1Cr12Ni3Mo2VN

1Cr12Ni3Mo2VN Stainless Steels to GJB 2295A

1Cr12Ni3Mo2VN - Specification & Application

• GJB 2295A - Specification for stainless steel cold rolled sheet for aviation

Specification for stainless steel cold rolled sheet for aviation

Chemical composition(wt.%) of 1Cr12Ni3Mo2VN grade: to GJB 2295A

1Cr12Ni3Mo2VN - Detail

1Cr12Ni3Mo2VN is a new type of martensitic stainless steel for the last-stage blades of large-capacity nuclear and thermal power turbines. The deformation behavior of this steel was studied by thermal compression experiments that performed on a Gleeble-3500 thermal simulator at a temperature range of 850°C to 1200°C and a strain rate of 0.01s-1 to 20s-1. When the deformation was performed at high temperature and low strain rate, a necklace type of microstructures was observed, the plastic deformation mechanism is grain boundary slip and migration, when at low temperature and lower strain rate, the slip bands were observed, the mechanism is intracrystalline slips, and when at strain rate of 20s-1, twins were observed, the mechanism are slips and twins. The Arrhenius equation was applied to describe the constitutive equation of the flow stress. The accuracy of the equation was verified by using the experimental data and the correlation coefficient R2 = 0.9786, and the equation can provide reasonable data for the design and numerical simulation of the 1Cr12Ni3Mo2VN forging process.

Mechanical properties of grade 1Cr12Ni3Mo2VN GJB 2295A

Proof strength Rp0.2 (MPa)	Tensile strength Rm (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
745 (≥)	563 (≥)	23	13	41	Solution and Aging, Annealing, Ausaging, Q+T,etc	323

Physical properties of grade 1Cr12Ni3Mo2VN GJB 2295A

Property	Density kg/dm3	Temperature T °C/F	Specific heat J / kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm	Modulus of elasticity kN/mm2	Expansion rate
911 (≥)	834 (≥)	23	34	31	Solution and Aging, Annealing, Ausaging, Q+T,etc	233
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
737	618	724