23MnNiMoCr5-4, 23MnNiCrMo5-3 - steel for mining chain links

23MnNiCrMo5-2, 1.6541, 23MnNiCrMo5-3, 1.6540, 23MnNiMoCr5-4, 1.6758 - Structural alloy steel used for mining chain links according to PN-H-93028, PN-H-84023, DIN 17115.

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Mo: Ni: Al: Cu: N: As:
PN
PN-H-84023/08
23GHNMA
0.20 - 0.26 1.00 - 1.25 0.15 - 0.35 <0.025 <0.025 0.4 - 0.6 0.2 - 0.3 0.4 - 0.7 0.02 - 0.07 <0.2 - -
PN 23G2NMHA
0.20 - 0.26 1.10 - 1.40 0.15 - 0.25 <0.020 <0.020 0.4 - 0.6 0.5 - 0.6 0.9 - 1.1 0.02 - 0.05 <0.2 <0.012 <0.012
DIN 23MnNiCrMo5-2 - 1.6541
0.20 - 0.26 1.10 - 1.40 <0.25 <0.02 <0.015 0.4 - 0.6 0.2 - 0.3 0.4 - 0.7 0.025 - 0.050 <0.2 <0.012 -
AFNOR 23MNCD5 - 23 MNCD 5 
0.20 - 0.26 1.10 - 1.40 0.10 - 0.35 <0.03 <0.025 0.4 - 0.6 0.2 - 0.3 0.4 - 0.7 >0.02 - - -
STAS 24 MoCrNiMn 15z - 24MoCrNiMn15z
0.21 - 0.26 1.40 - 1.70 0.17 - 0.37 <0.025 <0.020 0.4 - 0.7 0.2 - 0.3 0.4 - 0.7 0.02 - 0.05 - - -
DIN 23MnNiCrMo5-3 - 1.6540
0.20 - 0.26 1.10 - 1.40 <0.25 <0.02 <0.015 0.4 - 0.6 0.2 - 0.3 0.7 - 0.9 0.025 - 0.050 <0.2 <0.012 -
DIN 23MnNiMoCr5-4 - 1.6758
0.20 - 0.26 1.10 - 1.40 <0.25 <0.02 <0.015 0.4 - 0.6 0.5 - 0.6 0.9 - 1.1 0.025 - 0.050 <0.2 <0.012 -

23GHNMA - Application and specification

23GHNMA is a structural alloy steel for thermal improvement of mining chains produced by cold bending and flash welding.

Mechanical and physical properties of 23GHNMA steel

General minimum mechanical properties after thermal improvement
Tensile strength  Rm 1130 MPa
Yield point Re 1030 MPa
Elongation A5 10%
Contraction Z 45%
Impact resistance at the temp. of 20℃ 59 J/cm2
Hardness in softened state max. 187 HB
Density ρ 7,85 kg/dm³
Mechanical properties Properties for individual dimensions
<10mm 10 - 20mm 20 - 40mm
Tensile strength Rm > 1200 MPa > 1180 MPa > 1050 MPa
Yield point Re > 1080 MPa > 1060 MPa > 990 MPa
Elongation A5 > 12% > 10% > 10%
Contraction Z > 50% > 50% > 50%
Notch toughness KV > 60 J > 60 J > 60 J

In 23GHNMA and equivalents Company supply:

Substitutes, equivalents and other species designations

23G2NMHA
23GHNMVTA
23G2NMHVTA
23MnNiCrMo5-2
1.6541
23MNCD5
23 MNCD 5
24 MoCrNiMn 15z
24MoCrNiMn15z
23MnNiCrMo5-3
1.6540
23G2NMA
23MnNiMoCr5-4
1.6758

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