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Forged Bar / Forged Tubes / Forged Tube Peripheral

Steel specification: according to NIF CR-016 (Technical Specification of Supply for forged bar and tubes) Peripheral Holes: according to NIF CR-028 (Technical Specification of Supply for peripheral bores)

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PRODUCT DETAILS

	Forgedsteelround bar
	Forged Tubes
	Forged Tubes Peripheral

Full Container Loading	Less than Container Loading

Technical Specification

DIN Standard	SAE-4145 (42CrMo4)
Other Grade	Werkstoff Nr. 1.7220 - SAE/AISI 4145
Steel Type:	Alloyed Steel
Material Allowance	Dimensions (mm): OD +5/-0, ID ±1,0, Length +10/-0
Material Allowance	Dimensions (mm): OD +5/-0, ID ±1,0, Length +10/-0
Heat Treatment	Normalized
Hardness	210 - 240 HB
Granulometry	(ASTM E112): 5 - 8 ASTM austenitic
Cylindricity	According DIN 7184 = 3,0 mm
Surface Finished	Machined (rough turned with material allowance)
Tolerances	±10% is allowed

CHEMICAL COMPOSITION

DIN	SAE-4145
C%	0.43 - 0.48
Si%	0.20 - 0.35
Mn%	0.75 - 1.00
P%	< 0.035
S%	< 0.035
Cr%	0.80 - 1.10
Mo%	0.15 - 0.25
NOTES: BARS SHALL NOT BE WELDED OR REPAIRED

Technical Requirement

Steel specification: according to NIF CR-016 (Technical Specification of Supply for forged bar and tubes)

Peripheral Holes: according to NIF CR-028 (Technical Specification of Supply for peripheral bores)

Dimensions and tolerances: according to the drawings

Documentation & Material Requirements

1. Chemical Analysis Certificate (of each charge);

2. Ultrasonic Test Certificate ASTM A-388/80;

3. Mechanical Properties Certificate;

4. Hardness Test Certificate (of each forged part);

5. Charge identification (order and item) in each forged part;

6. Grain Size Certificate (of each charge);

7. Inspection Protocol (peripheral holes for each forged tube).

Peripheral Hole Dimensional Protocol

Inspection of drilling deviations must be done by ultrasound along the length of the holes. Points A and B must be registered, where the holes are spliced, as the drilling process is done in two stages, from the face to the center of the bar.

Range of application: These forged tubes are used for making the roller on the corrugated machine.

Packaging And Shipping

The company always adheres to the business philosophy of "quality first, reputation foremost" and the business principle of "customer first, quality as the soul". We strictly follow ISO quality standards to control the entire production process, strive for excellence in every product, and do our best to provide customers with safe, reliable, high-quality, well-designed, cost-effective products and efficient and fast delivery services.

EXHIBITION

All of the company's products have passed the strict technical testing and certification of relevant national departments. With stable and reliable quality and efficient production and supply capabilities, the company has won the wide recognition and good reputation of global customers and continues to export high-quality Chinese pellet mill core component products and advanced manufacturing technology experience to overseas markets.

Exhibition

FAQ

Q: What are the common wear-resistant materials used in ring dies?

A: The mainstream materials used are high-chromium stainless steel and alloy steel forging. For processing biomass raw materials such as wood chips and straw, high wear-resistant alloy steel is preferred. Corrosion-resistant stainless steel ring dies are suitable for processing livestock, poultry and aquatic feed.

Q: Are the ring die and pressure roller skin core components of a pellet mill?

A: Both are core consumable parts in pelleting. The material is extruded and formed by the ring die hole, and the pressure roller skin presses the material to complete the pelleting operation, which directly affects the pelleting quality and the overall machine output efficiency.

Q: What are the advantages of forged rings compared to ordinary cast rings?

A: The internal metal structure of the forging is dense, without defects such as pores or sand holes, and its tensile strength, wear resistance and fatigue resistance are more outstanding, resulting in a longer service life under long-term continuous operation.

Q: What equipment is suitable for forged rings?

A: Forged rings are mostly used for ring die blanks and load-bearing ring components in large machinery. They are semi-finished products forged from ring dies and are suitable for various high-load pellet mill pressure-bearing structures.

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