Hot rolled hardened gear steel round bar

VANFORGE supply hot-worked alloy, carbon and carbon-boron steels in a variety of compositions and sizes.

Hardenability

The relative ability of a steel to harden under heat treatment becomes apparent in the degree to which the material hardens when quenched at different cooling rates. It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape test specimen in a standardized quench. In the “end-quench” test the “depth of hardening” is the distance along the specimen from the quenched end to a given hardness.

Ordering Information

Orders for material under this specification should include the following information, in proper sequence:

1 Quantity (weight),

2 Name of material (alloy, carbon, or carbon-boron steel),

3 Cross-sectional shape,

4 Size,

5 Length,

6 Grade,

7 End-quenched hardenability (see Section 9),

8 Report of heat analysis, if desired (see Section 7),

9 Special straightness, if required,

10 ASTM designation and date of issue,

11 End use or special requirements, and

12 Leaded steel, when required.

Chemical composition

Grain Size Requirements

1 The steel shall conform to the fine austenitic grain size requirement of Specification A29/A29M.

2 Hardenability values specified in this specification are based on fine-grain steels and are not applicable to coarse-grain material. In case coarse-grain steel is desired, the hardenability

values shall be negotiated between the purchaser and the manufacturer.

End-Quench Hardenability Requirements

1 The end-quench hardenability shall conform to the requirements specified on the purchase order.

2 When agreed upon between the purchaser and manufacturer, special hardenability limits may be ordered and shall be reflected on the purchase order.

Test Methods

1 Grain Size—Test Methods E112.

2 End-Quench Hardenability—Test Method A255.

Product size range
Diameter: 40mm - 150mm
Length: on request

Production Process





Key clients

Suzhou Vanforge Metals Co., Ltd. was set up in April 1999 with a registered capital of 230 million Yuan in Zhangjiagang Bonded Area in Jiangsu Province of China. It has developed to be an important R&D and manufacture enterprise of high performance stainless steels and nickel alloys.

Vanforge is a high-tech enterprise with 70 national patents, it has its own Special Alloy Research Center, academician workstation and post doctorate innovation practice base. Vanforge has been certificated the national laboratory accreditation of ISO/IEC 17025, and ISO9001, ISO14001, OHSAS18001, API Q1, IATF16949, GB/T23331, TUV, CCS, DNV, LR, ABS.

Vanforge has the international advanced special smelting capacity, including the German ALD 6t vacuum induction furnace, 6t consumable electrode vacuum furnace, 18t drawing-ingot protective atmosphere electroslag furnace and 1t vacuum induction furnace, 3t electroslag furnace, 18t drawing-hollow ingot electroslag furnace, and 2# Purification Furnace/1# Purification Furnace/LF/AOD/VOD refining production line, 25MN/8MN fast forging machine, 450/320 rolling mill, etc.

The current annual production capacity of Vanforge is 120,000 tons, and the main products are high-grade special alloy materials, including high temperature alloy, corrosion resistant alloy, precision alloy, ultra high strength steel, special stainless steel, high-grade tool and mould steel, steam turbine blades steel, gas turbine steel, ultra-supercritical materials, etc., which are widely used in aviation, aerospace, ship, petrochemical, nuclear power, electronics, steam turbine, high-speed rail, machinery manufacturing, and other fields; besides, we can organize the research and development and production of new materials according to customer demand for new materials. Vanforge has now become a qualified supplier of domestic high-end equipment manufacturing enterprises, such as CASIC, CGN, CRRC, CFHI, Wujin Stainless, Zhejiang Jiuli Hi-Tech Metals Co., Ltd., Xinxing Ductile Iron Pipe Co., Ltd., etc.

We always adhere to the concept of quality first, integrity based, scientific and technological innovation, making progress, and wholeheartedly serving customer and devote ourselves to becoming the well-known supplier of key basic materials of world’s high-end equipment manufacturing industry.

We supply following products in the forms of wires, bars, plates

(Super) austenitic stainless steels

(Super) duplex stainless steels

(Supper) Ferritic stainless steels

Precipitation hardening stainless steels

Incoloy alloys

Inconel alloys

Monel alloys

Hastelloy alloys

As well as following steel products

Gear steels

Bearing steels

Spring steels

Drilling tool steels

Free-cutting steels

Anchor steels, mooring chain steels

Mining chain steels

Die steels, Mold steels, tool steels

Structural steels

Antiwear steels

Offshore structure steels

Petroleum storage tank steels