18CrNiMo7-6 forged round bar DIN1.6587 gear steel bar 17CrNiMo6
18CrNiMo7-6 is a case hardening steel with high toughness. There are a number of variants with high cleanliness requirements. All variants possess tighter composition ranges compared to the standard. One variant is produced with the quality class IQ (isotropic quality). This ensures a very low number of elongated sulphide inclusions which will give more isotropic properties. The high oxidic cleanliness will enable the steel to meet the same high cleanliness demands as for re-melted qualities.
Forged Round Bar 18CrNiMo7-6 DIN 1.6587 Product features
| Material | 18CrNiMo7-6,Din1.6587 17CrNiMo7-6 |
| Type | Forged |
| Diameter | φ150-1500mm |
| Length | Max 10000mm (10m) |
| Surface | Black, peeled, polishing, bright, sand blast, etc. |
| Application | Transmission gear, wind power gear ,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.. |
Forged Round Bar 18CrNiMo7-6 DIN 1.6587 Chemical Compostion
| Standard | Grade | C | Si | Mn | P | S | Ni | Cr | Mo |
| EN 10084 | 18CrNiMo7-6 | 0.15-0.21 | ≤ 0.4 | 0.50-0.90 | ≤ 0.025 | ≤ 0.035 | 1.4-1.7 | 1.5-1.8 | 0.25-0.35 |
| 1.6587 |
Forged Round Bar 18CrNiMo7-6 DIN 1.6587 Mechanical properties
18CrNiMo7-6 has many grade, with different heat treatment process, different grade will have different performance on mechanical properties.Grade 159A - Variant with low sulphur content and high cleanliness demandsGrade 159B - Variant with controlled sulphur content for consistent machinability and +H hardenabilityGrade 159Q - Isotropic properties (IQ) and better fatigue strength due to higher cleanliness levels, and a finer size and distribution of non-metallic inclusionsGrade 159X - Variant with controlled sulphur content for consistent machinability and +H hardenabilityGrade 159S - Variant with increased sulphur content.Grade 4761(MoCN216) - Low sulphur variant of Imatra.
Forged Round Bar 18CrNiMo7-6 DIN 1.6587 Equivalent grades
| EN 10084 | Steel No. | ISO 683-11:1987 | Germany | Finland |
| 18CrNiMo7-6 | 1.6587 | 18CrNiMo7 | 17CrNiMo6 | 511 |
Forged Round Bar 18CrNiMo7-6 DIN 1.6587 Heat Treatment
Normalizing:850 – 880°C/airSoft annealing:650 – 700°C/furnaceStress relieve:630- 650oCCarburising:880 – 980°CCore hardening:830 – 870°C/waterIntermediate annealing:630 – 650°CCase hardening:780 – 820°C/waterTempering:150 – 200°C
