Oil-Tempered ASTM A229 Spring Steel

• Type: Coil
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Cold Drawn
• Shape: Bar
• Surface Treatment: Polished
• Model NO.: round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel
• Application: Die Steel Bar
• Transport Package: Standard Sea-Worthy Package or as Required
• Specification: 1-40mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

Oil-Tempered ASTM A229 Steel
ASTM A229 is a standard specification for high-strength, cold-drawn steel wire used in the production of mechanical springs and wire forms. This specification encompasses a wide range of carbon and alloy steel wire available in various sizes and shapes.

Chemical Composition:
ASTM A229 steel wire is typically manufactured from high-carbon steel or alloy steel. The chemical composition may vary based on grade and application requirements, but typical compositions include:
·Carbon (C): 0.55% - 0.85%
·Manganese (Mn): 0.60% - 1.20%
·Phosphorus (P): 0.035% max
·Sulfur (S): 0.040% max
·Silicon (Si): 0.10% - 0.30%
Additional alloying elements like chromium (Cr), vanadium (V), and nickel (Ni) may be added to enhance specific properties such as strength, toughness, and corrosion resistance.

Mechanical Properties:
Mechanical properties are specified by the manufacturer and may vary based on factors such as wire diameter and surface condition. Typical mechanical properties include:
·Tensile Strength: 2240 MPa (325 ksi) minimum
·Yield Strength: 1960 MPa (285 ksi) minimum
·Elongation: 7% minimum (for wire diameter ≤ 0.025 inches)
·Modulus of Elasticity: 205 GPa (29700 ksi) minimum

Heat Treatment:
ASTM A229 steel wire is typically supplied in the as-drawn condition, offering high tensile strength and hardness. However, it can undergo various heat treatment processes like stress relieving, annealing, or precipitation hardening to achieve specific mechanical properties and improve formability.

Surface Finish:
Surface finish may vary depending on manufacturing processes and customer requirements. Common finishes include bright, matte, or coated to enhance corrosion resistance and appearance.

Applications:
ASTM A229 steel wire finds extensive use in applications requiring high-strength, durable springs and wire forms, including:
·Automotive and transportation components
·Industrial machinery and equipment
·Aerospace and defense systems
·Consumer electronics and appliances
·Medical devices and surgical instruments
·Sporting goods and recreational equipment

Quality Control and Testing:
Manufacturers adhere to stringent quality control measures and testing protocols to ensure compliance with ASTM A229 specifications. Testing methods include tensile testing, hardness testing, chemical analysis, and dimensional inspection.