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Ten Mind-Blowing Reasons Why DIN1.6773 36CrNiMo16 35NCD16 835M30 EN30B Steel Is Using This Technique For Exposure.


Quenched and Tempered 35NCD16 835M30 EN30B DIN1.6773 36CrNiMo16 Steel 36crnimo16 steel Quenched and Tempered 35NCD16 835M30 EN30B DIN1.6773 36CrNiMo16 Steel Quenched and Tempered 35NCD16 835M30 EN30B DIN1

Quenched and Tempered 35NCD16 835M30 EN30B DIN1.6773 36CrNiMo16 Steel
Applications:

The applications of 36CrNiMo16 Steel are numerous and includes the following:

  • In Engineering: ultra high tensile applications, shafts, gears, bolts, spline shafts, crusher shafts, eccentric shafts, hard wearing bushes and high impact pistons
  • In mining: rock drill, knock off bits, mill hammers, cyclone plates, high tensile mechanical and thermal shock applications
  • In Tooling: plastic extrusion dies, die bolster rings and punches
Quality Standard:

BS EN10250 Open die forging for general engineering purposes
ASTM A788 Standard Specification for Steel Forgings, General Requirements

All Grades Comparison:

ENMaterial No.BSNF
36CrNiMo161.6773835M30/EN30B35NCD16
Chemical Composition(%):
CMnSiPSCrNiMo
0.32-0.390.30-0.600.40 max0.030 max0.025 max1.60-2.003.60-4.100.25-0.45
Mechanical Properties(In Nomalized Condition):
Dia/Thickness(mm)Tensile Strength Rm (Mpa)Yield Strength R2 (Mpa)Elongation (longitudinal direction) Al (%)Elongation (transverse direction) At (%)Impact properties (KV J) (longitudinal)Impact properties (KV J) (transverse)
160 max1000 min800 min11 min8 min45 min22 min
160-3301000 min800 min11 min8 min45 min22 min
330-6601000 min800 min11 min8 min45 min22 min
Dimension Tolerance Standard:  DIN 7527
Ultrasonic Test: SEP 1921 C/c or specific FBH eq.

Heat Treatment:
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each EN30B steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of this 4.25% nickel alloy steel.

ForgingHeat the steel carefully to the forging temperature of 1000-1100°C, soak well. After forging, cool slowly in a furnace to 100°C maximum and anneal immediately.
AnnealingTo obtain the softest condition heat carefully to 630-650°C. Soak for a minimum of 2 hours, then cool in the furnace or in air. It is advisable to repeat this treatment to obtain the best machining characteristics.
Stress RelievingWhere the machining operations have been severe, we recommend stress relieving EN30B alloy steel before finish machining and hardening. Heat carefully to 630-650°C then cool in the furnace or in still air.
HardeningHeat uniformly to 810-830°C and when thoroughly soaked at this temperature cool in air or quench in oil according to mass. Hardening from neutral salt baths will help to prevent scaling or decarburisation and is strongly recommended. Pre heat at 300-400°C, raise to the hardening temperature of 810-830°C, quench into salt standing at 300-320°C.  Withdraw and cool in air. Alternatively, tools may be vacuum hardened. If desired, hardened and tempered tools can be cyanide hardened to give a shallow carburised case to die surfaces with increased hardness values up to Rockwell C56-60. Temper as soon as tools are hand-warm.
TemperingRe heat to the relevant tempering temperature. Soak for at least 2 hours per 25mm of ruling section. Withdraw from the furnace and cool in still air. Tempering between 275-450°C is not advised as tempering within this range will reduce the impact value.
Tempering °C   150 250 350 450
HRc                       49 47 44 38
Mill´s test certificate:

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.