X12CrNiMoV12-3, 1.4938


High-Alloy X12CrNiMoV12-3, 1.4938, UNS S64152 Creep resisting steels, nickel and cobalt alloys, oxidation for aviation and cosmonautics acc. to EN 10302(Stainless steels - Part 1: List of stainless steels), EN 10088-1 and EN 10269(Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties)

X12CrNiMoV12-3, 1.4938 - Introduction and Application

X12CrNiMoV12-3, 1.4938 is a High-alloy Cr-Ni-Mo Creep resisting steels, nickel and cobalt alloys with the addition of vanadium for carburization with a martensitic structure, which due to high strength properties and significantly increased resistance to oxidation, is used for the production of aviation propellers, especially loaded gears, ball screws, responsible parts working at elevated temperatures such as rotors and turbine blades, bolts in the power industry, pump components as well as coupling parts in aircraft constructions.Unique composition chemical composition ensures high hardenability, great nawęglonej layer parameters (hardness, toughness), and a clear reduction in deformations arising during heat treatment.Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties is a high-alloy chromium-nickel-molybdenum Creep resisting steels, nickel and cobalt alloys with the addition of vanadium for carburization with a martensitic structure, which due to high strength properties and significantly increased resistance to oxidation, is used for the production of aviation propellers, especially loaded gears, ball screws, responsible parts working at elevated temperatures such as rotors and turbine blades, bolts in the power industry, pump components as well as coupling parts in aircraft constructions.Unique composition chemical composition ensures high hardenability, great nawęglonej layer parameters (hardness, toughness), and a clear reduction in deformations arising during heat treatment.Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties


Melted process

AOD+ESR

Air melted and consumable electrode remelted


X12CrNiMoV12-3, 1.4938 - Chemical composition WT %

GradeChemical Composition WT %
CMnSiPSCrMoNiVN
X12CrNiMoV12-3, 1.4938, 1.49330.08 - 0.150.4 - 0.9Max 0.5Max 0.025Max 0.01511.0 - 12.51.5 - 2.02.0 - 3.00.25 - 0.400.02 - 0.04
X11CrNiMoN120.08 - 0.150.4 - 0.9Max 0.50Max 0.025Max 0.01511.0 - 12.51.5 - 2.02.0 - 3.00.25 - 0.400.02 - 0.04
UNS S64152, AMS 5718, AMS 57190.08 - 0.150.5 - 0.9Max 0.35Max 0.025Max 0.02511.0 - 12.51.5 - 2.02.0 - 3.00.25 - 0.400.01 - 0.05
Z12CNDV12-03, X13VD0.08 - 0.150.5 - 0.9Max 0.35Max 0.030Max 0.01511.0 - 12.51.5 - 2.02.0 - 3.00.25 - 0.400.02 - 0.04
10Cr12Ni3Mo2VN, S472500.08 - 0.130.5 - 0.9Max 0.40Max 0.030Max 0.02511.0 - 12.51.5 - 2.02.0 - 3.00.25 - 0.400.02 - 0.04

Mechanical Property of X12CrNiMoV12-3, 1.4938


Physical Property of X12CrNiMoV12-3, 1.4938

Tensile strength, Rm: 930 - 1130 MPa 

Yield point, Re: Min 760 MPa 

Elongation, A: Min 14% 

Impact, KV20℃: Min 40 J 

Contraction, Z: Min 40% 

Hardness annealed: approximation 250 HB



Heat Treatment of X12CrNiMoV12-3, 1.4938

  • Att temperature of 660 - 690 ℃
  • Tempering in oil at temperatures of 1030 - 1060 ℃ with cooling to -65 ℃, after which tempering is carried out at a temperature of about 220 - 280 ℃
  • Hardening with air cooling in the temperature range of 1040 - 1060 ℃ with tempering at temperatures 600-700 ℃
  • Carburizing at temperatures around 950 ℃

Equivalent grades of X12CrNiMoV12-3, 1.4938

X12CrNiMoV12-3, X 12 CrNiMoV 12-3, 1.4938, 1.4933, 4938, 4933, X12CrNiMo12, X 12 CrNiMo 12, 1.4939, X11CrNiMoN12, S 64152, S61452, AMS 5719, AMS 5718, Z12CNDV12-03, Z 12 CNDV 12-03, Z12CNDV12, EZ12CNDV12, X13V.D, X13VD, CX13VD, M152, S.151, 12Cr12Ni2Mo, 414MV, M-152, 10Cr12Ni3Mo2VN, 1Cr12Ni3Mo2VN, UNS K64152,  XM-32.