France · AFNOR NF

51 CrV 4

NF EN 10132-4

Chemical composition

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
narrow strip +QT, >= 0.3 <= 3 mm		1200–1800				HV 370–550 HRC；HR 39–52 HRC
narrow strip, annealed or annealed skin passed , >= 0.3 <= 3 mm	≤550	≤700	≥13 Lo = 50 mm			HV ≤220 Hardened 1038℃；HR ≤94 Hardened 1038℃

Elastic modulus	Mean thermal expansion	Thermal conductivity	Specific heat	Resistivity	Density	Poisson's ratio
210.00

Density	Elastic modulus	Poisson's ratio	Remarks
7.72–8.00	190.00–210.00	0.27–0.30	典型属性数值，工具钢。此值不来源于标准，它是指示性指标，不能被用于设计用途。
7.85	200.00–207.00	0.27–0.30	低碳钢低合金钢的材料性能属性数值，此值不来源于标准，它是指示性指标，不能被用于设计用途。