Z6CNNb18-12B

Z6CNNb18-12B Stainless Steels to NF A 35-578

Z6CNNb18-12B - Specification & Application

• NF A 35-578 - Iron and steel. Stainless steel for high temperature application
• NF A 49-214 - Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Chemical composition(wt.%) of Z6CNNb18-12B grade: to NF A 35-578

Z6CNNb18-12B - Detail

Steel tubes. Seamless austenitic steel tubes for use at high temperatures. Dimensions (with normal tolerances). Technical conditions of delivery

Mechanical properties of grade Z6CNNb18-12B NF A 35-578

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)
227 (≥)	629 (≥)	43	42	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	222

Physical properties of grade Z6CNNb18-12B NF A 35-578

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
445 (≥)	433 (≥)	23	43	31	Solution and Aging, Annealing, Ausaging, Q+T,etc	141
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
926	637	271