Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASTM F436/F436M Type 3 Washer
ASTM F436 Type 3 washers are
weathering steel washers
manufactured to chemical composition or a Corrosion Index (CRI) of 6 or
higher at the suppliers option. The atmospheric corrosion resistance is
required.
Type 3 washers having a Copper minimum Heat Analysis of 0.25
B Weathering steel washers may also be manufactured from any of the steels
listed in Table 2 of Specification A588/A588M
and F3125.5.5
Chemical
analyses shall be performed in accordance with Test Methods, Practices, and
Terminology A751.
Product Analysis are not applicable to Type 3 washers
furnished to a CRI of 6 or higher calculated from the Heat
Analysis.The corrosion Resistance Index shall be calculated
from the Heat Analysis in accordance with G101 Prediction
Method based on the data of Larabee and Coburn
When providing Weathering Steels to a calculated corrosion index use the
Legault-Leckie formula from Guide G101. Link to online calculator:
http://www.astm.org/COMMIT/G01_G101Calcultr1100.xls
| Element | Value |
|---|---|
| I5 | 26.01 |
| Cu | 13.88 |
| Ni | 11.20 |
| Cr | 11.49 |
| Si | 17.28 |
| P | 7.29 |
| Cu · Ni | 29.10 |
| Ni · P | 33.39 |
| Cu² | - |
ASTM F436/F436M Type-3 Chemical Requirements
| Element | Analysis | Composition, % |
|---|---|---|
| Type 3B | ||
| P, max | Heat analysis | 0.040 |
| Product analysis | 0.045 | |
| S, max | Heat analysis | 0.050 |
| Product analysis | 0.055 | |
| Si | Heat analysis | 0.15-0.35 |
| Product analysis | 0.13-0.37 | |
| Cr | Heat analysis | 0.45-0.65 |
| Product analysis | 0.42-0.68 | |
| Ni | Heat analysis | 0.25-0.45 |
| Product analysis | 0.22-0.48 | |
| Cu | Heat analysis | 0.25-0.45 |
| Product analysis | 0.22-0.48 | |
|
||
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