Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of s2 steel properties in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
S2 Tool Steel
S2 Tool Steel (Available in Bars, Plates, Flat Stock, and Custom Profiles)
s2 alloy steel is an average carbon content of 0.2% carbon structural steel, is a hardness of HRC58-62, used to manufacture high-hardness hex wrenches, screwdrivers, batch nozzle and other tools of steel, also known as S2 tool steel.
Material Composition
A low-alloy, air-hardening tool steel optimized for impact resistance and edge retention. Key chemical composition (%):
|
Element |
Content Range |
Role in Performance |
|
Carbon (C) |
0.55–0.65 |
Provides essential hardness for cutting edges and wear resistance. |
|
Manganese (Mn) |
1.00–1.30 |
Enhances hardenability and improves tensile strength. |
|
Silicon (Si) |
0.50–0.80 |
Strengthens the matrix and aids in heat resistance. |
|
Chromium (Cr) |
0.50–0.80 |
Improves corrosion resistance and dimensional stability during heat treatment. |
|
Vanadium (V) |
0.15–0.30 |
Refines grain structure, enhancing toughness and wear resistance. |
|
Tungsten (W) |
1.50–2.00 |
Boosts hardness and red hardness for high-temperature applications. |
International Equivalent Grades
|
Region |
Standard |
Grade/Steel Number |
Key Characteristics |
|
USA |
AISI/SAE J4340 |
S2 |
Widely used in hand tools and precision components for its impact resistance. |
|
ISO |
ISO 4957 |
60WCrV7 (Modified) |
Similar toughness-focused composition for industrial tooling. |
|
Japan |
JIS G4404 |
SKS7 |
Equivalent grade for high-quality hand tools and die components. |
|
China |
GB/T 1299 |
60WCrV42 |
Customized for precision instruments and automotive stamping tools. |
Key Mechanical Properties & Advantages
|
Property |
Typical Value (Heat-Treated) |
Application Benefit |
|
Hardness (HRC) |
56–60 (as-quenched) |
Retains sharp edges in cutting tools and resists deformation in high-load applications. |
|
Impact Toughness (Charpy) |
≥25 J/cm² @ 20°C |
Withstands sudden shocks and vibrations, reducing breakage in hand tools and machinery components. |
|
Wear Resistance (ASTM G65) |
High (30% superior to ordinary carbon tool steel.) |
Extends tool life in abrasive environments, ideal for machining stainless steel or aluminum. |
|
Dimensional Stability |
Low distortion (<0.05% linear change) during heat treatment |
Ensures tight tolerances for precision instruments and medical device components. |
|
Red Hardness |
Maintains 50 HRC at 300°C |
Performs reliably in moderate-temperature machining or stamping operations. |
Customization Options
Form & Size:
Bars: Round (φ6mm–150mm), square (6mm–100mm), flat stock (thickness 3mm–50mm, width 20mm–300mm).
Special Profiles: Custom-ground shapes for precision instruments or automotive molds (tolerance ±0.01mm).
Surface Finishes:
Annealed (mill finish): For easy machining (HB 180–220).
Pre-hardened (28–32 HRC): For immediate use in general tools.
Polished (Ra ≤0.8μm): For medical devices or optical components requiring smooth surfaces.
Certifications:
Mill Test Reports (MTR): Chemical composition, hardness, and ultrasonic testing (UT) results.
Third-Party Inspection: SGS, BV, or ISO 9001:2015 compliance for government-regulated industries (e.g., medical, automotive).
s3 alloy steel s2 difference
s3 alloy steel: wholesale and retail SKS3 non-deformation oil steel, imported from Japan SKS3 alloy steel cold drawing steel spot.
s2 alloy steel :40Cr is the standard steel number of GB in China, 40Cr steel is one of the most widely used steel in the machinery manufacturing industry. It has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity after tempering. Steel hardenability is good, water quenching can be quenched to 28 ~ 60mm, oil quenching can be quenched to 15 ~ 40mm. In addition to tempering treatment, this steel is also suitable for cyaniding and high-frequency quenching treatment. When the hardness is 174 ~ 229HB, the relative machinability is 60%. The steel is suitable for making medium plastic molds.
Hot Tags: s2 steel properties, China, manufacturers, suppliers, factory, MN13 Grade Manganese Plate, 1 2379 steel plate for Knife, Maraging Steel bar, 34crnimo6 harndess, 21 4N Valve Steel Rods, plastic mould steel material