| Material Type | Common Grades (CN/EN/ASTM) | Pressure Range | Corrosion Resistance | Strength Characteristics | Typical Applications |
| Aluminum Alloy | 6061-T6 / EN AW-6061 / ASTM 6061 | ≤21 MPa | Excellent (1000 h salt spray after anodizing) | Yield 240 MPa, 40 % lighter, weldable | Mobile arms, battery-cooling manifolds |
| Aluminum Alloy | 7075-T6 / EN AW-7075 / ASTM 7075 | ≤35 MPa | Good (needs sealed hard-anodizing) | Yield 500 MPa, 25 % lighter than 6061 | Aerospace valves, ultra-light test benches |
| Stainless Steel | 304/304L / EN 1.4301 / ASTM 304 | ≤35 MPa | Very good (general seawater) | Yield 210 MPa, excellent weldability | Food, pharma, indoor manifolds |
| Stainless Steel | 316/316L / EN 1.4404 / ASTM 316 | ≤42 MPa | Excellent (1000 h seawater) | Yield 220 MPa, ultra-low carbon weldable | Marine, chemical, cryogenic valves |
| Stainless Steel | 17-4PH / EN 1.4542 / ASTM 630 | ≤42 MPa |
Very good (precipitation hardened) | Yield 1100 MPa, HRC 40 after H1150 | Ultra-high-pressure servo manifolds |
| Carbon/Alloy Steel | 20# / A105 / ASTM A105 | ≤16 MPa | Fair (72 h phosphating) | Yield 245 MPa, excellent weldability | Low-pressure welded manifolds |
| Carbon/Alloy Steel | 45# / 1045 / ASTM 1045 | ≤25 MPa | Fair (Ni-P plating 1000 h) | Yield 355 MPa, good machinability | Machine-tool medium-pressure blocks |
| Carbon/Alloy Steel | 42CrMo / 4140 / ASTM 4140 | ≤42 MPa | Good (Ni-P plating 1000 h) | Yield 850 MPa, HRC 22-28 after Q+T | High-pressure servo blocks, test rigs |
| Cast Iron | QT500-7 / 65-45-12 / FCD500 | ≤35 MPa | Fair (500 h paint) |
Fatigue 700 MPa, good vibration damping | Mining, large-flow manifolds |
| Cast Iron |
HT250 / GG-25 / FC250 / 40B | ≤16 MPa | Fair (paint only) | Compressive 250 MPa, lowest cost | Base plates, housings |
