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S45C steel heat treatment performance parameter requirement

S45C steel heat treatment performance parameter requirement

45 steel is called GB, which is called S45C in JIS; ASTM called 1045,080 M46, DIN is called C45. Domestic often called 45 steel, also called “oil steel.” In general, the present market, hot rolled C45 bars is common to see, the cold rolled C45 bars size is 1.0 ~ 4.0mm.

Liquidus temperature

About 1495 ℃, the carbon content is 0.42 ~ 0.50%.

Chemical composition

The content of carbon (C) is 0.42-0.50%, the content of Si is 0.17-0.37%, the content of Mn is 0.50-0.80%, the content of Cr is less than 0.25% and the content of Ni is less than or equal to 0.30%. , Cu content ≤ 0.25%.

Density is 7.85g / cm3

Heat treatment

Recommended heat treatment temperature: normalizing 850, hardening 840, tempering 600.

45 steel is high-quality carbon structural steel, hardness is easy to cut, which is commonly used to do templates, pins, guide posts, etc., but must to do heat treatmtent( Forever continuous hardening and tempering furnace can solve this problem).

1. The hardness will be more than HRC55 (up to HRC62) is qualified before temperature after hardening.

Practical application of the highest hardness is HRC55 (high-frequency quenching HRC58).

2. 45 steel can not use carburizing and quenching heat treatment process.

Hardened and tempered parts have good overall mechanical properties and are used in a wide range of important structural components, especially those that work under alternating loads such as connecting rods, bolts, gears and shafts. But the surface hardness is low, not wear-resistant.We can use hardening and tempering process and surface hardening process to increase the surface hardness.

This article is from YuanTuo- continuous hardening and tempering furnace  manufacturer, welcome to send us email for more details about C45 heat treatment.


Contact person: Tom Wang

Phone: 0086-13303078975(whatsapp, wechat,line)

Specialist of billet heating furnace and system in China; Glad to be your business partner in induction heating field.

Post time: 02-01-2018