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Nuances

General engineering steels

• Steels for carburizing
• Through hardening steels
  

  A&D Grade	Specifications			Chemical Composition				Mechanical properties
  	European standard	USA	Common designation	C	Ni	Cr	Mo	Heat treatment	UTS (N/mm²)	0,2% YS (N/mm²)	A (%)
  												820	40NiCrMo18			0.40	4.50	1.50	0.50	T + F + Rv 200°C T + Rv 650°C	1950 1200	1500 950	11 14
  819AW	35NiCrMo16			0.38	4.00	1.75	0.50	T + F + Rv 200°C T + Rv 650°C	1900 1050	1500 900	10 18
  819B	36NiCrMo16			0.35	3.80	1.70	0.30	T + F + Rv 200°C T + Rv 650°C	1850 1000	1400 850	8 19
  BMV4	40CrMoV20	UNS: T20811		0.40		5.00	1.30	T + 2xRv 570°C	1850	1450	9
  CNS	35NiCr6			0.35	1.20	0.85		T + Rv 550°C T + Rv 650°C	1100 900	950 750	14.5 18
  F65	34CrMo4			0.35		1.00	0.20	T Rv 600°C T + Rv 675°C	1050 900	950 750	16.5 20
  FDMA	30NiCrMo16			0.30	3.50	1.20	0.45	T + Rv 200°C T + Rv 625°C	1750 1000	1250 900	12 19
  GH4	40CrMoV13‑9			0.40		3.00	1.00	T + Rv 200°C T + Rv 600°C	1950 1400	1450 1150	10 13
  MOCV2	42CrMo4			0.42		1.00	0.20	T + Rv 200°C T + Rv 675°C	1900 1000	1500 800	7 18
  MOC2	40CrMoV4‑6	UNS: K14675	17‑22A	0.45		1.00	0.55	T + Rv 650°C	1200	1050	13
  NC40M	41NiCrMo7‑3‑2	UNS: G43400 AISI / SAE: 4340	4340	0.40	1.80	0.80	0.25	T + Rv 600°C	1100	950	17
  V300	45SiCrMo6		45SiCrMo6	0.45		0.60	0.25	T + Rv 450°C T + Rv 600°C	1600 1150	1400 1000	10 18
  V325	50SiCrMo6			0.50		0.80	0.25	T + Rv 450°C	1800	1550	10

  A&D Grade	Specifications			Main Standards
  	European standard	USA	Common designation	AIR	AECMA	NF-EN/NF-EN-ISO/NF-A		WL	BS	AMS	ASTM		SUS	JIS
  				Standard	Standard	Symbol	Numerical	Standard	Standard	Standard	Grade	Standard	Standard	Standard
  820	40NiCrMo18
  819AW	35NiCrMo16			E35NCD16H	FE‑PL78
  819B	36NiCrMo16			35NCD16	FE‑PL76	36NiCrMo16	1.6773	1.6773
  BMV4	40CrMoV20	UNS: T20811		40CDV20 E‑40CDV20	FE‑PM13S			1.7784		6487
  CNS	35NiCr6			35NC6	FE‑PL62
  F65	34CrMo4			35CD4	FE‑PL45	34CrMo4	1.7220	1.7220 1.7224
  FDMA	30NiCrMo16			30NCD16	FE‑PL75
  GH4	40CrMoV13‑9			40CDV12	FE‑PL56, FE‑PL1507 40CrMoV12	40CrMoV13‑9	1.8523		S132, S134 S138
  MOCV2	42CrMo4					42CrMo4	1.7225
  MOC2	40CrMoV4‑6	UNS: K14675	17‑22A			40CrMoV4‑6	1.7711			6304, 6305
  NC40M	41NiCrMo7‑3‑2	UNS: G43400 AISI / SAE: 4340	4340			41NiCrMo7‑3‑2	1.6563		S149	6414 6415 6359	B23 L23	A540 A320
  V300	45SiCrMo6		45SiCrMo6	45SCD6
  V325	50SiCrMo6

  A&D Grade	Specifications			Mechanical properties
  	European standard	USA	Common designation	Heat treatment	UTS (N/mm²)	0,2% YS (N/mm²)	A (%)	KCU (J/cm²)	KV (J)	KV -40°C (J)	KV -60°C (J)	Hardness HV	Hardness HRC
  820	40NiCrMo18			T + F + Rv 200°C T + Rv 650°C	1950 1200	1500 950	11 14	60 80
  819AW	35NiCrMo16			T + F + Rv 200°C T + Rv 650°C	1900 1050	1500 900	10 18	50 110
  819B	36NiCrMo16			T + F + Rv 200°C T + Rv 650°C	1850 1000	1400 850	8 19	40 130
  BMV4	40CrMoV20	UNS: T20811		T + 2xRv 570°C	1850	1450	9	30
  CNS	35NiCr6			T + Rv 550°C T + Rv 650°C	1100 900	950 750	14.5 18	85 120
  F65	34CrMo4			T Rv 600°C T + Rv 675°C	1050 900	950 750	16.5 20	100 140
  FDMA	30NiCrMo16			T + Rv 200°C T + Rv 625°C	1750 1000	1250 900	12 19	70 140
  GH4	40CrMoV13‑9			T + Rv 200°C T + Rv 600°C	1950 1400	1450 1150	10 13	60 65
  MOCV2	42CrMo4			T + Rv 200°C T + Rv 675°C	1900 1000	1500 800	7 18	30 95
  MOC2	40CrMoV4‑6	UNS: K14675	17‑22A	T + Rv 650°C	1200	1050	13	100
  NC40M	41NiCrMo7‑3‑2	UNS: G43400 AISI / SAE: 4340	4340	T + Rv 600°C	1100	950	17	100
  V300	45SiCrMo6		45SiCrMo6	T + Rv 450°C T + Rv 600°C	1600 1150	1400 1000	10 18	30 60
  V325	50SiCrMo6			T + Rv 450°C	1800	1550	10	30

  A&D Grade	Specifications			Chemical composition
  	European standard	USA	Common designation	C	Ni	Cr	Mo	V	Si	Mn
  820	40NiCrMo18			0.40	4.50	1.50	0.50
  819AW	35NiCrMo16			0.38	4.00	1.75	0.50
  819B	36NiCrMo16			0.35	3.80	1.70	0.30
  BMV4	40CrMoV20	UNS: T20811		0.40		5.00	1.30	0.45
  CNS	35NiCr6			0.35	1.20	0.85
  F65	34CrMo4			0.35		1.00	0.20
  FDMA	30NiCrMo16			0.30	3.50	1.20	0.45
  GH4	40CrMoV13‑9			0.40		3.00	1.00	0.20
  MOCV2	42CrMo4			0.42		1.00	0.20
  MOC2	40CrMoV4‑6	UNS: K14675	17‑22A	0.45		1.00	0.55	0.30
  NC40M	41NiCrMo7‑3‑2	UNS: G43400 AISI / SAE: 4340	4340	0.40	1.80	0.80	0.25
  V300	45SiCrMo6		45SiCrMo6	0.45		0.60	0.25		1.60	0.60
  V325	50SiCrMo6			0.50		0.80	0.25		1.60	0.80

  Key to heat treatment symbols
  Solution treated	H	Annealed	R
  Thermo-mechanical treatment	TM	Quenched and tempered	T+RV
  Sub-zero treatment	F	Solution treated and aged	H+V

  
  
• Maraging steels
• Steels for nitriding
• Steels for special applications