How to convert KSI to MPa
If you need to verify a calculation manually, the conversion factor is constant. Kilopound per Square Inch (KSI) is an imperial unit, while Megapascal (MPa) is the metric standard.
Formula: KSI to MPa
MPa = KSI × 6.895
Example: For a high-performance material like Super Duplex with a yield strength of 80 KSI, the calculation is: 80 × 6.895 = 551.6 MPa.
| KSI (Input) | MPa (Result) | Material (Reference) |
|---|---|---|
| 30 KSI | 205 MPa | Austenitic (316L) |
| 65 KSI | 450 MPa | Duplex (2205) |
| 80 KSI | 550 MPa | Super Duplex (S32750) |
| 105 KSI | 725 MPa | 17-4 PH (Cond. H1150D) |
| 120 KSI | 828 MPa | Titanium Grade 5 |
Convert MPa to N/mm²
Many engineers also ask: “How do I convert Megapascals to Newton per square millimeter?” The answer is simple: The ratio is 1:1. However, standards often differ, with N/mm² being preferred in European norms (DIN/EN) and MPa in international standards (ASTM).
Formula: MPa to N/mm²
1 MPa = 1 N/mm²
| MPa (Megapascal) | N/mm² (Newton/mm²) | Example |
|---|---|---|
| 220 MPa | 220 N/mm² | Yield Str. 316L |
| 450 MPa | 450 N/mm² | Yield Str. Duplex (2205) |
| 828 MPa | 828 N/mm² | Yield Str. Titanium Grade 5 |
Frequently Asked Questions
+ What is the difference between KSI and PSI?
KSI stands for “Kilo-pound per Square Inch”. 1 KSI equals 1,000 PSI. The unit is commonly used in the US for high-strength materials to avoid writing large numbers.
+ How do I convert MPa to KSI?
To convert Megapascals to KSI, you divide the MPa value by 6.895 (or multiply by 0.145). Example: 550 MPa ÷ 6.895 ≈ 80 KSI.
+ Is 1 N/mm² the same as 1 MPa?
Yes, physically they are identical. 1 Pascal is defined as 1 Newton per square meter (N/m²). Since “Mega” stands for a million, and a square meter contains 1,000,000 square millimeters, the factors cancel out. Therefore: 1 MPa = 1 N/mm².
+ Which grade has the highest KSI?
Among our stock materials, Titanium Grade 5 offers the highest minimum yield strength (120 KSI / 828 MPa), surpassing even the standard condition of 17-4 PH.
Looking for high-strength alloys? View our stock of Titanium and 17-4 PH.