1.4903

1.4903 Stainless Steels to EN 10302: 2008

1.4903 - Specification & Application

• EN 10302: 2008 - Creep resisting steels, nickel and cobalt alloys
• EN 10028-2: 2009 - Flat products made of steels for pressure purposes. Non-alloy and alloy steels with specified elevated temperature properties
• EN 10222-2: 2000 - Steel forgings for pressure purposes. Ferritic and martensitic steels with specified elevated temperature properties
• EN 10216-2: 2014 - Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties
• EN 10253-2: 2007 - Butt-welding pipe fittings. Non alloy and ferritic alloy steels with specific inspection requirements
• EN 10088-1: 2005 - Stainless steels. List of stainless steels

Alloy special martensitic creep-resisting steel

Chemical composition(wt.%) of 1.4903 grade: to EN 10302: 2008

1.4903 - Detail

1.4903

Mechanical properties of grade 1.4903 EN 10302: 2008

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)
525 (≥)	817 (≥)	32	13	23	Solution and Aging, Annealing, Ausaging, Q+T,etc	321

Physical properties of grade 1.4903 EN 10302: 2008

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
518 (≥)	963 (≥)	41	43	31	Solution and Aging, Annealing, Ausaging, Q+T,etc	333
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
588	862	398