What type of steel is 6150?
carbon chromium low alloy steel
6150 is a carbon chromium low alloy steel melted as AOD + VAR. This alloy has excellent shock resistance and toughness in the heat treated condition. This grade also possesses excellent abrasive resistance. This alloy is commonly used in machinery parts such as shafts gears and pinions.

Product Description

Product	Steel round bar
Outside Dia(mm)	8mm-650mm
Technology	hot rolled/cold rolled/cold drawn/forged
Length	1-12m/customized
Other sections	Angle bar/Square bar/Flat bar/Flat bar
Standard	GB/T799,ASTM A29,A108,A321,A575,BS970,DIN1652,JIS G4051
Material	ASTM(1005,1006,1008,1010,1015,1020,1025,1030,1035,1040,1045, 1050,1055,1060,1065,1070,1080,1084,1016,1022)6150, 4140, 4340
	DIN(Ck10,Ck15,Ck22,Ck25,Ck30,Ck35,Ck40,Ck45,Ck50, 30Mn4,40Mn4)
	BS(040A04,095M15,045M10,080A40,045M10,080M50)
	GB(Q195, Q235,Q345)
Surface	Black painted,galvanized
Advantages	High strength, good weldability, good machining performance, good corrosion resistance

AISI 6150 steel is chromium vanadium type spring steel. It’s a similar alloy steel to 5150 steel with small, but effective, vanadium addition, to import greater hardness. AISI steel 6150 has low distortion properties and is easily heat treated. The SAE 6150 steel grade is suitable for oil hardening and tempering.

ASTM 6150 steel is usually supplied in the as rolled condition. When used in the oil hardened and tempered condition SAE 6150 spring steel combines spring characteristics with excellent resistance to both abrasion and shock. Hardened 6150 steel offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, vibration and shock.

2. AISI Steel 6150 Specification and Relevant Standards

Country	USA	BS	Japan	China
Standard	ASTM A29	EN 10083	JIS G4801	GB/T 3077
Grades	6150	1.8159/51CrV4	SUP 10	50CrVA

3. ASTM 6150 Steels & Equivalents Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Cr	V
ASTM A29	6150	0.48-0.53	0.70-0.90	0.035	0.040	0.15-0.35	0.80-1.10	≥0.15
EN 10083	1.8159 /51CrV4	0.47-0.55	0.70-1.10	0.025	0.025	≦0.40	0.90-1.20	0.10-0.25
JIS G4801	SUP 10	0.47-0.55	0.65-0.95	0.030	0.030	0.15-0.35	0.80-1.10	0.15-0.25
GB/T 3077	50CrVA	0.47-0.54	0.50-0.80	0.030	0.030	0.17-0.37	0.80-1.10	0.10-0.20

4. AISI/SAE 6150 Steel Mechanical Properties

Properties		Conditions
		T (°C)	Treatment
Density (×1000 kg/m3)	7.7-8.03	25
Poisson’s Ratio	0.27-0.30	25
Elastic Modulus (GPa)	190-210	25
Tensile Strength (Mpa)	667.4	25	annealed at 815℃
Yield Strength (Mpa)	412.3
Elongation (%)	23.0
Reduction in Area (%)	48.4
Hardness (HB)	197	25	annealed at 815℃
Impact Strength (J)	27.4	25	annealed at 815℃

5. Forging of Material AISI 6150 Steel

AISI 6150 alloy steel could be forged between 2150 and 1600ºF (1175 and 870ºC.) The alloy should be slow cooled after forging or transferred to a furnace around the ‘finishing’ temperature. Do not forge below 840°C.

Analysis:

C	CO	CR	MN	MO	NI	P	S	SI	V	W
0.48 – 0.53		0.80 – 1.10	0.70 – 0.90			0.04 Max.	0.04 Max.	0.15 – 0.30	0.15 Min.

Size Availability:
Flats • Rounds
Designations:
AISI 6150 Alloy Steel-US
AFNOR 50 CV 4-France
DIN 1.8159-Germany
UNI 50CrV 4-Italy
JIS SUP 10-Japan
SS 2230-Sweden
B.S. 735 A 50-United Kingdom
B.S. En. 47-United Kingdom
ASTM A231-US
ASTM A322-US
ASTM A331-US
ASTM A505-US
MIL SPEC MIL-S-8503-US
SAE J404-US
SAE J412-US
SAE J770-US
UNS G61500-US