1045 Forged Steel Shaft Carbon Steel — Factory Direct Supplier | Huaxia-Steel

1045 forged steel shafts deliver the combination of strength, toughness, and machinability that general industrial rotating equipment demands. Huaxia-Steel forges 1045 (AISI/SAE 1045, DIN C45 equivalent) shafts from ingot or continuous-cast rounds, with controlled forging ratios, in-house quench-and-temper heat treatment, and finish machining to your drawing. Diameters from 80 mm to 800 mm, lengths up to 12 meters, delivered rough-machined, pre-machined, or fully finished with ground bearing seats.

Product Overview

Forging aligns the steel’s internal grain flow along the shaft axis, giving forged 1045 superior transverse toughness and fatigue resistance compared with plain bar stock — the reason pumps, gearboxes, marine propeller shafts, and heavy machinery builders specify forging for anything above roughly 200 mm diameter. Our forging process uses open-die pressing with an upset-and-draw sequence, achieving forging ratios of 3:1 to 5:1, followed by normalized or quenched-and-tempered heat treatment and ultrasonic testing per the acceptance class you specify.

Specifications

Parameter	Standard / Range
Grade	AISI 1045 / SAE 1045 / DIN C45 / GB 45#
Chemistry	C 0.43–0.50%, Mn 0.60–0.90%, P/S ≤0.040%
Diameter Range	80 – 800 mm
Length Range	Up to 12,000 mm
Forging Ratio	≥3:1 standard, ≥4:1 on request
Delivery Condition	Normalized, or Q&T to 28–32 HRC (220–285 HB)
Tensile Strength (Q&T)	750–900 MPa typical
Yield Strength (Q&T)	≥500 MPa typical
Machining Allowance	5–12 mm on diameter (rough machined), per drawing (finished)
Test Certificate	EN 10204 3.1 / 3.2 with UT report

Tolerances (Rough-Machined vs Finished)

Feature	Rough Machined	Finish Machined + Ground
Diameter	±0.5 mm	h6–h9 per drawing
Roundness	≤0.5 mm	≤0.01 mm
Straightness	≤1 mm/m (straightened)	≤0.05 mm/m
Surface finish	Ra 6.3	Ra 0.4–0.8 on bearing seats

Manufacturing Standards

• ASTM A29/A29M — General Requirements for Bars and Carbon Steel Forgings
• ASTM A668 — Carbon and Alloy Steel Forgings for Mechanical Applications
• ASTM A266 — Carbon Steel Forgings for Pressure Vessel Components
• EN 10250-2 — Open Die Steel Forgings (C45 delivery condition +QT)
• UT acceptance per ASTM A388 or SEP 1921, Class 1–3 on request

Applications

• Centrifugal and screw pump shafts
• Gearbox input/output shafts and pinions
• Marine propeller and intermediate shafts
• Rollers, rolls, and conveyor drive shafts
• Cylinder rods and hydraulic rams (chrome-plated after grinding)
• Crusher and mining equipment shafting

Quality Assurance

Every forging receives 100% ultrasonic testing after heat treatment, with defects mapped per ASTM A388 acceptance classes and the UT report issued with the shipment. Mechanical testing is performed on prolongations from the same heat: tensile, yield, elongation, reduction of area, and hardness at defined depths (surface, 1/2 radius, core). Grain flow is verified by macro-etch on witness pieces. Magnetic particle inspection of finished surfaces detects quench or grinding cracks. Third-party inspection and witnessed testing are welcome; EN 10204 3.2 certification with TPI sign-off available for project work.

Packing and Shipping

Shafts are protected with rust-preventive oil and VCI wrap, supported on wooden cradles or steel-framed crates to prevent bending in transit, with machined faces capped. Container loading uses saddles every 1.5 m for long shafts; break-bulk or flat-rack shipping for diameters above container limits. Each crate includes the packing list, mill certificate, UT report, and dimensional inspection record.