← Back to Surface Treatment Hub
Specifications
Grade Variants
| Grade |
Thickness (µm) |
Salt Spray (h) |
Max Temp (°C) |
HE Risk |
Standards |
| Fe/Cr 20 |
10–30 |
96 |
400 |
⚠️ Yes |
DIN933ISO4017 |
Constraint Rules
-
🔴 RULE_COATING_CONFLICT
Coating Compatibility — Ensure the selected finish is supported by the target standard
-
🟠 RULE_CORROSION_CHECK
Corrosion Resistance — Ensure the coating's salt spray hours meet the environmental corrosion class requirements
-
🔴 RULE_HE_RISK
Hydrogen Embrittlement Risk — Warning for high-strength bolts (≥1000 MPa) using acid pickling process
-
🟡 RULE_TEMP_LIMIT
Temperature Limit — Ensure the operating temperature does not exceed the coating's maximum service temperature
-
🟠 RULE_THREAD_FIT
Thread Fit — Ensure coating thickness does not exceed the thread tolerance allowance
-
🟠 RULE_COATING_THICKNESS
Coating Thickness — Ensure the actual coating thickness is within the standard allowable range
-
🔴 RULE_ISO4042_C2D_HEX_CHROME
ISO 4042 C2D Hexavalent Chromium Warning — C2D uses Cr⁶⁺ passivation, restricted by RoHS/REACH
-
🟡 RULE_ISO4042_CODE_DECODE
ISO 4042 Coating Code Validation — Ensure coating code format is correct (C/D/E/F + thickness class + passivation type)