14NiCrMo13-4, 1.6657, AISI 9310 - case-hardening steel

14NiCrMo13-4, 1.6657, 655M13 - Case-hardening alloy steel for carburizing

Standard	Steel Grade
	Chemical composition %
	C:	Mn:	Si:	P:	S:	Cr:	Mo:	Ni:	N:	V:	Ti:	Cu:	W:
PN	12H2N4A
PN	0.09 - 0.16	0.30 - 0.60	0.17 - 0.37	<0.030	<0.025	1.25 - 1.65	-	3.25 - 3.65	-	-	-	<0.2	-
GOST	12Ch2N4A - 12Kh2N4A - 12Х2Н4А
GOST	0.09 - 0.15	0.30 - 0.60	0.17 - 0.37	<0.025	<0.025	1.25 - 1.65	<0.15	3.25 - 3.65	<0.008	<0.05	<0.03	<0.3	<0.2
BS	655M13 - EN36A - EN36B - N3CCH - 36A - 36 A
BS	0.10 - 0.16	0.35 - 0.60	-	<0.035	<0.035	0.70 - 1.00	<0.1	3.00 - 3.75	-	-	-	<0.4	-
AFNOR	16NCD17 - 16 NCD 17
AFNOR	0.12 - 0.18	<0.50	<0.50	<0.030	<0.025	1.00 - 1.40	0.15 - 0.45	4.00 - 4.50	-	-	-	-	-
AFNOR	16 NC 12 - 16NC12
AFNOR	0.12 - 0.18	<0.50	<0.50	<0.030	<0.025	0.50 - 1.00	-	3.00 - 3.50	-	-	-	-	-
ISO	14 Ni 14 - 14Ni14
ISO	<0.17	<0.70	<0.30	<0.025	<0.02	<0.3	<0.12	3.25 - 3.75	-	<0.05	<0.03	<0.4	-
EN / LW	14NiCrMo13-4 - 1.6657 - LW 6657
EN / LW	0.11- 0.17	0.30 - 0.60	0.30 - 0.60	<0.025	<0.035	0.80 - 1.10	0.20 - 0.30	3.00 - 3.50	-	-	-	-	-
UNS AMS SAE	AMS-S-8503 - AISI 3310 - E 3310
UNS AMS SAE	0.08 - 0.13	0.45 - 0.60	0.20 - 0.35	<0.025	<0.025	1.40 - 1.75	-	3.25 - 3.75	-	-	-	-	-

14NiCrMo13-4, 1.6657, 12H2N4A - Nickel construction steel without molybdenum for aerospace carburization - characteristics

Steel for heat-chemical treatment - carburization is characterized by low hardness, high durability and malleability. The chemical composition contains increased content of nickel and chromium in relation to 15NiCr13 grade. Designed for sections with intermediate dimensions, exposed to large and variable loads and associated work stresses.

Used, among others, in aviation, in parts and components of internal combustion engines and aviation equipment. Thanks to its properties, it is also used for very important components of machines or vehicles - as steering shafts, adjusting screws, gears, rollers or axles.

14NiCrMo13-4 steel is its equivalent. It has similar values and chemical composition of 15NiCr13 steel, but it has a much greater range of Nickel in the chemical composition.
14NiCrMo13-4 steel should be welded before carburizing, and the product does not require pre-heating prior to the treatment.

Heat treatment - temperature, thermal-mechanical processing, conditions

Thermal treatment and thermo-chemical treatment of steel of 12H2N4A / 14NiCrMo13-4 grade
Softening annealing	640 - 680℃
Normalizing annealing	860 - 880℃
Cyaniding	850 - 880℃
Carburizing	870 - 900℃
Hardening (I) after carburization	845 - 875℃	in oil
Hardening (II) after carburization	780 - 800℃	in oil
Tempering	150 - 210℃	in the air or oil

Mechanical properties

- Mechanical properties

Tensile strength, Rm = ≥ 1130 MPa
Yield point, Re = ≥ 930 MPa
Hardness after softening, HB = ≤ 269
Elongation, A = ≥ 10%
Notch toughness, KU2 = ≥ 72 J
Contraction, Z = ≥ 50%

- - Physical properities

Density, ρ = ~7,83 kg/dm³
Thermal conductivity , λ_20℃ = ~33,5 W⋅m⁻¹ K⁻¹
Linear Expansion Factor, α = 11,1⋅10⁻⁶ K⁻¹
Heat capacity cp _20-100℃ = 490 J⋅kg⁻¹ K⁻¹

In the grade of 14NiCrMo13-4, 1.6657 we supply:

List of equivalents and other determinations of 12H2N4A steel:

12Ch2N4A, 12Kh2N4A, 12Х2Н4А, 655M13, EN36A, EN36B, N3CCH, 36A, 36 A, ČSN 16 420, ČSN 16420, ČSN 416420, 16NCD13, 16 NCD 13, 16NCD17, 16 NCD 17, 16 NC 12, 16NC12, 14 Ni 14, 14Ni14, 14NiCrMo13-4, 1.6657, LW 6657, 12Cr2Ni4A, A43123, A 43123, 12Cr2Ni4, AMS-S-8503, AISI E3310, E 3310, AISI 9310

12H2N4A, 14NiCrMo13-4, AISI 9310 - Case-hardening steel

14NiCrMo13-4, 1.6657, 655M13 - Case-hardening alloy steel for carburizing

14NiCrMo13-4, 1.6657, 12H2N4A - Nickel construction steel without molybdenum for aerospace carburization - characteristics

Heat treatment - temperature, thermal-mechanical processing, conditions

Mechanical properties

In the grade of 14NiCrMo13-4, 1.6657 we supply:

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