Tool Steel Carbon Steel Alloy Bar

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Plate
• Surface Treatment: Polished
• Model NO.: Round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

Introduction:
AISI 4130 alloy steel is an exemplary medium carbon, low alloy steel that adheres to the standards set forth by ASTM A29. Notably, ASTM 4140
steel is widely recognized under the moniker of chromoly steel, or chrome moly steel, characterized by its nominal composition of
0.28-0.33% Carbon, 0.8-1.1% Chromium, and 0.15-0.25% Molybdenum. This alloy bears a resemblance to 4140 steel,
albeit with a slightly elevated carbon content (0.28-0.33%), thereby enhancing 4130 material's weldability, albeit at
the cost of its through-thickness strength. Subjected to appropriate heat treatment, this steel is highly machinable.
Annealing ASTM 4130 alloy steel imparts remarkable ductility. Typically, AISI 4130 steel is available as
round bars, most commonly in a hardened and tempered state.

AISI/SAE 4130 steel grade is a multifaceted alloy boasting excellent atmospheric corrosion resistance and
substantial strength up to approximately 315º C (600º F). It offers an impressive amalgamation of strength,
toughness, and fatigue resistance.

Chemical Composition

C	Mn	P	S	Si	Cr	Mo
0.28-0.33	0.40-0.60	0.035	0.040	0.15-0.35	0.80-1.10	0.15-0.25

AISI 4130 Steel Mechanical Properties

Properties	Metric
Tensile strength, ultimate	560 MPa
Tensile strength, yield	460 MPa
Modulus of elasticity	190-210 GPa
Bulk modulus (Typical for steel)	140 GPa
Shear modulus (Typical for steel)	80 GPa
Poissons ratio	0.27-0.30
Elongation at break (in 50 mm)	21.50%
Reduction of area	59.6
Hardness, Brinell	217
Hardness, Knoop (Converted from Brinell hardness)	240
Hardness, Rockwell B (Converted from Brinell hardness)	95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.)	17
Hardness, Vickers (Converted from Brinell hardness)	228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.)	70

Thermal Properties

Properties	Metric
Thermal conductivity (100°C)	42.7 W/mK

Forging of 4130 Alloy Steel
ASTM A29 Grade 4130 steel is optimally forged within the temperature range of 1230 to 950 º C (2250 to 1750 º F).
The lower the forging finishing temperature, the finer the resultant grain size. Should the 4130 alloy
steel be forged at an excessively low temperature, there exists a potential risk for the formation of a non-uniform structure
in specific sectors of the forged part, thus necessitating a normalizing treatment before any further heat treatment.