316Ti vs 630 / 17-4PH: 62% composition overlap. Moderate differences, generally not direct substitutes.
316Ti vs 630 / 17-4PH
Side-by-side chemical composition and mechanical property comparison.
Overview
316Ti
1.4571
Titanium-stabilized austenitic stainless steel with molybdenum. Stabilization prevents sensitization during prolonged high-temperature exposure. Very popular in Germany for chemical, pharmaceutical, and food processing. Being replaced internationally by 316L (1.4404) for most applications.
630 / 17-4PH
1.4542
Precipitation-hardening martensitic stainless steel — the highest-strength stainless in common use. Solution anneal at 1040°C then age at 480-620°C for UTS >1300 MPa. Corrosion resistance similar to 304. Cu+Nb precipitation hardening. Trade names include 17-4PH, SUS630. Used for aerospace structural parts, turbine blades, valve components, nuclear waste casks, medical instruments, and oil/gas equipment.
| 316Ti | 630 / 17-4PH | |
|---|---|---|
| Material Number | 1.4571 | 1.4542 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-3 |
Chemical composition (wt%)
| Element | 316Ti | 630 / 17-4PH | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.07% | OK |
| Si | 0–1% | 0–0.7% | OK |
| Mn | 0–2% | 0–1.5% | OK |
| P | 0–0.045% | 0–0.04% | OK |
Mechanical properties
| Property | 316Ti | 630 / 17-4PH | Unit |
|---|---|---|---|
| tensile_strength | 500–700 | ≥ 1310 | MPa |
| yield_strength | ≥ 200 | ≥ 1170 | MPa |
| elongation | ≥ 40 | ≥ 10 | % |
Compatibility Assessment
316Ti and 630 / 17-4PH have moderate differences (62% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 316Ti the same as 630 / 17-4PH?
316Ti and 630 / 17-4PH have a 62% composition overlap. They are generally not directly interchangeable.
Can I replace 316Ti with 630 / 17-4PH?
Generally not recommended. The compositions differ significantly (62% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 316Ti and 630 / 17-4PH?
The main differences are in the following elements: Cr, Ni. 316Ti is a Stainless Steel grade, while 630 / 17-4PH is a Stainless Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.