Chemical composition % of the ladle analysis of steel grade:20NiCrMoS6-4

C(%)	Si(%)	Mn(%)	P(%)	S(%)	Cr(%)
0.16-0.23	Max 0.40	0.50-0.90	Max 0.035	0.020-0.040	0.60-0.90
Ni(%)	Mo(%)	Ti(%)	V(%)	W(%)	Nb(%)
1.40-1.70	0.25-0.35
Co(%)	Cu(%)	Al(%)	B(%)	N(%)	Other

 

Process:  EAF+LF+VD+Forged Treatment(optional)

 

SIZE RANGE: 

Round:   

Hot Forged:  50mm-2000mm 

Flat:

Hot forged: Thickness:50-600mm Width: up to 1600mm 

 

SURFACE FINISHES: 

Black, Turned & Grinded

 

Test: Ultrasonic test according to SEP 1921-84 C/c, D/d, E/e

 

Heat Treatment

 

Annealing, Normalizing, Quenching, Tempering

 

 

Mechanical Properties

Properties		Conditions
		T (°C)	Treatment
Density (×1000 kg/m3)	7.7-8.03	25
Poisson's Ratio	0.27-0.30	25
Elastic Modulus (GPa)	190-210	25
Tensile Strength (Mpa)	1158	25	oil quenched, fine grained, tempered at 425°C
Yield Strength (Mpa)	1034
Elongation (%)	15
Reduction in Area (%)	53
Hardness (HB)	335	25	oil quenched, fine grained, tempered at 425°C

 

THERMAL PROPERTIES

Properties		Conditions
		T (°C)	Treatment
Thermal Conductivity (W/m-K)	42.7	100
Specific Heat (J/kg-K)	477	50-100

 

HYSICAL PROPERTIES

Quantity	Value	Unit
Thermal expansion	16 - 17	e-6/K
Thermal conductivity	16 - 16	W/m.K
Specific heat	500 - 500	J/kg.K
Melting temperature	1370 - 1400	°C
Service temperature	0 - 500	°C
Density	8000 - 8000	kg/m3
Resistivity	0.7 - 0.7	Ohm.mm2/m