An ISO 9001:2015 Certified Company
Chemical Composition of Stainless Steel Fasteners
| Chemical Composition of Stainless Steel Fasteners | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Group |
Grade |
Suitable Alloys |
Chemical Composition % ( min. / max. ) |
|||||||||
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Cu |
||||
Austenitic |
A1 |
303 |
0.12 |
1 |
6.5 |
0.20 |
0.15 to 0.35 |
16 to 19 |
0.7 |
5 to 10 |
1.75 to 2.25 |
|
A2 / B8 |
F304, 304L |
0.10 |
1 |
2 |
0.05 |
0.03 |
015 TO 20 |
– |
8 to19 |
4 |
||
A3 |
321, 347, 348 |
0.08 |
1 |
2 |
0.045 |
0.03 |
17 to 19 |
– |
9 to 12 |
1 |
||
A4/B8M |
316, 316L, (317, 317L) |
0.08 |
1 |
2 |
0.045 |
0.03 |
16 to 18.5 |
2 to 3 |
10 to 15 |
1 |
||
A5 |
316 Ti, 316 Cb |
0.08 |
1 |
2 |
0.045 |
0.03 |
16 to 18.5 |
2 to 3 |
10.5 to 14.5 |
1 |
||
Martensitic |
C1 |
410, 420 |
0.09 to 0.15 |
1 |
1 |
0.05 |
0.03 |
11.5 to 14 |
– |
1 |
– |
|
C3 |
431 |
0.17 to 0.25 |
1 |
1 |
0.04 |
0.03 |
16 to 18 |
– |
1.5 to 2.5 |
– |
||
C4 |
461, 416 Se |
0.08 to 0.15 |
1 |
1.5 |
0.06 |
0.15 to 0.35 |
12 to 14 |
0.6 |
1 |
– |
||
Ferritic |
F1 |
430 |
0.12 |
1 |
1 |
0.04 |
0.03 |
15 to 18 |
– |
1 |
– |
|
| Physical Properties | |||||
|---|---|---|---|---|---|
Steel Group |
Grade |
Property Class |
Tensile Strength Min. (N/mm2) |
Yield Strength 0.2% Offset Min. (N/mm2) |
Elongation After Fracture AL mm Min. |
Austenitic |
A1, A2, A3, A4, A5 |
50 |
500 |
210 |
0.6d |
70 |
700 |
450 |
0.4d |
||
80 |
800 |
600 |
0.3d |
||
Grade |
Standard |
Property Class |
Diameter In. |
Tensile Strength Min.(KSI) |
Yield Strength 0.2% Offset Min. (KSI) |
Elongation In 4D min.% |
Reduction Of Area Min% |
Hardness (Max.) Rockwell |
B8 / B8M |
ASTM A193 / A193M |
Class 1 , Class 2 |
All |
75 |
30 |
30 |
50 |
B96 |
To 3/4 |
125 |
100 |
12 |
35 |
C35 |
|||
Over 3/4 to 1 |
115 |
80 |
15 |
35 |
C35 |
|||
Class 1 , Class 2 |
All |
75 |
30 |
30 |
50 |
B96 |
||
To 3/4 |
110 |
96 |
15 |
45 |
C35 |
|||
Over 3/4 to 1 |
100 |
80 |
20 |
45 |
C35 |
|||
Torsional Strength as Per ISO 3506
| For Self Tapping Screw | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Thread |
ST 2.2 |
ST 2.6 |
ST 2.9 |
ST 3.3 |
ST 3.5 |
ST 3.9 |
ST 4.2 |
ST 4.8 |
ST 5.5 |
ST 6.3 |
ST 8 |
Minimum Torsional Strength Nm |
0.45 |
0.9 |
1.5 |
2 |
2.7 |
3.4 |
4.4 |
6.3 |
10 |
13.6 |
30.5 |
| For Austenitic Bolts and Screws M1.6 to M16 (Coarse Thread) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread |
M1.6 |
M2 |
M2.5 |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M16 |
||
Min. Breaking Torque, Mb min. -Nm |
Property Class |
70 |
0.2 |
0.4 |
0.9 |
1.6 |
3.8 |
7.8 |
13 |
32 |
65 |
110 |
290 |
80 |
0.24 |
0.48 |
0.96 |
1.8 |
4.3 |
8.8 |
15 |
37 |
74 |
130 |
330 |
||
Notes :
Special Stainless Steel Grade available on request
Material Test Certificate is provided as per the EN 10204: 3.1B/3.1 standard
All Austenitic Stainless Steel Fasteners are normally non-magnetic; After Cold working, some magnetic properties may be evident Please ref: ISO 3506-1 standard.
Fasteners Standard : ANSI, ASME, ASTM, SAE, IFI, ISO, DIN, DIN EN ISO, EN-Std, JIS.
Thread Types : ISO Metric (M), Unified ( UNC, UNF, UNEF, UNS, ), British Standard Whitworth (BSW), British Association (BA), National Pipe Taper (NPT / NPTF), British Standard Pipe Parallel (BSPP / BSPT)
Common Self-Tapping Thread Forms : Self-Tapping A / AB / B ; Self Tapping For Plastics ; Lag Screw Thread, Wood Screw Thread, Outdoor Deking Scre Thread, High-Low Screw Thread, Chipboard Screw Thread, Fetter Screw Thread, Drywall Screw Thread.
Comon Screw Thread Points : Type A, AB, B / Z, BF, BP, BT / 25, C, CA, Drill Point, D / 1, F, G, T / 23, U, 17, Needle Point Spoon Point, Nail Point, MAT Point, Taptite, Cup Point, Oval Point, Dog Point, Half Dog Point, Cone Point, Flat Point, Knurled Cup Point.
Self Drilling (SDS) Point Types : PT-1, PT-2, PT-3, PT-4, PT-5
Comman Screw & Bolt Heads , Coarse Thread
- We can Develop & Supply Products as per customer’s Specification / Drawing / Samples which are as following mentions.
- In various grades of Stainless Steel in Hot Forge, Cold Forge, Lost wax casting, Investment Casting, Precision Turned – Machined Parts /
- In various grades of Stainless Steel in sheet metal components and springs, Washers, Circlips, etc.
- In various grades of Stainless Steel in Fittings, Manifolds, Valves, DBB (Double block & Bleed Valve), Valve Spindles, Shafts, Stems & its parts, Flange Adopters, Shaft Collars.
- In various grades of Stainless Steel in Fittings, Weld Fitting, Tube Fitting, Pipe Fitting, Adaptor Head Flange, 37 ° Flare Fitting, Manifold Valve 2-3-5, Hydraulic Fitting, Pneumatics Fitting
- In Various Material & Grades of Stainless Steel, Brass, Copper for Marine Hardware’s, other non corrosive applications.
- In Various Material & Grades of Plastic Fasteners, Precision Machined Components.
- We can Develop & Supply Products are as following mentions Material & Grades.
- Carbon Steel : Low Carbon Steel, Medium Carbon Steel, Alloy Steel
- Stainless Steel : Austenitic Stainless Steel, Martensitic Stainless Steel, Ferritic Stainless Steel, Duplex, Super Duplex Stainless Steel.
- Other Material : Aluminium, Brass, Copper, Silicon Bronze, Nickel, Titanium
- Special Steel : Monel, Inconel, Hastelloy
- Plastic : PE-HD, PE-LD, PP, POM, PA 6, PA 6.6
