GOST 17431-72
GOST 17431−72 Material powder. Sheets of alloy grade M-MP. Technical specifications (Changes No. 1−4)
GOST 17431−72
Group В53
STATE STANDARD OF THE USSR
Materials powder
SHEETS OF ALLOY GRADE M-MP
Specifications
Powder material. M-MP alloy Sheets. Specifications
OKP 185120
Date of introduction 1974−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR
DEVELOPERS
I. N. Golikov, doctor of engineering. Sciences; A. S. Kaplan; S. S. Gratsianova, Y. V. Voronin, candidate. tech. Sciences (supervisors work); Vladimir Karataev
2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from
3. The check date — 1997
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced | Item number |
| GOST 166−89 |
4.1 |
| GOST 427−75 |
4.1 |
| GOST 1497−84 |
4.4 |
| GOST 2991−85 |
5.4 |
| GOST 6507−90 |
4.1 |
| GOST 7564−73 |
4.3 |
| GOST 7566−81 |
3.1, 5.6 |
| GOST 8273−75 |
5.2 |
| GOST 8828−89 |
5.2 |
| GOST 9569−79 |
5.2 |
| GOST 10354−82 |
5.2 |
| GOST 11701−84 |
4.4 |
| GOST 14019−80 |
4.5 |
| GOST 14192−77 |
5.5 |
| GOST 17811−78 |
5.2 |
5. The REISSUE, September, 1992 with Amendments No. 1−4,
6. The expiration time limit is removed by a Decision
This standard applies to hot-rolled and cold-rolled sheets of alloy grade M-MP.
The letters in the name of the alloy means:
M is molybdenum;
MP — material powder.
1. CLASSIFICATION AND ASSORTMENT
1.1. Sheets of alloy grade M-MP is divided into:
a) according to the method of manufacture:
HR — G,
cold-rolled — X;
b) accuracy class rolling:
normal accuracy — I
increased accuracy — II.
1.2. Hot rolled sheets are produced in thickness of 1.0−30.0 mm, cold-rolled — of a thickness of 0.1−0.9 mm.
Dimensions and limit deviations for hot-rolled sheets shall be as specified in table.1, cold-rolled sheets — in table.2.
Table 1
Dimensions, mm
| Thickness |
Maximum deviations in thickness |
Width |
Length |
Mass of leaf, kg, no more |
| 1,0−2,0 |
+0,20 -0,15 |
50−600 |
150−1000 |
20 |
| 2,2−4,0 |
+0,25 -0,15 |
50−600 |
150−1000 |
20 |
| 4,5−6,0 |
+0,30 -0,20 |
50−600 |
150−1000 |
20 |
| 6,5−10,0 |
±0,40 |
100−600 |
150−1000 |
25 |
| 10,5−20,0 | ±1,0 | 100−400 | At least 150 | 30 |
| 20,5−30,0 |
±1,5 |
100−400 |
At least 150 | 30 |
Table 2
Dimensions, mm
| Thickness |
Maximum deviations in thickness for accuracy classes |
Width |
Length | |
| I |
II |
|||
| 0,1; 0,2; 0,3; 0,4 |
±0,05 |
±0,03 |
50−300 |
150−1000 |
| 0,5; 0,6; 0,7; 0,8 |
- |
±0,05 |
50−300 |
150−1200 |
| 0,9 |
±0,08 |
50−300 |
150−1200 | |
In accordance with order sheets are produced with variable length and width, measuring the length and width, length or width and multiple of fixed lengths within the limits specified in table.1 and 2.
The leaves are dimensional sizes with thickness up to 10 mm are made with obraznymi edges. Tolerances for length and width must not exceed plus 15 to minus 5 mm.
The leaves are dimensional sizes of a thickness of > 10 mm is made with neobreznye edges, with maximum deviations from the contour maps of the cutting is determined by agreement between manufacturer and consumer.
In coordination with the consumer leaves the dimensional sizes of a thickness of > 10 mm is made with obraznymi edges. Tolerances for length and width must not exceed plus 15 to minus 5 mm.
Dimensions sheets width and length are set with an interval of 25 mm thickness with an interval of 0.2 mm for sheets of thickness 1.0−3.0 mm and an interval of 0.5 mm for sheets of thickness greater than 3.0 mm.
(Changed edition, Rev. N 3).
1.3. The leaves, the size and weight of which is not specified in the table.1 and 2, are delivered on agreement of the parties.
1.4. Flatness of sheets with a thickness of 1.0−3.0 mm should not exceed 2,0 mm to 100 mm, sheet thickness St mm 3.0 mm — 1.0 mm 100 mm length.
1.5. For sheets with a thickness of 0.4 mm or less, the slight undulations, disappearing when collapsing tiles in a cylinder with a diameter of 100 mm.
Examples of symbols
Steel hot-rolled sheet of alloy grade M-MP, 1.0 mm thick, width 450 mm, length 800 mm:
Sheet M-MP-G-1,0х450х800 GOST 17431−72
The same, cold rolled, class I accuracy, thickness 0.3 mm, width 300 mm, length 500 mm:
Sheet M-MP-X-I-0,3х300х500 GOST 17431−72
The hot-rolled annealed sheet of the alloy grade M-MP with a thickness of 4.0 mm, a width 50−600 mm, length 700 mm:
Sheet M-MP-G-0−4,0х50−600х700 GOST 17431−72
(Changed edition, Rev. N 4).
2. TECHNICAL REQUIREMENTS
2.1. Sheets of alloy grade M-MP must meet the requirements of this standard and technical documentation approved in the established order.
(Added, Rev. N 1).
2.1. Molybdenum powder for the manufacture of sheets should have the following chemical composition, % not more
iron — 0,014;
aluminum — 0,005;
Nickel — 0,005;
silicon — 0,005;
magnesium — 0,003;
sodium — 0,015;
potassium — 0,05;
calcium — 0,007;
tungsten — 0,4;
the oxygen and moisture — 0,3;
molybdenum — the rest.
The particle size of the powder should not be more than 0.005 mm for 92% of powder by weight.
Allowed as source material to use of the plate of molybdenum, the chemical composition of which satisfies the requirements of molybdenum powder.
The chemical composition of the finished sheet is provided by the manufacturer are not below the norms established for the original powder.
(Changed edition, Rev. N 3).
2.2. (Deleted, Rev. N 3).
2.2. In accordance with an order of hot-rolled sheets are produced in the annealed or without annealing with a surface cleansed of the acid.
(Added, Rev. N 4).
2.3. On the surface of the leaves should be free of cracks, shells, sunsets, inclusions.
Permitted defects in the form of dings, nadavas from the rolls, grooves, scratches, tears on edges and traces of Stripping and etching, not outputting the sheets beyond the minimum size.
On the edges of the bundle is not allowed. Allowed darkening of the surface from oxidation during transportation and storage.
(Changed edition, Rev. N 3).
2.4. On request, sheets with a thickness of 1.0 to 6.0 mm are subjected to ultrasonic inspection (UT) in the presence of internal defects — delamination, foreign inclusions, etc.
Ultrasonic inspection of sheets of other thicknesses is made by agreement of the parties.
2.5. In hot-rolled sheets with a thickness of 1,0−6,0 mm not permitted a complete recrystallization structure.
(Changed edition, Rev. N 3).
2.6. Mechanical properties of sheets with a thickness of 1,0−6,0 mm should conform to the standards specified in table.3.
Table 3
| Thickness, mm |
Tensile strength |
Elongation |
| not less than | ||
| 1,0−1,8 |
690 (70) |
8 |
| 2,0−4,0 |
690 (70) |
10 |
| 4,5−6,0 |
640 (65) |
8 |
Note. Rules are specified for hot-rolled sheets in annealed condition.
(Changed edition, Rev. N 2−4).
2.7. Sheets with a thickness of 0.7 mm or less, must withstand the bend test to the parallelism of the sides around the mandrel with a thickness of, mm:
2 — for sheets with thickness up to 0.2 mm incl.;
5 — for sheets with a thickness of SV 0.2 to 0.5 mm incl.;
8 — for sheets with thickness St 0,5 to 0,9 mm, incl.
12 — for sheets with thickness St of 0.7 to 0.9 mm incl.
To bend the ground should be free of breaks and peeling.
(Changed edition, Rev. N 3).
2.8. On demand of the consumer determines the mechanical properties of sheets of thickness more than 6.0 mm.
Norms are established by agreement of the parties.
3. ACCEPTANCE RULES
3.1. The leaves are placed upon the acceptance by the parties or parts of parties. The party must consist of sheets of one thickness of one technological mode of manufacture and the same batch of powder.
The weight of the batch shall not exceed 1500 kg.
The party was escorted by a quality document in accordance with the requirements of GOST 7566*, with the following addition: «the chemical composition of the powder point according to the manufacturer of the powder."
________________
* On the territory of the Russian Federation GOST 7566−94. Here and further. — Note the manufacturer’s database.
(Changed edition, Rev. N 2, 3).
3.2. Quality check sheets:
dimensions, warpage and surface condition — 100% of leaves;
mechanical properties — on a single sheet of the party;
bending test on five sheets from the party;
microstructure — on two sheets from the party.
(Changed edition, Rev. N 2).
3.3. If unsatisfactory results of the Flexural testing, mechanical properties or microstructure of the repeat tests are carried out for the metric that you have received unsatisfactory results in twice the number of samples taken from new leaves.
Upon receipt of unsatisfactory results, re-testing the whole batch is subjected to 100-percent control for the metric that you have received poor results.
The results of the 100% control are final.
Note. At 100% strength to control the microstructure allowed sampling from the corners of the sheet.
3.4. In coordination with the consumer leaves supply without determining the mechanical properties. The manufacturer guarantees the mechanical properties specified in the standard.
(Added, Rev. N 3).
4. TEST METHODS
4.1. Check the dimensions with a ruler according to GOST 427, caliper according to GOST 166, micrometer according to GOST 6507 or other measuring tools that provide required accuracy of measurement.
Warpage is determined on a flat surface plate with a ruler. The dimensions of the calibration plate should not be less than the dimensions of the reference sheet width and length. The deviation of the surface of the sheet from the flat condition is determined by the maximum deflection between the surface sheet, laid on the plane, and attached a ruler with a length of 100 mm in any direction.
(Changed edition, Rev. N 3).
4.2. Ultrasonic inspection produced by the method provider in accordance with the cutting chart, as agreed with the consumer.
Defective areas are marked on the sheet.
At the request of the consumer, the method of ultrasonic testing shall be agreed between the parties.
4.3. To determine the mechanical properties of the selected two samples for bend test of five samples, one from each of the sheet according to GOST 7564*.
______________
* On the territory of the Russian Federation GOST 7564−97. — Note the manufacturer’s database.
(Changed edition, Rev. N 2).
4.4. The tensile test is carried out for sheets with thickness less than 3 mm according to GOST 11701, for sheets with a thickness of 3 mm or more — according to GOST 1497 on samples of type 1.
(Changed edition, Rev. N 4).
4.5. The bend test is carried out according to GOST 14019*.
______________
* On the territory of the Russian Federation GOST 14019−2003. — Note the manufacturer’s database.
4.6. To control the microstructure of each sheet take two samples, one from different angles, carved from the Central part of the width of the sheet. Sections are made along the direction of rolling. The prepared micro-sections etched and examined under a microscope at a magnification of 90 to 100.
If necessary, pictures or samples are unacceptable microstructure set by agreement of the parties.
Recommended solution and etched micro-sections given in the Appendix.
(Changed edition, Rev. N 2).
4.7. (Deleted, Rev. N 3).
4.8. When control leaves more than 6 mm on the map cutting the surface defects, internal defects and deviations from marginal deviations in thickness beyond the cutting cards are not a sign of rejection.
(Changed edition, Rev. N 3).
4.9. The surface quality check by inspection without the use of special devices.
(Added, Rev. N 3).
5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE
5.1. (Deleted, Rev. N 3).
5.2. The leaves are Packed in bundles. Each pack cold-rolled sheets of wrap paper according to GOST 8273, GOST 9569*, GOST 8828 or other normative technical documents (NTD), or polyethylene film according to GOST 10354 or other NTD, or placed in polyethylene bags according to GOST 17811 or other NTD.
______________
* On the territory of the Russian Federation GOST 9569−2006. — Note the manufacturer’s database.
The weight packs should not exceed 20 kg.
Each hot rolled sheet shift paper, and a wad of leaves wrapped in a polyethylene film according to GOST 10354 PLI other NTD, or placed in polyethylene bags according to GOST 17811 or another NTD. The mass of a pack should not exceed 60 kg.
On the surface of the leaves allowed the presence of a neutral lubricant.
5.3. Each pack of sheets labeled indicating:
a) brand of alloy;
b) the batch number;
in) size sheets;
d) the mass of the bundle;
d) technical control mark or of the signature of the worker of the technical control.
5.4. Bundles of leaves are Packed in a box for NTD, developed on the basis of GOST 2991 (type III), which is labeled, indicating:
a) brand of alloy;
b) the batch number;
in) size sheets;
d) weight net gross box;
d) technical control mark or of the signature of the worker of the technical control.
The gross mass of the box should not exceed 70 kg. permitted on the boxes to apply labels: «Caution, fragile», «Afraid of dampness».
5.5. Transport marking under GOST 14192* with application of manipulation signs «Caution fragile», «Afraid of dampness».
______________
* On the territory of the Russian Federation GOST 14192−96. — Note the manufacturer’s database.
5.2−5.5. (Changed edition, Rev. N 3).
5.6. Leaves transporterowych all types of transport in covered vehicles in accordance with goods transportation regulations applied to this type of transport. General requirements for transport according to the GOST 7566.
(Changed edition, Rev. N 2, 3).
5.7. The leaves should be stored in a heated enclosed space.
(Changed edition, Rev. N 3).
6. MANUFACTURER’S WARRANTY
6.1. The manufacturer guarantees the conformity of the leaves with the requirements of this standard when complying with the storage conditions.
Warranty period of storage — 3 years from date of manufacture.
Sec. 6. (Added, Rev. N 2).
APPLICATION (recommended). SOLUTION AND ETCHED MICRO-SECTIONS
APP
Recommended
For etching using the solution of the following composition:
Koh or NaOH — 20 g;
KFe (SP)
(red blood salt) — 20 g;
NOn — 200 ml.
The etching time to 1 min. If the cone is covered with the oxide film, then it is removed on a damp cloth. After etching, the cone is washed in water and ethanol and dried.
