Advanced martensitic stainless steel with nickel and molybdenum additions providing exceptional low-temperature toughness and superior corrosion resistance.
Excellent notch ductility down to -60°C (-76°F)
Reduced cracking risk in thick sections
Ni & Mo additions improve performance
Superior welding characteristics for fabrication
Ni & Mo additions provide superior properties
| Property | F6NM | 410 | 420 Mod | Advantage |
|---|---|---|---|---|
| Sub-Zero Toughness | Excellent | Poor | Fair | Ni & Mo additions provide superior low-temperature performance |
| Crack Resistance | Excellent | Fair | Good | Air hardening with reduced cracking risk in thick sections |
| Weldability | Excellent | Good | Good | Superior welding characteristics |
| Corrosion Resistance | Excellent | Good | Good | Enhanced by Ni & Mo content |
UNS S41500 - Enhanced 13Cr + Ni + Mo
| Element | Min | Max |
|---|---|---|
| Carbon(C) | - | 0.06 |
| Silicon(Si) | - | 0.50 |
| Manganese(Mn) | 0.50 | 1.00 |
| Phosphorus(P) | - | 0.030 |
| Sulfur(S) | - | 0.030 |
| Chromium(Cr) | 11.50 | 14.00 |
| Nickel(Ni) | 3.50 | 5.50 |
| Molybdenum(Mo) | 0.50 | 1.00 |
| Iron(Fe) | Balance | Balance |
CVN Impact Performance
| Temperature | CVN Impact | Performance |
|---|---|---|
| Room Temperature | 50+ J | Excellent |
| 0°C (32°F) | 45+ J | Excellent |
| -29°C (-20°F) | 42+ J | Very Good |
| -60°C (-76°F) | 40 J Min | Good |
| -75°C (-103°F) | 35+ J | Acceptable |
HOWCO Enhanced vs Standard Conditions
| Condition | UTS | Yield | Elongation | Hardness | Application |
|---|---|---|---|---|---|
| ASTM A182 Standard | 95 KSI Min | 95 KSI Min | 18% | Variable | Standard applications |
| NACE MR0175 Limited | 95 KSI Min | 75 KSI Max | 18% | 23 HRC Max | Sour service |
| HOWCO Enhanced | 95 KSI Min | 85 KSI | 18% | ≤23 HRC | Optimized performance |
| Environment | Resistance | Notes |
|---|---|---|
| Sweet Service | Excellent | Standard oilfield applications |
| Sour Service (NACE) | Excellent | Approved with hardness limitations |
| CO2 Environments | Excellent | Superior to standard martensitic grades |
| Sub-Zero Service | Excellent | Outstanding low-temperature toughness |
| Chloride Environments | Very Good | Enhanced by Mo content |
| Marine Environments | Good | Suitable for offshore applications |
Self-hardening in air from austenitizing temperature
Reduces quench cracking risk, especially in thick sections
Excellent hardenability through large cross-sections
Uniform properties in heavy wall applications
Reduced thermal stress during heat treatment
Minimized distortion and improved dimensional stability
Optimized heat treatment for hardness control
Reliable NACE MR0175 qualification
Basic martensitic with lower alloy content
Higher carbon martensitic grade
Enhanced martensitic with higher alloy content
Leverage the superior low-temperature toughness and enhanced corrosion resistance for your critical valve and pressure equipment applications.