DIN 1.4870

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DIN 1.4870

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1.4870 Application:Valve steel

Chemical composition(mass fraction)(wt.%) of the 1.4870
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) N(%) Other(%)
0.48-0.58 Max 0.45 8.00-10.00 Max 0.045 Max 0.030 20.00-22.00 3.25-4.50 0.38-0.50 Nb+Ta 2.00-3.00,C+NMix 0.90

Mechanical properties of grade 1.4870

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
136 (≥) 223 (≥) 44 13 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical properties of grade 1.4870

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
933 (≥) 721 (≥) 11 44 14 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2		 - - -
549 656 292 - - -

1.4870 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED