Chemical composition for Austenitic Stainless Steel
(Cast analysis, mass fraction in %)
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | Other elements and notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A2 | 0.10 | 1.00 | 2.00 | 0.050 | 0.030 | 15.0-20.0 | - 1) | 8.0-19.0 | 4.0 | - 2) | 3) |
| A4 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 16.0-18.5 | 2.00-3.00 | 10.0-15.0 | 4.0 | - 2) | 4) |
1) Molybdenum may be present.
2) If maximum carbon (C) is 0.030, nitrogen (N) may be present at maximum of 0.22.
3) If chromium (Cr) is below 17.0, minimum of nickel (Ni) shall be 12.0.
4) At the discretion of the manufacturer carbon (C) may be as high as necessary, allowing to obtain specific mechanical properties for larger diameters, but shall be not more than 0.12.
This table specifies the limits according to ISO 3506-1:2020 & ISO 3506-2:2020. The final choice of the chemical composition within the specified grade is at the discretion of the manufacturer, unless otherwise agreed.
Mechanical Properties for Austenitic Stainless Steel
| Property class | BOLTS Tensile Strength Rmf (MPa) | BOLTS Stress at 0.2% no-proportional elongation Rpf (MPa) | BOLTS Elongation after fracture A (mm) | NUTS Stress under proof load Sp (MPa) |
|---|---|---|---|---|
| 501) | 500 | 210 | 0.6d | 500 |
| 70 | 700 | 450 | 0.4d | 700 |
| 80 | 800 | 600 | 0.3d | 800 |
| 1002) | 1000 | 800 | 0.2d | 1000 |
1) not applicable for Grade A8
2) not applicable for Grade A1, A2 and A3
Based on ISO 3506-1:2020 & ISO 3506-2:2020
Minimum ultimate tensile loads for bolts / Proof load values for nuts
Coarse pitch thread (full loadability) Fmf (N)
| Thread | 501) | 70 | 80 | 100 |
|---|---|---|---|---|
| M3 | 2520 | 3530 | 4030 | 5040 |
| M3.5 | 3390 | 4750 | 5430 | 6780 |
| M4 | 4360 | 6150 | 7030 | 8780 |
| M5 | 7100 | 9930 | 11350 | 14190 |
| M6 | 10070 | 14090 | 16100 | 20130 |
| M7 | 14430 | 20210 | 23090 | 28860 |
| M8 | 18310 | 25630 | 29290 | 36610 |
| M10 | 29000 | 40600 | 46400 | 57990 |
| M12 | 42140 | 58990 | 67420 | 84270 |
| M14 | 57720 | 80810 | 92360 | 115500 |
| M16 | 78340 | 109700 | 125400 | 156700 |
| M18 | 96240 | 134800 | 154000 | 192500 |
| M20 | 122400 | 171400 | 195900 | 244800 |
| M22 | 151700 | 212400 | 242800 | 303400 |
| M24 | 176300 | 246800 | 282100 | 352600 |
| M27 | 229800 | 321600 | 367600 | 459500 |
| M30 | 280300 | 392500 | 448500 | 560600 |
| M33 | 346800 | 485500 | 554900 | 693600 |
| M36 | 408400 | 571800 | 653400 | 816800 |
| M39 | 487900 | 683100 | 780700 | 975800 |
1) only for Grade A1 to A5
Based on ISO 3506-1:2020 & ISO 3506-2:2020
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