16MNCR5/20MNCR5 CASE HARDENING STEEL

16MnCr5/20MnCr5 Steel is defined as Mn-Cr case hardening steel as per EN10084 Standard.Compared with 16MnCr5 steel,20MnCr5 has a little higher on Carbon,Manganese and Chromium,both of them have good hardenability,machinability and wear resistance,but poor in weldability.Through the control of sulfur element, 0.02-0.04%, that is, 16MnCrS5 and 20MnCrS5, good cutting performance can be obtained.

16MnCr5/20MnCr5 steel are suitbale for gears, screws, bolts, bushing and camshafts.

16MnCr5-20MnCr5 Forged block

16MnCr5/20MnCr5 Chemical Composition

GradeNumberCSiMnPSCr
16MnCr51.71310.14-0.19≤ 0.41.0-1.3≤ 0.025≤ 0.0350.8-1.1
16MnCrS51.71390.14-0.19≤ 0.41.0-1.3≤ 0.0250.02-0.040.8-1.1
20MnCr51.71470.17-0.22≤ 0.41.1-1.4≤ 0.025≤ 0.0351.0-1.3
20MnCrS51.71490.17-0.22≤ 0.41.1-1.4≤ 0.0250.02-0.041.0-1.3

16MnCr5/20MnCr5 Related Specifications

DINAFNORBSASTM/SAE
16MnCr516MC5590M175115
20MnCr520MC5-5120

16MnCr5/20MnCr5 Physical Property

Grade16MnCr520MnCr5
Density, g/cm3 7.897.87
Melting point,℃ 14451410
Specific heat capacity，(0~100℃),J/(kg.k) 481477
Linear expansion coefficient,10^-6/k 12.5913.05
Poisson’s ratio0.280.28
Elastic Modulus,Mpa 211000209000
Shear modulus,Mpa 82600821000
Thermal conductivity,W/(m.K) 41(101℃)42(97℃)

16MnCr5/20MnCr5 Heat Treatment & Mechanical Property

16MnCr5/16MnCrS520MnCr5/20MnCrS5
Normalizing,°C840-870840-870
Annealing,°C650-700650-700
Carburizing,°C880-980880-980
Core Hardening,°C860-900860-900
Case Hardening,°C780-820780-820
Tempering,°C150-200150-200

16MnCr5/20MnCr5 Hardness requirements for delivery conditions

Conditions16MnCr5/16MnCrS520MnCr5/20MnCrS5
Treated to improve shearability(+S)-≤255
Soft annealed(+A)≤207≤217
Treated to Hardness range(+TH)156-207170-217
Treated to ferrite-pearlite structure and hardness range(+FP)140-187152-201
Normalized(+N)138-187140-201

16MnCr5/20MnCr5 Hardenability Limits

Distance from quenched end mm1.53.05.07.09.01113152025303540
16MnCr5+H
16MnCrS5+H		Min393631282421-------
Max47464441393735333130292827
20MnCr5+H
20MnCrS5+H		Min41393633302826252321---
Max49494846434241393735343332
16MnCr5+HH
16MnCrS5+HH		Min423935322926242220----
Max47464441393735333130292827
20MnCr5+HH
20MnCrS5+HH		Min44424037343331302826252423
Max49494846434241393735343332
16MnCr5+HL
16MnCrS5+HL		Min393631282421-------
Max44434037343230282625242322
20MnCr5+HL
20MnCrS5+HL		Min41393633302826252321---
Max46464442393736343230292827

16MnCr5/20MnCr5 Mechanical Property -Annealing(+A)

Size,mmTensile,MpaYield,MpaElongation,%Charpy Impact, JBrinell Hardness,HB
Φ3405403152976/72/70152-163
Φ4005953402460/54/50155-179
Φ4605603103264/70/74152-183

16MnCr5/20MnCr5 Steel Quality Certification

A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:
1.Chemical analysis
2.Mechanical properties
3.Surface hardness
4.Non metallic inclusion
5.Heat treatment report
6.Grain size
7.Forging ratio
8.Ultrasonic test report

16MnCr5/20MnCr5 Steel Supply Form & Size

  • Round Bars:  Dia.80 – 1,000mm as Forged
  • Flat / Square Bars:  Thickness Max.800mm
  • Shafts, Rollers, Blocks:  Customized or According to Drawing
  • Rolled Round Bars:  Dia.16 – 130mm with UT Assurance

Heat treatment: Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled

RFQ 16/20MnCr(S)5 STEEL