DIN 50125

14
DIN 50125:2009-07
Contents
Page
Foreword......................................................................................................................................................... 3
1
Scope ................................................................................................................................................. 4
2
Normative references ....................................................................................................................... 4
3
Terms and definitions ...................................................................................................................... 4
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
Types, dimensions, and designation.............................................................................................. 4
General............................................................................................................................................... 4
Type A test pieces ............................................................................................................................ 6
Type B test pieces ............................................................................................................................ 7
Type C test pieces ............................................................................................................................ 8
Type D test pieces ............................................................................................................................ 9
Type E test pieces........................................................................................................................... 10
Type F test pieces........................................................................................................................... 11
Type G test pieces .......................................................................................................................... 12
Type H test pieces .......................................................................................................................... 13
5
Marking ............................................................................................................................................ 13
Bibliography ................................................................................................................................................. 14
2
DIN 50125:2009-07
Foreword
This standard has been prepared by Working Committee NA 062-01-42 AA •Zug- und Duktilitätsprüfung für
Metalle! of the Normenausschuss Materialprüfung (Materials Testing Standards Committee).
DIN EN ISO 6892-1 lays down general specifications regarding tensile test piece shapes. More detailed
examples of tensile test piece shapes may be given in product standards.
For this reason Working Committee NA 062-01-42 AA felt it was important that DIN 50125 (which applies to
tensile test piece shapes in Germany) remains valid to facilitate the manufacturing of such test pieces in the
factory or workshop. This edition of the standard specifies examples of tensile test piece shapes which meet
the overall conditions specified in DIN EN ISO 6892-1.
Amendments
The following amendments have been made to DIN 50125:2004-01:
a)
Tolerances on dimensions and shape have been harmonized with DIN EN ISO 6892-1.
b)
Symbols have been harmonized with DIN EN ISO 6892-1.
c)
The transition radius, parallel length, and total length of test pieces have been harmonized with
DIN EN ISO 6892-1.
Previous editions
DIN DVM 125 = DIN 50125: 1940-08, 1951-04, 1986-03, 1991-04, 2004-01
DIN 50125-1 Corrigendum 1: 2004-07
3
DIN 50125:2009-07
1
Scope
This standard lays down specifications for test pieces which can be used for tensile testing metallic materials
in accordance with DIN EN ISO 6892-1.
The standard serves to facilitate the manufacture of tensile test pieces in the factory or workshop.
NOTE
The tensile test pieces specified here are examples of test pieces which meet the standard conditions laid
down in DIN EN ISO 6892-1. Test pieces which deviate from the examples given here, but which meet the requirements of
DIN EN ISO 6892-1, are also deemed to be in compliance with this standard.
2
Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
DIN EN ISO 6892-1, Metallic materials • Tensile testing • Part 1: Method of test at room temperature
3
Terms and definitions
For the purposes of this standard the terms and definitions in DIN EN ISO 6892-1 apply.
4
4.1
Types, dimensions, and designation
General
The tolerances specified in Table 1 shall apply to test pieces as specified in 4.2 to 4.6 and 4.9.
4
DIN 50125:2009-07
Table 1 • Tolerances on dimension and shape relating to the transverse dimensions of test pieces
Dimensions in millimetres
Designation
Test piece
width
Nominal
transverse
dimension
3
Diameter of machined test pieces
of circular cross-section (types A,
B, C, D) and
transverse dimensions of test
pieces of rectangular crosssection machined on all four sides
(type E)
0,03
0,03
0,04
0,05
0,04
0,10
0,05
0,02
0,03
0,03
0,04
0,05
0,06
0,10
0,12
0,15
0,15
12,5
0,05
0,06
20
0,10
0,12
>6
!
10
> 10
18
30
3
6
>6
10
!
> 10
18
> 18
30
> 30
50
Dimensions of test pieces taken
from flat products (type H)
Tolerance
on shapeb
0,02
6
> 18
Transverse dimensions of test
pieces of rectangular crosssection machined on only two
opposite sides
Tolerancea
a
These tolerances are applicable if the nominal value of the original cross-sectional area So is to be included in the calculation
without having to measure it. If these machining tolerances are not complied with, it is essential to measure every individual test
piece.
b
Maximum deviation between the measurements of a specified transverse dimension along the entire parallel length Lc of the test
piece.
5
DIN 50125:2009-07
4.2
Type A test pieces
Key
do
test piece diameter
Lo
original gauge length (Lo = 5 do)
d1
diameter of gripped ends ( 1,2 do)
length of gripped ends
Lc
parallel length (Lc
Lt
total length of test piece
h
Lo + do)
Figure 1 ! Type A test piece, of circular cross-section, with smooth, cylindrical ends
for clamping in wedge grips
Designation of a type A test piece with a diameter do = 12 mm and original gauge length Lo = 60 mm:
Tensile test piece DIN 50125 " A 12 × 60
Table 2 ! Examples of dimensions for type A test pieces
Dimensions in millimetres
do
6
Lo
d1
r
min.
h
min.
Lc
min.
Lt
min.
4
20
5
3
16
24
60
5
25
6
4
20
30
74
6
30
8
5
25
36
92
8
40
10
6
30
48
115
10
50
12
8
35
60
138
12
60
15
9
40
72
162
14
70
17
11
45
84
186
16
80
20
12
50
96
210
18
90
22
14
55
108
233
20
100
24
15
60
120
255
25
125
30
20
70
150
310
DIN 50125:2009-07
4.3
Type B test pieces
Key
do
test piece diameter
Lo
original gauge length (Lo = 5 do)
d1
diameter of ISO metric thread
Lc
parallel length (Lc
h
length of gripped ends
Lt
total length of test piece
Lo + do)
Figure 2 ! Type B test piece, of circular cross section, with threaded ends
Designation of a type B test piece with a diameter do = 14 mm and original gauge length Lo = 70 mm:
Tensile test piece DIN 50125 " B 14 × 70
Table 3 ! Examples of dimensions for type B test pieces
Dimensions in millimetres
do
Lo
d1
r
h
Lc
Lt
min.
min.
min.
min.
4
20
M6
3
6
24
41
5
25
M8
4
7
30
51
6
30
M10
5
8
36
60
8
40
M12
6
10
48
77
10
50
M16
8
12
60
97
12
60
M18
9
15
72
116
14
70
M20
11
17
84
134
16
80
M24
12
20
96
154
18
90
M27
14
22
108
173
20
100
M30
15
24
120
191
25
125
M33
20
30
150
234
7
DIN 50125:2009-07
4.4
Type C test pieces
Key
do
test piece diameter
h
d1
diameter of gripped ends ( 1,75 do)
Lo
length of gripped ends ( do + 5 mm)
original gauge length (Lo = 5 do)
d2
diameter of shoulder ( 1,2 do)
length of shoulder ( do)
Lc
parallel length (Lc
Lt
total length of test piece
g
Lo + do)
Figure 3 • Type C test piece, of circular cross section, with shoulder ends
Designation of a type C test piece with a diameter do = 16 mm and original gauge length Lo = 80 mm:
Tensile test piece DIN 50125 ! C 16 × 80
Table 4 • Examples of dimensions for type C test pieces
Dimensions in millimetres
8
do
Lo
d1
min.
d2
r
min.
4
20
7
5
3
5
25
9
6
6
30
11
8
40
10
g
h
min.
Lc
min.
Lt
min.
4
7
24
49
4
5
8
30
61
8
5
6
11
36
72
14
10
6
8
13
48
93
50
18
12
8
10
15
60
117
12
60
21
15
9
12
17
72
140
14
70
25
17
11
14
19
84
162
16
80
28
20
12
16
21
96
186
18
90
31
22
14
18
23
108
209
20
100
35
24
15
20
25
120
231
25
125
44
30
20
25
30
150
284
DIN 50125:2009-07
4.5
Type D test pieces
Key
do
test piece diameter
Lo
original gauge length (Lo = 5 do)
d1
diameter of shoulder ( 2 do + 8 mm)
length of gripped ends
Lc
parallel length (Lc
Lt
total length of test piece
h
a
Lo + do)
Ends may be extended, provided the specified diameter d1 is maintained.
Figure 4 ! Type D test piece, of circular cross section, with conical ends
Designation of a type D test piece with a diameter do = 12 mm and original gauge length Lo = 60 mm:
Tensile test piece DIN 50125 " D 12 × 60
Table 5 ! Examples of dimensions for type D test pieces
Dimensions in millimetres
do
Lo
d1
r
h
min.
Lc
Lt
min.
min.
4
20
16
3
4
24
38
5
25
18
4
5
30
48
6
30
20
5
6
36
58
8
40
24
6
8
48
75
10
50
28
8
10
60
93
12
60
32
9
12
72
110
14
70
36
11
14
84
127
16
80
40
12
16
96
144
18
90
44
14
18
108
161
20
100
48
15
20
120
177
25
125
58
20
25
150
218
9
DIN 50125:2009-07
4.6
Type E test pieces
Key
test piece thickness
Lo
original gauge length (Lo = 5,65
o
bo
test piece width
Lc
parallel length (Lc
bo )
B
width of gripped ends ( 1,2 b + 3 mm)
Lt
total length of test piece
h
length of gripped ends ( 2 b + 10 mm)
o
Lo + 1,5
o
bo )
Figure 5 ! Type E test piece, flat bar with ends for clamping in wedge grips
Designation of a type E test piece with a thickness o = 5 mm, width bo = 16 mm and original gauge length
Lo = 50 mm:
Tensile test piece DIN 50125 • E 5 × 16 × 50
Table 6 ! Examples of dimensions for type E test pieces
Dimensions in millimetres
bo
o
10
Lo
B
min.
r
min.
h
min.
Lc
min.
Lt
min.
3
4
8
10
30
35
12
15
12
12
26
30
38
45
104
120
5
5
10
16
40
50
15
22
12
15
30
40
51
64
126
162
6
7
20
22
60
70
27
29
15
20
50
55
77
89
197
222
8
10
25
25
80
90
33
33
20
20
60
60
102
114
246
258
10
12
30
26
100
100
40
34
25
25
70
65
126
127
296
285
15
18
30
30
120
130
40
40
25
25
70
70
152
165
322
335
DIN 50125:2009-07
Flat test pieces are usually to be taken from strip, sheet, bars and sections. The edges should be deburred. If
NOTE 1
the rolling skin is not machined off, the test piece thickness o is equal to the product thickness.
NOTE 2
Where flat test pieces are machined on all surfaces, the specified surface roughness applies for all surfaces,
with the exception of the test piece ends.
4.7
Type F test pieces
Unmachined sections of round bars
Designation of a type F test piece with a diameter do = 10 mm and original gauge length Lo = 50 mm:
Tensile test piece DIN 50125 ! F 10 × 50
Table 7 " Examples of dimensions for type F test pieces
Dimensions in millimetres
Total length of
test piece
Lt
min.
Test piece diameter
Original gauge length
do
Lo
6
30
100
8
40
120
10
50
140
12
60
170
14
70
190
16
80
210
18
90
240
20
100
260
25
125
310
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DIN 50125:2009-07
4.8
Type G test pieces
Unmachined sections of flat bars and sections
Designation of a type G test piece with an original cross-sectional area So = 314 mm2 and original gauge
length Lo = 100 mm:
Tensile test piece DIN 50125 ! G 314 × 100
Table 8 " Examples of dimensions for type G test pieces
Original cross-sectional area
Original gauge length
So
Lo
mm2
12
Total length of
test piece
Lt
min.
50
40
130
78
50
150
113
60
170
154
70
190
200
80
210
254
90
230
314
100
250
380
110
270
452
120
290
530
130
310
DIN 50125:2009-07
4.9
Type H test pieces
Flats taken from flat products having a thickness between 0,1 mm and 3 mm: sheet, strip and flat rolled
products, non-proportional test pieces
Key
test piece thickness (= product thickness)
Lo
original gauge length
bo
test piece width
Lc
parallel length (Lc = Lo + 2 b)
B
h
width of gripped ends
length of gripped ends
Lt
total length of test piece
o
Figure 6 ! Type H test piece, flat bar with ends for clamping in wedge grips
Designation of a type H test piece with a width bo = 20 mm and original gauge length Lo = 80 mm:
Tensile test piece DIN 50125 " H 20 × 80
Table 9 ! Examples of dimensions for type H test pieces
Lo
B
r
h
min.
Lc
Lt
min.
12,5
50
20
20
35
75
165
20
80
30
20
50
120
250
bo
1
NOTE 1 Flat test pieces are usually to be taken from strip and sheet. The edges should be deburred. Where possible,
the rolling skin should not be machined off.
NOTE 2 Manufacturing test pieces by punching may result in significant changes in the material characteristics,
particularly the proof stress (due to strain hardening). For materials which are known to strain-harden, test pieces should
be prepared by milling, grinding, etc.
5
Marking
Tensile test pieces shall be marked in such a way that, after testing, it is still possible to determine from which
sample the test pieces were taken, as well as their location and direction in the sample, where necessary. The
marking shall be applied to the face or side of one end, or to both ends, where necessary.
13
DIN 50125:2009-07
Bibliography
DIN 50148, Tensile test pieces for non-ferrous metals pressure die castings
DIN 50154, Tensile test without extensometer on foils and strips of aluminium and wrought aluminium alloys
with a thickness up to 0,179 mm
DIN EN 1561, Founding ! Grey cast irons
DIN EN ISO 22674, Dentistry ! Metallic materials for fixed and removable restorations and appliances
14