Martensitic Stainless Steel Grades
Martensitic Grade Comparison Chart:
| China GB | ISO Unified Digital Code | ASTM | UNS Code | EN Code | Company Commercial Grade |
| 06Cr13 | S41008 | 410S | S41008 | 1.4 | – |
| 12Cr13 | S41010 | 410 | S41000 | 1.4006 | – |
| 20Cr13 | S42020 | 420 | S42000 | 1.4021 | API/13Cr L80 |
| 30Cr13 | S42030 | 420J2 | S42000 | 1.4028 | – |
| 14Cr17Ni2 | S43110 | 431 | S43100 | – | – |
| 05Cr17Ni4Cu4Nb | S51740 | 17-4PH | S17400 | 1.4542 | |
| 06Cr13Ni4Mo | – | S41500 | 1.4313 | F6NM | |
| 0Cr16Ni5Mo1N | – | – | – | 1.4418 | – |
| 00Cr17Ni5Mo2Cu | – | 17Cr110/125 | – | – | SM17CRS(NSSMC) |
Martensitic Stainless Steel Grades
| Alloy (UNS Designation) | End Use | Composition nominal wt% | Specifications | Density lb/in3 (g/cm³) | Tensile Strength ksi. (MPa) | 0.2% Yield Strength ksi. (MPa) | Elong- ation % | Hardness |
| AL 403 S40300 | Turbine blades, banding, strapping and hose clamps | C 0.15 max, Mn 1.0 max, Si 0.5 max, Cr 11.5-13.0, Ni 0.6 max, P 0.04 max, S 0.03 max, Fe Balance | ASTM A176 AMS QQ5763 | 0.280 (7.75) | 70 min (485 min) | 30 min (205 min) | 25 min | 96 Rockwell B max |
| 410 S41000 | Cutlery, dental and surgical instruments, nozzles, valve parts, hardened steel balls and seats for oil well pumps, separating screens and strainers, springs, shears, and wear surfaces | C 0.08-0.15, Mn 1.0 max, P 0.04 max, S 0.03, Si 1.0, Cr 11.5-13.5, Ni 0.75 max, Fe Balance | ASTM A240 | 0.276 (7.65) | 65 min (450 min) | 30 min (205 min) | 20 min | 96 Rockwell B max (Annealed) 38-45 RC (Hardened) |
| 416 S41600 | Cutlery, dental & surgical instruments | C 0.15 max, Mn 1.25 max, Si 1.0 max, Cr 12.0-14.0, P 0.06 max, S 0.15 min, Mo 0.60 max, Fe Balance | ASTM A895 ASTM A194 AMMS 55610 SAE J405 | 0.280 (7.74) | 75-90 (517-621) | 40-50 (276-345) | 15-30 | 38-45 Rc (Hardened) |
| AL 418 SPL S41800 | Engine braces, turbine exhaust components, exhaust struts, stiffeners, ducts | C 0.15-0.20, Cr 12.0-14.0, Mn 0.50 max, Ni 1.8-2.2, P 0.04 max, S 0.03 max, Si 0.50 max, W 2.5-3.5, Fe Balance | AMS 5508 | 0.284 (7.87) | 130 (900) | 105 (725) | 20 | 25-50 Rockwell C (Hardened) |
| 420 S42000 | Cutlery, Dental and surgical instruments, nozzles, valve parts, hardened steel balls and seats for oil well pumps, separating screens and strainers, springs, shears, and wear surfaces | C 0.15 min, Mn 1.0 max, Si 1.0 max, Cr 12.0-14.0, Ni 0.75 max, Mo 0.5 max S 0.03 max, P 0.04 max, Fe Balance | ASTM A176 | 0.280 (7.74) | 85 (586) | 45 (310) | 29 | 53-57 Rockwell C (Hardened) |
| 440A S44002 | Cutlery, dental and surgical instruments, nozzles, valve parts, hardened steel balls and seats fro oil well pumps, separating screens and strainers, springs, shears, and wear surfaces | C 0.60-0.75, Mn 1.0 max, Si 1.0 max, Cr 16.0-18.0, Mo 0.75 max, S 0.03 max, P 0.04 max, Fe Balance | ASTM A276 | 0.279 (7.72) | 104 (717) | 62 (427) | 20 | 57-60 Rockwell C (Hardened) |
| 440C S44004 | Bearings, valve parts, cutlery and industrial knives | C 0.95-1.20, Mn 1.0 max, Si 1.0 max, Cr 16.0-18.0, Mo 0.75 max, S 0.03 max, P 0.04 max, Fe Balance | ASTM A276 AMS 5630 QQ-S-763 | 0.277 (7.68) | 110 (760) | 65 (450) | 15 | 58-61 Rockwell C (Hardened |
| Martensitic and Precipitation Hardening Steel Comparison Table | |
| Martensitic Stainless Steel for Knife Applications – Part 1: Fe-Cr-C |
