining speeds with consequent reduction
in time and production costs.
CHIP SHAPES
1. Ribbon chip 2. Tubular chip 3. Spiral chip 4. Helical chip 5. Helical chip 6. Arc chip 7. Discontinuous 8. Needle chip
of conical of conical chip
type type
1.1 Long 2.1 Long 3.1 Flat 4.1 Long 5.1 Long 6.1 Attached
1.2 Short 2.2 Short 3.2 Conical 4.2 Short 5.2 Short 6.2 Detached
TAM® Plus
Standard
E470 HL Steel for high machinability and high yield mechanical applications
E420J2 HL Steel for high machinability mechanical applications with guaranteed toughness
42CrMo4 HL Steel for high machinability mechanical applications for quench and tempering
16MnCrS5 HL Steel for high machinability mechanical applications for quench and case hardening
20MnCrS5 HL** Steel for high machinability mechanical applications for quench and case hardening
* HL = High machinability
** Chemical composition according to EN 10084-1
Note: C45E HL, 42CrMo4 HL, 16MnCrS5 HL e 20MnCrS5 HL can be provided rough (+AR), normalized (+N) and annealed (+A).
CHEMICAL ANALYSIS* %
GRADE C MN SI P S NI V CR MO AL TOT NB TI
E470 HL 0,16 ÷ 0,22 1,30 ÷ 1,70 0,10 ÷ 0,50 ≤ 0,030 0,020 - 0,035 0,08 ÷ 0,15 ≥ 0,010 ≤ 0,070
E420J2 HL 0,16 ÷ 0,22 1,30 ÷ 1,70 0,10 ÷ 0,50 ≤ 0,030 0,020 - 0,035 ≤ 0,40 0,08 ÷ 0,15 ≤ 0,30 ≤ 0,80 ≥ 0,010 ≤ 0,070 ≤ 0,050
42CrMo4 HL 0,38 ÷ 0,45 0,60 ÷ 0,90 ≤ 0,40 ≤ 0,035 0,020 - 0,035 0,90 ÷ 1,20 0,15 ÷ 0,30
16MnCr5 HL 0,14 ÷ 0,19 1,0 ÷ 1,30 ≤ 0,40 ≤ 0,025 0,020 - 0,040 0,80 ÷ 1,10
20MnCrS5 0,17 ÷ 0,22 1,10 ÷ 1,40 ≤ 0,40 ≤ 0,025 0,020 - 0,040 1,00 ÷ 1,30
MECHANICAL PROPERTIES
GRADE DELIVERY TENSILE PROPERTIES IMPACT TEST**
** The impact test values indicated are meant to be calculated as the average of the three samples of width W = 10 mm. One individual value may be below the minimum,
but not less than 70% of that value.
The certificate reports the dimension of the sample and the values measured in the test in J. If the sample width W is less than 10 mm, the minimum requested KV10 values
are reduced in the new KVW value according to the formula: KVW=KV10 x (W/10)
OPTION C
Specific additional tests can be agreed at the
time of the order.
SURFACES
The product is supplied with hot finished surfa-
ces, as rolled.
CERTIFICATION
The product is supplied with 3.1 inspection
certificate, in conformity with EN 10204.
48,3 48,3
51,2 51,2
52,5 52,5
54 54
66,8 66,8
70 Tolerance O.D. 70
≤80 ± 0,4 mm
71,4 71,4
>80 ± 0,5%
73 73
74,5 74,5
76,2 76,2
79,4 79,4
80,4 80,4
81,4 81,4
82,5 82,5
85,4 85,4
86,4 86,4
87 87
88,9 88,9
91,2 91,2
92,3 92,3
95,4 95,4
96,2 96,2
98,4 98,4
100,5 100,5
101,6 101,6
103,5 103,5
106,6 106,6
108 108
111,6 111,6
112,6 112,6
114,3 114,3
116,6 116,6
118,6 118,6
120,8 120,8
121,6 121,6
125,3 125,3
126,8 126,8
132 132
133,2 133,2
134,5 134,5
139,7 139,7
141,3 141,3
142 142
146 146
150,8 150,8
152,2 152,2
153,6 153,6
157,1 157,1
159 159
160,8 160,8
162,1 162,1
165 165
168,3 168,3
171,5 171,5
172,3 172,3
175,9 175,9
177,8 177,8
180,9 180,9
182,2 182,2
184,2 184,2
187,3 187,3
190,5 190,5
192,3 192,3
193,7 193,7
196,9 196,9
203 203
214,1 214,1
DIAMETER
215,9 215,9
219,1 219,1
Tenaris technicians are at your disposal in order to point the dimension of initial tube that guarantees achievement of finished size after mechanical working
All thicknesses can be continuously produced
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Tenaris has produced this catalogue for general information only. While every effort has been made to ensure the accuracy of the information contained within this
publication, Tenaris does not assume any responsibility or liability for any loss, damage, injury resulting from the use of information and data herein. Tenaris products and
services are only subject to the Company¹s standard Terms and Conditions or otherwise to the terms resulting from the respective contracts of sale, services or license, as the
case may be. The information in this publication is subject to change or modification without notice. For more complete information please contact a Tenaris’s representative or
visit our website at www.tenaris.com. This catalogue supersedes TAM®. Version 04 September 2013. ©Tenaris 2017. All rights reserved.