Alloy Steel Bar

Available Grades

4140 / 42CrMo Alloy Bar: Most versatile medium alloy grade, excellent quenching & tempering performance, widely used for shafts, gears and heavy mechanical structural parts.
8620 Low Alloy Carburizing Bar: Nickel-chromium alloyed low carbon grade, easy surface hardening, ideal for automotive gear, pinion and wear-resistant transmission components.
SCM415 JIS Standard Alloy Bar: Fine grain uniform texture, good machinability and impact resistance, customized for precision automation machinery parts fabrication.
9310 High Nickel Alloy Bar: Premium high-toughness grade, superior fatigue resistance, applied for high-load aerospace and heavy-duty transmission core parts.
4340 Ultra High Strength Alloy Bar: Molybdenum alloy modified grade, outstanding anti-impact performance, fit hydraulic equipment and mining heavy load structural components.

Adjustable Heat Treatable Performance: Support quenching, tempering, carburizing treatment to customize surface hardness and inner toughness for diverse working loads.
Excellent Mechanical Stability: Uniform internal metallurgical structure, low impurity content, stable mechanical performance under high pressure and cyclic load.
Strong Wear & Fatigue Resistance: Alloy element optimization improves surface abrasion resistance, extending service life of rotating and friction mechanical parts.
Good High & Low Temperature Adaptability: Resist thermal deformation at high temperature, keep toughness under low-temperature harsh working conditions.
Fine Machinability & Weldability: Controlled chemical composition balances cutting performance and welding property, lowering secondary processing difficulty.
Strict Dimensional Tolerance: Hot rolled & cold drawn dual process, smooth surface, straight bar shape, less processing allowance for finished production.

Automotive Transmission Parts: Fabricate vehicle gears, crankshafts, spline shafts and suspension parts to bear driving impact and cyclic friction load.
Heavy Engineering Machinery: Load-bearing bar parts for excavator, crane and mining equipment, adapt outdoor high-strength impact working scenarios.
Petroleum & Hydraulic Components: Oilfield tool joints, hydraulic piston rods and valve parts, stable performance for medium corrosion sealed working environment.
Aerospace & Precision Equipment: High-reliability structural bar for aircraft auxiliary parts, automated robot joint and precision bearing accessories.
Mold & Tool Fabrication: Custom tool base and mechanical fixture blank, suitable for medium-load industrial mold supporting production.
Industrial Fastener & Shaft: High-strength bolt, stud and motor shaft manufacturing, meet high clamping strength industrial assembly demands.

Reduce Component Replacement Frequency: Outstanding wear and fatigue resistance prolong spare part service life, cut clients’ equipment maintenance and replacement cost.
Lower Secondary Processing Cost: Precision size, smooth surface and stable hardness decrease cutting tool loss, improve workshop machining efficiency greatly.
Meet Customized Load Design: Multiple heat treatment options match clients’ personalized hardness and strength design for differentiated product production.
Stable Batch Consistency: Vacuum degassed smelting avoids internal crack, porosity and segregation, reduce finished part rejection rate during mass production.
Global Standard Interchangeability: Unified ASTM/DIN/JIS/EN grade standard, easy replacement for imported equipment spare parts, smooth global project procurement.

Full Global Grade Inventory: Stock complete ASTM/DIN/JIS/EN alloy steel bars, support sample order, small batch trial order and full-container bulk mixed shipment.
Professional In-house Heat Treatment Workshop: Provide customized quenching, tempering and carburizing service, finish one-stop hardening processing before delivery.
Strict Full-process Quality Inspection: Conduct chemical composition test, tensile test, ultrasonic flaw detection to eliminate internal defects for every batch.
Custom Precision Processing Capacity: Offer fixed-length cutting, surface polishing, straightening and threading service, deliver semi-finished bars ready for direct assembly.
Experienced Industrial Steel Export Team: Provide complete MTC inspection documents, support FOB/CIF/DDP global shipping, smooth customs clearance worldwide.
Cost-effective Factory Direct Supply: Direct mill supply without middle agents, flexible price, long-term exclusive discount for machinery and automotive factory clients.

Standard Export Anti-rust Package: Each bar wrapped with anti-rust paper & PE film, bundled with steel belt, loaded on fumigated wooden pallet, anti-rust, anti-scratch for long-distance sea shipping.
Custom Identification Packing: Mark grade, diameter, length, heat number and mechanical data clearly, support customer private logo and bundle marking customization.
Flexible Shipping Mode: Sea freight for bulk order; air freight for urgent customized bars; international express for small test sample delivery.

Q: What is the difference between low alloy and medium alloy steel bar?
A: Low alloy bar features better machinability and low cost for general structural parts; medium alloy bar owns higher strength and wear resistance for heavy-load mechanical components.
Q: Can you customize heat treatment hardness?
A: Yes. We customize surface hardness and core toughness per client drawing, provide official heat treatment test report for batch goods.
Q: What surface finish do you provide?A: Hot rolled black finish, cold drawn bright finish, peeling polished finish are optional, meeting different machining and assembly requirements.
Q: What payment terms support international cooperation?
We can apply for flexible payment terms.please check with our sales team.