Description

1.6587 Steel Suppliers - 18CrNiMo7-6 Case Hardening Steel

DIN 1.6587 Steel is a low carbon,case hardening (carburizing) steel which contains 1.8% chromium – nickel – molybdenum as strengthening agents as per EN 10084. Characterised by high core strength and toughness in medium to large sections with case hardness up to Rc62 when carburized, hardened and tempered,and it is also used in area of heavy and high strained gear parts with high demands on toughness at core tensile of 1050–1350N/mm2.DIN1.6587/18CrNiMo7-6 is same as 17CrNiMo6 steel,generally supplied in the annealed condition with a maximum brinell hardness of 229 (Rc22).

Chemical Composition of 1.6587 Case Hardening Steel

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
EN 10084	18CrNiMo7-6	0.15-0.21	0.50-0.90	≤ 0.025	≤ 0.035	≤ 0.04	1.4-1.7	1.5-1.8	0.25-0.35
	1.6587

18CrNiMo7-6 Steel Mechanical Property

Size mm	≤ 11	12-30	31-63
R Mpa	1180-1420	1080-1320	980-1270
Rp 0.2 Mpa	≥ 835	≥785	≥ 685
A %	≥ 7	≥ 8	≥ 5
C %	≥ 30	≥ 35	≥ 35
Kv J	≥ 44	≥ 44
Hardness HB	354-406	327-384	295-373

Forging

DIN 1.6587 | 17CrNiMo6 |18CrNiMo7-6 forging temperature:900 – 1100°C,cool slowly in the sand after forged.

Heat Treatment

Normalizing:850 – 880°C/air
Soft annealing:650 – 700°C/furnace
Stress relieve:630- 650oC
Carburising:880 – 980°C
Core hardening:830 – 870°C/water
Intermediate annealing:630 – 650°C
Case hardening:780 – 820°C/water
Tempering:150 – 200°C

Surface Hardness

Treated to improveshearability(+S):Max 255HB
Soft annealed(+A):Max 229HB
Treated to hardness range(+TH):179-229HB
Treated to ferrite-pearlite structure and hardness range(+FP):159-207HB

Application for Material 6587 Alloy Steel

DIN 1.6587 | 17CrNiMo6 | 18CrNiMo7-6 steel for the parts which require core tensile strength and high hardness. Susceptible to the large seized parts with high wearing resistance and loading such as: Heavy Duty Bushings and Bearings, Cam Followers, Clutch Dogs, Compressor Bolts, Extractors, Fan Shafts, Heavy Duty Gears, Pump Shafts, Sprockets, Tappets, Wear Pins, Wire Guides etc..

More detail about E STEEL SDN. BHD.