45CrNi Alloy Structrual Steel

Standard: GB/T 3077

Description: 45CrNiA alloy steel has excellent wear and impact resistance, making it suitable for manufacturing high-strength, high-wear and impact-resistant components. 45CrNiA alloy steel also has good toughness and forgeability, allowing it to be manufactured into ...

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45CrNiA alloy steel has excellent wear and impact resistance, making it suitable for manufacturing high-strength, high-wear and impact-resistant components. 45CrNiA alloy steel also has good toughness and forgeability, allowing it to be manufactured into highly ductile and tough parts. GB/T 45CrNiA alloy steel is widely used in the automotive, aerospace, military and other fields.

45CrNi steel is a high-quality alloy structural steel in the Chinese national standard (GB/T 3077), with the unified digital code A40452.

Conventional Dimensions:
Round bars: Diameter ranging from 10mm to 300mm.
Flat bars: Thickness from 5mm to 100mm, width from 20mm to 600mm.
Plates: Thickness from 10mm to 200mm.
Forged parts: Custom dimensions based on specific requirements.

Chemical Composition of 45CrNi Alloy Steel

The chemical composition of 45CrNi alloy steel is critical to its performance.

Element	C	Si	Mn	Cr	Ni	P	S
Content (%)	0.42-0.49	0.17-0.37	0.50-0.80	0.45-0.75	1.00-1.40	≤0.035	≤0.035

Mechanical Properties of 45CrNi Alloy Steel

The mechanical properties of 45CrNi make it suitable for demanding applications. These properties are typically measured after heat treatment processes like quenching and tempering:

Property	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
Value	≥980	≥785	≥9	≤269

Equivalent Grades of 45CrNi Alloy Steel

45CrNi alloy steel has comparable grades in international standards, which can be used as alternatives depending on regional availability:

Standard	Grade
AISI/SAE (USA)	4340
EN (Europe)	36CrNiMo4
JIS (Japan)	SNCM439

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