What’s stainless

Stainless nails

Introduction

Stainless nails are specified to Baloney EN ISO 3506. Part 1 covers bolts, screws and studs. Part 2 covers nuts. These specifications replace Baloney 6105. The most recent edition was released in ’09.

Chemical composition for austenitic stainless nails

Caffeine arrangements of the several fastener grades are proven in Table 1. The approximate equivalent grades in others are proven for reference. The composition ranges tend to be wider within this standard compared to the factors for that feedstock product, usually bar.

Table 1 Chemical composition for austenitic stainless nails
Grade Chemical Composition1 (% maxima unless of course mentioned)Notes Alternative names
C Si Mn P S Cr Mo Ni Cu
A1 0.12 1 6.5 0.2 0.15/.35 16-19 0.7 5-10 1.75-2.25 2 3 4 303S31, 303S42, 1.4305
A2 0.1 1 2 0.05 0.03 15-20-5 8-19 4 6 7 304, 394S17 (Baloney 3111), 1.4301, 1.4567
A3 0.08 1 2 0.045 0.03 17-19-5 9-12 1 8 321, 1.4541, 347, 1.4550
A4 0.08 1 2 0.045 0.03 16-18.5 2-3 10-15 4 7 9 316, 1.4401, 1.4578
A5 0.08 1 2 )045 0.03 16-18.5 2-3 10.5-14 1 8 9 316Ti, 1.4571, 316Cb, 1.4580
C1 0.09-.15 1 1 )05 .03 11.5-14 – 1 -9 410, 1.4006
C3 0.17-.25 1 1 .04 .03 16-18 – 1.5-2.5 – 431, 1.4057
C4 0.08-.15 1 1.5 .06 .15-.35 12-14 .6 1 2 9 416, 1.4005
F1 0.12 1 1 0.04 .03 15-18 -10 1 11 12
430, 1.4016, 430Ti, 1.4520 430Cb, 1.4511

Notes

Values are maximum unless of course otherwise indicated.
Sulphur might be changed by selenium.
When the nickel submissions are below eight percent, the minimum manganese content will be five percent.
There’s no minimum limit towards the copper content so long as the nickel submissions are more than eight percent.
Molybdenum might be present in the discretion from the manufacturer. However, if for many programs restricting from the molybdenum submissions are essential, this will be mentioned during the time of ordering through the customer.
When the chromium submissions are below 17 percent, the minimum nickel content ought to be twelve percent.
For austenitic stainless steels getting an optimum carbon content of ,03 %, nitrogen might be give no more than ,22 %.
Shall contain titanium &#8805 5 × C as much as ,eight percent maximum for stabilization and become marked properly in compliance with this particular table, or shall contain niobium (columbium) and/or tantalum &#8805 10 × C as much as 1, % maximum for stabilization and become marked properly in compliance with this particular table
In the discretion from the manufacturer the carbon content might be greater where needed to be able to have the specified mechanical qualities at bigger diameters, but shall not exceed ,twelve percent for austenitic steels.
Molybdenum might be present in the discretion from the manufacturer.
Could have titanium &#8805 5 × C as much as ,eight percent maximum.
Could have niobium (columbium) and/or tantalum &#8805 10 × C as much as one percent maximum.
Mechanical qualities for stainless nails

Three ‘property classes’ are designated to each one of the austenitic stainless fastener grades. Table 2 shows the .2% proof stress, tensile strength and elongation values for all these property classes.

Table 2 Mechanical qualities for austenitic stainless bolts, screws and studs

Steel Group Steel Grade Property Class Tensile Strength Rm1 min MPa 0.2% Proof Stress Rp0.21 min MPa Elongation A2 min mm
Austenitic
A1, A2, A3, A4, A5

50 500 210 0.6d
70 700 450 0.4d
80 800 600 0.three dimensional
Notes

The tensile stress is calculated around the stress area
To become determined around the actual screw length and this is not on a prepared test piece.
This latest revision has removed the limitations on how big fastener (M24) that the qualities in table 2 could be guaranteed. However, there’s an over-all clause which states the standard is just relevant as much as 39 mm diameter. Above that, the conventional can nonetheless be used provided both sides agree the qualities could be accomplished. The result of those changes would be to boost the maximum diameter which the category 70 and 80 qualities could be specified without discussion from 24 to 39 mm. This reflects the conservative character from the previous 24 mm limit. Indeed, class 70 and 80 qualities can be found above 39 mm however this should always be talked about using the supplier.

Property class 50 signifies the steel within the annealed condition.

The most typical and easily available supply condition is property class 70, which signifies a ‘cold drawn’ for that bar stock that the nails are created.

Property class 80 is dependant on seriously hard cold attracted bar.

Some nails, based on size and grade, could be provided within an &quotunofficial&quot class A100 condition, i.e. having a minimum tensile strength of 1000 MPa. This type of method is the Bumax 109.

All tensile stress values are calculated and reported when it comes to the nominal tensile stress part of the thread.

The elongation measurement is decided around the actual bolt or screw length and this is not on a prepared test piece. It’s expressed in millimetres (mm) of extension and never as percentage elongation, i.e. A = (L2 – L1)
(where L1 = original length and L2 = length after fracture)
d = nominal diameter of bolt, screw or stud

Table 3 ? Mechanical qualities for bolts, screws and studs ? Martensitic and ferritic steel grades

Steel group Steel
grade Property
class Tensile Strength Rm1 min MPa 0.2% Proof Stress Rp0.21 min MPa Elongation A2 min mm Hardness
HB HRC HV
Martensitic C1 50 500 250 0.2 d 147/209 155/220
70 700 410 0.2 d 209/314 20/34 220/330
1103 1100 820 0.2 d -36/45 350/440
C3 80 800 640 0.2 d 228/323 21/35 240/340
C4 50 500 250 0.2 d 147/209 -155/220
70 700 410 0.2 d 209/314 20/34 220/330
Ferritic F14 45 450 250 0.2 d 128/209 -135/220
60 600 410 0.2 d 171/271 -180/285
The tensile stress is calculated around the stress area
To become determined around the actual screw length and this is not on a prepared test piece
Hardened and tempered at least tempering temperature of 275 °C
Nominal thread diameter d &#8804 24 mm
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Providers of Stainless Nails

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