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TU 14-4-385-73 (alloy wire for cold heading)

  Technical conditions TU 14−4-385−73 90 g.
MCHM-USSR Alloy steel wire
for cold heading
Instead
ChMTU 5615−56 and
ChMTU / NIIMETIZ 115−64

b) OKP 12 2100

These specifications apply to alloy steel wire for the production of rivets and bolts by cold heading.

1. Nomenclature

1.1. The wire, depending on the order, is made of steel grades 16ХСН, 20Г2, 30ХГСА, 30ХМА.

1.2. Wire made of steel grade 16ХСН is intended for the manufacture of bolts.

Mari 20G2 steel wire is intended for the manufacture of rivets.

Wire made of steel grade 30HGSA is intended for the manufacture of bolts and high-strength rivets.

Wire made of steel grade 30XMA is intended for the manufacture of particularly critical rivets.

1.3. The wire is subdivided, depending on the order, into pre-grinded with subsequent drawing («D» «", and unpolished — cold-drawn — («X») — by surface finish; normal and high precision («P») — by manufacturing accuracy.

2. Range

and)

2.1. The wire is made: group «D» — with a diameter of 2.0 1.0 to 8.0 8.2 mm; group «X» — with a diameter of 2.8 to 8.2 mm. Limit deviations in accordance with table. 1. The wire diameter is specified in the order.

The wire is made:

group «D» — with a diameter of 1.0 to 10.1 mm;

group «X» — with a diameter of 1.0 to 8.2 mm;
hereinafter (4).

In the column «Wire diameter» table. 1 enter the size of St. 6.0 to 8.2 mm.

Factory developed
«Proletarian Labor»

Approved

MCHM-26 / Sh-1973

Agreed

with MAP

Introduction date from
01.10.1973 g.

Valid until
01.01.1979 g, 84 g, before 01.01.90 g.

a) Change. No. 1 4) Change. No. 4
b) Change. No. 3 28.07.77 5) Amendment No. 5 of the article 9.8.4

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TU 14−4-385−73 Alloy steel wire for cold
disembarkation

Table 1

mm
The diameter of the wire Limit deviations
Normal precision wire High precision wire

a) from 2.8 (1.0) to 3.0

St. 3.0 to 6.0

St. 6.0 to 8.2 (10.1) (4)

-0.06

-0.08

-0.10

-0.04

-0.05

-0.06

Note. It is allowed to manufacture wire with dimensions not provided for in Table 1 in accordance with the specialization of the supplying plant. In this case, the maximum deviations are taken by the nearest size.

2.2. The ovality of the wire should not exceed half of the maximum deviations in diameter.

2.3. Examples of wire symbol:

  • wire with a diameter of 4.0 mm, grade 16KhSN, pre-polished, of increased manufacturing accuracy: wire 4−16KhSN-D-P-TU14−4-385−73;
  • Cold-drawn wire with a diameter of 5.0 mm, grade 30XMA, of normal manufacturing accuracy: wire 5−30XMA-X-TU14−4-385−73.

3. Technical requirements

3.1. The chemical composition of steel and the permissible deviations for it must comply: for steel grade 20G2 — GOST 10702−63 (78) (a), for steel grade 30XMA — 4543−71; for steel grade 30HGSA — ChMTU 1−950−70 (TU 14−1-950−74 or GOST 4543−71 (4); for steel grade 16KHSN — Table 2

table 2

Chemical composition,%
steel grade Carbon Silicon Manganese Chromium Nickel Copper Sulfur Phosphorus
no more
16ХСН 0.13−0.20 0.60−0.90 0.30−0.60 0.80−1.10 0.60−0.90 0.20 0.035 0.035

a) Change. No. 1
4) Change. No. 4

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TU 14−4-385−73 Alloy steel wire for cold
disembarkation

Note. For steel grade 16KhSN, the following deviations in chemical composition are allowed: carbon ± 0.01%, silicon ± 0.02%, chromium ± 0.05%, manganese ± 0.02%, nickel -0.05%.

3.2. In steel grade 16ХСН, produced by the scrap process, a residual copper content of up to 0.30% is allowed.

3.3. The wire is supplied in a weakly hardened state with obligatory preliminary annealing for granular perlite.

a) Note. Wire with a diameter of less than 2.0 mm made of steel grade 30HGSV is supplied in a heat-treated state. Indicators of mechanical properties are established by agreement of the parties .

3.4. The mechanical properties of the wire as delivered must correspond to table. 3.

1) Note. Wire made of steel grade 16ХСН with diameters of more than 8.0 to 8.2 mm is supplied by the Beloretsk Metallurgical Plant with a relative elongation of at least 8%.

Table 3

steel grade Mechanical properties

(5) Ultimate tensile strength, N / mm 2 (kgf / mm 2)

Elongation,%, not less

16ХСН

20G2

30HGSA

30XMA

440−650 N / mm 2 (45−65 kgf / mm 2)

490−700 N / mm 2 (50−70 kgf / mm 2)

490−750 N / mm 2 (50−75 kgf / mm 2)

440−650 N / mm 2 (45−65 kgf / mm 2)

ten

ten

eight

ten

3.5. The wire shall withstand the cold upset test up to 1/3 of the original height of the specimen. In this case, cracks and tears should not form.

5) Wire with a diameter of 3.0 mm and above must withstand the cold upset test up to 1/3 of the original height of the sample. In this case, cracks and tears should not form.

For wires up to 3.0 mm in diameter, the upset test is replaced by deep etching. The surface of the etched samples should not have etched cracks, captivity, sunsets, hairs, delamination.

3.6. The macrostructure of steel when checked on small or etched templates should not have a shrinkage cavity and looseness, bubbles, delamination, cracks, non-metallic inclusions visible without magnifying devices.

3.7. The surface of the wire of the group «D» (previously polished with subsequent drawing) should be smooth, without cracks, marks, captivity, sunsets, delamination, rough edges, hairs and rust.

a) Change. No. 1

b) Change. No. 2 29.01.77

3) Change. No. 3

5) Change. No. 5, uk. 9−84 12.12.84 g.

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TU 14−4-385−73 Alloy steel wire for cold
disembarkation

Separate dents and nicks with a depth not exceeding the maximum deviations in diameter, individual scratches, risks not exceeding half of the maximum deviation in diameter are allowed.

3.8. The surface of the wire of the group «X» (unpolished cold-drawn) should be smooth, without cracks, marks, captivity, sunsets, delamination, roughness and rust.

Separate dents and nicks with a depth not exceeding the maximum deviations in diameter, individual scratches, hairs and marks, the value of which does not exceed half of the maximum deviations in diameter, are allowed.

3.9. Decarburization (along the pure ferrite zone) per side should not exceed

for wire of group «X»:

with a diameter of up to 3.0 mm — 0.05 mm

the same St. 3.0 to 6.0 mm — 0.07 mm

— «- St. 6.0 to 8.0 mm — 0.10 mm;

for wire of group «D»:

with a diameter of up to 4.0 mm — 0.05 mm

the same St. 4.0 to 6.0mm — 0.07mm

— «- St. 6.0 to 8.0 (8.2; 10.1) mm — 0.10 mm; (fourteen)

3.10. The wire should be supplied rolled in coils. The coil weight should not be less than 20 kg.

3.11. The wire must be accepted by the quality control department of the manufacturer.

4. Acceptance rules and test methods

4.1. Wire is supplied in lots. Each batch should consist of one wire grade, one heat, one surface finish group and precision workmanship. The batch size is at the discretion of the manufacturer.

4.2. Each coil of wire is measured and inspected for surface condition. The diameter is measured with a measuring tool with an accuracy of 0.01 mm in two mutually perpendicular directions in one section, not less than in three places of each coil.

1) Change. No. 3 28.07.77

4) Change. No. 4 03.01.79

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TU 14−4-385−73 Alloy steel wire for cold
disembarkation

The surface condition is checked without the use of magnifying devices. In doubtful cases, it is allowed to use a magnifying glass of five times magnification and brighten the surface with sandpaper.

4.3. The depth of the defect is determined by removing it by stripping and measuring the diameter of the wire at the point of stripping.

4.4. To check the ultimate tensile strength, elongation, decarburization, microstructure, as well as sediment, take 5% of coils, but not less than three coils from each batch.

For each type of test, samples should be taken from both ends of each controlled coil.

4.5. Checking the microstructure is carried out on etched cross sections of the wire under a microscope.

4.6. The chemical composition of the steel is certified by the certificate of the metal manufacturer.

4.7. Wire tensile testing to determine the ultimate tensile strength and elongation is performed in accordance with GOST 10446−63 (80) (5). In this case, the calculated length of a wire sample up to 5.0 mm is taken equal to 50 mm, for a wire with a diameter over 5.0 mm — 10d.

4.8. The depth of the decarburized layer is determined according to GOST 1763−68 .

4.9. Draft test is carried out in accordance with GOST 8817−73

4.10. In the event of unsatisfactory results of any test from among those provided for by these specifications, repeated tests are allowed on a double number of samples taken from the same skeins. The repeated procedure is carried out only for those types of tests for which unsatisfactory results were obtained.

In case of unsatisfactory results of retesting at least one sample, the batch is rejected or each skein is taken separately.

(5) Rev. No. 5 uk.9−84.

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TU 14−4-385−73 Alloy steel wire for cold
disembarkation

5. Marking, packaging, storage, transportation.

5.1. Coils of one steel grade, one melt, one diameter, one surface finish group of the same manufacturing accuracy can be tied into coils. The mass of such a coil-coil should not exceed 100 kg.

5.2. Each skein should be tied evenly in at least three places.

5.3. Coils-coils of wire should be lubricated with a lubricant that protects against corrosion, and packed in a plastic film (without a paper underlayer) or container cloth (or matting) with a pre-wrap, oiled or waxed paper.

5.4. A tag must be firmly attached to each skein (s) ( coil )), which must indicate:

  • a) conventional sign of the manufacturer;
  • b) conventional designation of the wire;
  • c) heat number.

5.5. Each batch of wire must be accompanied by a certificate attesting that the quality of the wire meets the requirements of these technical specifications.

5.6. The wire should be stored and transported under conditions that ensure its safety from corrosion and mechanical damage.

5) Note. The wholesale price for wire is listed in the price list No. 01−17−1980.

(pn) 6. Procedure for payment for products

6.1. Prices are set according to the appendix (see supplement to the appendix)

Right — (Kuznetsova)

a) Change. No. 1
nn) Letter of amendment NIIIMETIZ No. Ce5459 dated 07.26.76, uk.8−76

Appendix 3
to TU 14−4-385−73
form 3.1A
(required)

Name of the type of product according to NTD Product type code according to VKG OKP
Alloy steel wire for cold heading 12 100
Blocks by OKP Designation according to NTD OKP codes
Steel grades

16ХСН

20G2

30HGSA

30XMA

5219

4146

4335

4408

Profiles according to technical conditions 8198
Technical requirements TU 14−1-385−73 6920
Order forms and delivery terms Coils std. Masses 31

The term of introduction is from 01.01.1984.

  CHANGE # 1 TU 14−4-385−73
MCHM-USSR Alloy steel wire
for cold heading

Section 2. Range

Clause 2.1. to state in a new edition:
«2.1. The wire is made:
group «D» — with a diameter of 1.0 to 8.0 mm;
group «X» — with a diameter of 1.0 to 8.2 mm. «
further in the text.

Table 1, clause 2.1. in the column «Wire diameter» instead of the sizes 2.8 to 3.0, write from 1.0 to 3.0.

Section 3. Technical requirements.

Clause 3.3. add a note in the following edition:
«Note. Wire with a diameter of less than 2.0 mm made of steel grade 30HGSA is supplied in a heat-treated state. Indicators of mechanical properties are established by agreement of the parties. «

Section 4. Acceptance rules and test methods

In clause 4.9. the reference to GOST 8817−58 should be replaced with a reference to GOST 8818−73 .

Section 5. Marking, packaging, storage and transportation.

Clause 5.4. to state in a new edition:
«5.4. A tag must be firmly attached to each skein (bay), on… «. Further in the text.

Section 6. Procedure for payment for products

Supplement the application with a price for wire less than 2.8 mm in diameter.

Right (Mikhailyuk)

Developed by Research Institute
METIZOM

Approved

MCHM 25/10.1974

Agreed

with MAP

Introduction period

from 01 / 01−1975

-2-

TU 14−4-385−73

CHANGE # 1

Alloy steel wire
for cold heading

Appendix to the application

PAYMENT
wholesale prices for steel wire
alloyed for cold heading
from steels of grades 16ХСН, 30ХГСА,
20G2 and 30XMA

Amendment No. 1 supplemented technical specifications TU 14−4-385−73 with wire sizes 1, 0−2, 8 mm.

The method for calculating wholesale prices for newly added sizes without intermediate grinding is similar to the method for calculating wholesale prices in accordance with the appendix to TU 14−4-385−73.

The wholesale price for the added dimensions of the wire of the group «D» is determined by the ratio of the price ratio of the wire of a given diameter and diameter of 2.5−2.99 mm of the corresponding brand according to the basic specifications (No. 01−05, p. 143), ie by multiplication the specified coefficient for the wholesale price of wire with a diameter of 2.5−2.99 mm of the corresponding brand as per the appendix to TU 14−4-385−73.

The wholesale price of 1 ton of wire made of steel grade 16ХСН without intermediate grinding will be equal to:

For normal manufacturing accuracy For increased manufacturing precision

For wire Ø 1.0−1.49 mm

Tsn = 774 rubles. x 1.17 = 906 rubles.

Tsn = 774 rubles. x 1.21 = 936 rubles.

For wire Ø 1.5−1.99 mm

Tsn = 623 rubles. x 1.17 = 729 rubles.

Tsn = 623 rubles. x 1.21 = 754 rubles.

For wire Ø 2.0−2.49 mm

Tsn = 521 rubles. x 1.17 = 610 rubles.

Tsn = 521 rubles. x 1.21 = 630 rubles.

For wire Ø 2.5−2.99 mm

Tsn = 473 rubles. x 1.17 = 553 rubles.

Tsn = 473 rubles. x 1.21 = 572 rubles.

-3-

TU 14−4-385−73

CHANGE # 1

Alloy steel wire
for cold heading

The wholesale price of 1 ton of wire made of steel grade 16ХСН with intermediate grinding will be equal to:

For normal manufacturing accuracy For increased manufacturing precision

For wire Ø 1.0−1.49 mm

Tsn = х 882 rubles. = RUB 1440

Tsn = х 912 rubles. = RUB 1490

For wire Ø 1.5−1.99 mm

Tsn = х 882 rubles. = RUB 1160

Tsn = х 912 rubles. = 1200 rubles.

For wire Ø 2.0−2.49 mm

Tsn = х 882 rubles. = RUB 971

Tsn = х RUB 912 = RUB 1000

For wire Ø 2.5−2.99 mm

Tsn = х 882 rubles. = RUB 822

Tsn = х 912 rubles. = RUB 912

The calculation of wholesale prices for wire made of other steel grades was carried out in a similar way.

The calculation results are shown in the table.

Amendment No. 1 to TU 14−4-385−73, p. 4

Table

Alloy structural steel wire for cold heading Range and specifications
TU 14−4-385−73 with amendment number 1
Wire diameter, mm Wholesale price in rubles per ton of wire brands
20G2 30HGSA 16ХСН 30XMA
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
without interm.
grinding
group «X»
with intermediate.
grinding
group «D»
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
norms.
exact.
pov.
exact.
1.0−1.49 857 885 1430 1480 974 1000 1600 1640 906 936 1440 1490 943 975 1430 1480
1.5−1.99 676 698 1130 1160 781 805 1280 1320 729 754 1160 1200 765 791 1160 1200
2.0−2.49 554 573 925 956 652 672 1070 1100 610 630 971 1000 647 669 984 1120
2.5−2.99 497 513 829 857 589 607 965 995 553 572 882 912 587 607 894 924

Note. Wire with a diameter of less than 2.0 mm made of steel grade 30HGSA supplied in a heat-treated state
(note to clause 3.3. TU 14−4-385−73 with amendment No. 1), is priced at the prices indicated in the table.

Order 1824/26. 12/17/1974, Sent according to the list. Circulation 250 copies.

Multiplication base of VIAM

  CHANGE # 2 TU 14−4-385−73
MCHM-USSR Alloy steel wire
for cold heading

Section 3. TECHNICAL REQUIREMENTS

Clause 3.5. to state in a new edition:
«3.5. Wire with a diameter of 3.0 mm and above must withstand the cold upset test at 1/3 of the original height of the sample. In this case, cracks and tears should not form.
For wires up to 3.0 mm in diameter, the upset test is replaced by deep etching. The surface of the etched samples should not have etched cracks, captivity, sunsets, hairs, delamination. «

Correct: (Boydariko)

Order 2461/26. 09/28/1976 Distributed according to the list. Circulation 200 copies.

Multiplication base of VIAM

Designed by
NIIMETIZ

Approved

MCHM — З / УШ-1976

Agreed

with MAP-14- / UP-1976

Introduction period

from 10/15 to 1976

  CHANGE # 3 TU 14−4-385−73
MCHM-USSR Alloy steel wire
for cold heading

Section 2. VARIETY

Section 2.1. to state in a new edition:
«2.1. The wire is made of group «D» — with a diameter of 1.0 to 8.2 mm. «Further in the text.

Section 3. TECHNICAL REQUIREMENTS

Clause 8.4. add a note in the following edition:
«Note. Wire made of steel grade 16ХСН with diameters of more than 8.0 to 8.2 mm is supplied by the Beloretsk Metallurgical Plant with a relative elongation of at least 8%. «

In clause 3.9. decarburization (in the area of pure ferrite) per side should not exceed 0.09 mm for wire of group «D» with a diameter of over 6.0 to 8.2 mm.

Right (Mikhailyuk)

Order 2613/26. 11/17/77. Dispatched according to the list. Circulation 200 copies.

Multiplication base of VIAM

Designed by
Beloretsky met. combine

Approved

MCHM — 11/11/1976

Agreed

with MAP-22 / 10.1976

Introduction period

from 01/03/1977

MCHM AMENDMENT # 4 TU 14−4-385−73
the USSR Alloy steel wire
for cold heading

Title page

The validity period of the technical conditions shall be established until 01.01.

Section 2. Range

Clause 2.1. to state in a new edition:
«2.1. The wire is made:
group «D» — with a diameter of 0.1 to 10.1 mm;
group «X» — with a diameter of 0.1 to 8.2 mm… «Further in the text.
In the column «Wire diameter» of Table 1, instead of the dimensions «St. 6.0 to 8.2 «write» St. 6.0 to 10.1 «.

Section 3. Specifications

Clause 3.1. to state in a new edition:
«3.1. The chemical composition of steel and the permissible deviations for it must comply with: for steel grade 20G2 — GOST 10702−63; for steel grade 30XMA — GOST 4543−71; for steel grade 30HGSA — TU 14−1-950−74 or GOST 4543071; for steel grade 16ХСН — tab. 2 «.
The diameter of the wire of the group «D», provided in the last line of clause 3.9., Shall be stated in a new edition: «St. 6.0 to 10.1 mm «. Further in the text.

True: / Tetereva /

Order 3126 / 26.5.X.78 is sent according to the list. Circulation 250 copies.

Multiplication base of VIAM

Designed by
VNIIMetiz

Approved

MCHM — 14 / USh-1978

Agreed

with MAP-27 / UP-1978.

Introduction period

from 01 / 12−1978

MCHM USSR CHANGE # 5 TU 14−4-385−73
Alloy steel wire
for cold heading

Group B73

TITLE PAGE

The validity period of the technical conditions shall be extended until 01.01.1989
Enter OKP code 12 2100.

Section 3. TECHNICAL REQUIREMENTS

Clause 3.4. in table. 3 record the ultimate tensile strength in N / mm 2: for steel grade 16ХСН — 440−650 N / mm 2 (45−65 kgf / mm 2); 20G2 — 490−700 N / mm 2 (50−70 kgf / mm 2); 30KhGSA — 490−750 N / mm 2 (50−75 kgf / mm 2); 30XMA — 440−650 N / mm 2 (45−65 kgf / mm 2).

TU supplement with a note in edition:
«Note. The wholesale price for wire is listed in the price list No. 01−17−1980. «

Tu should be supplemented with Appendix 1 — Form 3.1A.

Replacement:
GOST 10702−63 replace GOST 10702−78
GOST 10446−63 «GOST 10446−80
GOST 8817−58 «GOST 8817−73.

True / Tetereva /

Reg. No. VIFS0111423 / 05 from 18.01.1984

VIAM. Order 317−84, circulation 50 copies.
Sent by list

Factory developed
«Proletarian Labor»

Approved

MCHM — 08/18/1983

Agreed

with MAP

Introduction period

from 01.01.1984

Appendix No. 3
to TU 14−4-385−73
Form 3.1A
/ required /

Name of the type of product according to NTD Product type code according to VKG OKP
Alloy steel wire for cold heading 12 2100
Blocks by OKP Designation according to NTD OKP codes
Steel grades

16ХСН

20G2

30HGSA

30XMA

5219

4146

4335

4408

Profiles according to technical conditions 8198
Technical requirements TU 14−4-385−73 6920
Order forms and delivery terms skeins std. masses 31

True / Tetereva /