S45C Hot Rolled Forged Block Flat Bars Round Bars Carbon Steel

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Plate
• Surface Treatment: Polished
• Model NO.: Round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

Characterised by good strength and impact properties, with good machinability and reasonable
weldability in the as supplied condition.

S45C has a low through hardening capability with sections up to around 60mm only generally
recommended as suitable for through hardening and tempering. It can however be successfully
flame or induction hardened in the as supplied condition resulting in surface hardnesses of up to
Rc 54 - Rc 60 depending upon quenching medium employed, type of set up, section size etc.
Core strengths will remain as supplied.

Chemical Composition( % of grade)

C	Si	Mn	P	S	Cr	Ni	Cu
0.42 - 0.48	0.15-0.35	0.6-0.9	≤ 0.03	≤0.035	≤0.2	≤0.2	≤0.3

S45C Heat Treatment
Annealing : Heat to 800 oC - 850 oC hold until temperature is uniform throughout the section,
and cool in furnace.

Flame or Induction Hardening
Heat as quickly as possible to the austenitic temperature range (820 oC - 860 oC) and required
case depth followed by an immediate water or oil quench, depending upon hardness required,
workpiece size/shape and quenching arrangements.
Following quenching to hand warm, most components should be tempered at 150 oC - 200 oC to
remove quenching stresses in the case. This will have little effect on case hardness

S45C steel Tempering
Re heat to 400 oC - 650 oC as required, hold until temperature is uniform throughout the section,
soak for 1 hour per 25mm of section, and cool in still air.