NC310YW Steel (40SiNiCrMoV10)

NC310YW is a high strength steel used for parts subject to high mechanical and high fatigue stresses. For applications that are exposed to high contact friction, NC310YW can be carburized. Its high tempering temperature (300°C) enables carburized components to be surface coated, and it can also be used at high working temperatures (>150°C).

FOR REQUIREMENTS:	High Strength and High Fatigue through hardening steel
MELT PRACTICE:	VIM-VAR
ALT TO:	300M, Aermet 100, 310, & 340 and Maraging 250, 300, & 350
SPECIFICATIONS:	AMS6499 40SiNiCrMoV10 UNS: K54015

Benefits of NC310YW

• 10% Higher UTS than 300M
• Excellent fatigue properties compared to PH Steels
• Surface Carburizable
• Less Expensive alternative to Aermet and Maraging Steels

Typical Applications

• Transmission Shafts
• Gears
• Driveshafts/tripods (in Formula 1 cars)
• Axle Shafts

Comparison to Other Materials

	Heat Treatment	YS MPa (ksi)	UTS MPa (ksi)	A %	Z %	K1c  MPa√m (ksi√inch)
NC 310 YW (AMS 6499)	940°C (1724°F) /2h Oil -75°C (-103°F)/4h 2×300°C (572°F) /2h/air	1725 (250)	2100 (305)	7	30	45 (41) Typically 55 (50)
300 M (AMS 6419)	870°C (1598°F) /2h Oil 2×300°C (572°F) /2h/air	1586 (230)	1931 (280)	7*	25	55 (50) Typically 60 (54.6)

	NC310YW	300M	Aermet 100	Aermet 310	Maraging 250	Maraging 300	Maraging 350
UTS	311	280	285	315	254	293	342
Yield Strength	260	230	250	275	248	286	336
Elongation	9%	10%	14%	14%	11%	10%	6.20%
Fracture Toughness		65	115	65	75	70	70

Chemical Composition

C	Si	Cr	Mo	V	Ni
0.40	2.70	0.85	0.40	0.20	1.75

Stocking Sizes

1.181” – 5.906”ø (30 mm – 150 mmø)

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Datasheet