X7CrNiMoBNb16-16

X7CrNiMoBNb16-16 Stainless Steels to DIN 17240 (1976)

X7CrNiMoBNb16-16 - Specification & Application

  • DIN 17240 (1976) - Heat Resisting and Highly Heat Resisting Materials for Bolts and Nuts; Quality Specifications
  • DIN EN 10088-1 - Stainless steels - Part 1: List of stainless steels
  • DIN EN 10269 - Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
  • WB 113/1 (2001) - Heat resistant austenitic rolled and forged steel, X 8 CrNiMoBNb 16 16, WN 1.4986
  • WB 113/2 (2001) - Heat resistant austenitic rolled and forged steel, CrNiMoBNb X 8 16 16, WN 1.4986

Heat Resisting and Highly Heat Resisting Materials for Bolts and Nuts

Chemical composition(wt.%) of X7CrNiMoBNb16-16 grade: to DIN 17240 (1976)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.04 0.10
Si 0.30 0.60
Mn - 1.50
P - 0.045
S - 0.030
Cr 15.5 17.5
Ni 15.5 17.5
Mo 1.60 2.00
B 0.05 0.10
Other - Nb / Ta ≥10*C ≤1.20

X7CrNiMoBNb16-16 - Detail

DIN 17240 (1976) Heat Resisting and Highly Heat Resisting Materials for Bolts and Nuts; Quality Specifications; Replaced by DIN EN 10269:1999

Mechanical properties of grade X7CrNiMoBNb16-16 DIN 17240 (1976)

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)
464 (≥) 837 (≥) 21 21 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical properties of grade X7CrNiMoBNb16-16 DIN 17240 (1976)

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
394 (≥) 368 (≥) 34 31 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 432
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
221 194 723

Equivalent Grade

1 EN X7CrNiMoBNb16-16 2 1.4986 3 X8CrNiMoBNb16-16 4 X7CrNiMoBNb16-16

Equivalent Products

1 ESR 1.4986 Round Bar

Product shapes we supply:

We can customize the production of X7CrNiMoBNb16-16 grade, contact us for the best solution.
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