3Cr13 Round Bar

3Cr13 Round Bar

Product Description

3Cr13 Stainless Steel Tube Standard: GB/T1220-1992, belongs to the martensitic type stainless steel. This steel has good machinability, and after heat treatment (quenching and tempering), it boasts excellent corrosion resistance, high polishing performance, strength, and wear resistance. It is suitable for manufacturing plastic molds that withstand high loads, high wear resistance, and exposure to corrosive media. The 3Cr13 material with a hardness below HRC30 after tempering treatment has good machinability and is easy to achieve good surface quality. However, when the hardness exceeds HRC30, the parts machined have good surface quality but are prone to tool wear. Therefore, after the material is received, it should first be tempered to achieve a hardness of HRC25-30, followed by cutting processing.

Chemical Composition

Carbon C: 0.26~0.35

Silicon (Si): ≤1.00

Manganese (Mn): ≤1.00

Sulfur S: ≤0.030

Phosphorus P: ≤0.035

Chromium (Cr): 12.00～14.00

Nickel (Ni): Content permitted ≤0.60%

Mechanical Properties

Tensile Strength σb (MPa): Quenched and tempered, ≥735

Condition Yield Strength σ0.2 (MPa): Quenched and tempered, ≥540

δ5 elongation (%): Quenched and tempered, ≥12

Section shrinkage rate ψ (%): Quenched and tempered, ≥40

Impact Energy Akv (J): Quenching and tempering, ≥24

Hardness: Annealed, ≤235HB; Quenched and tempered, 48~53HRC

Heat treatment process

Heat Treatment Specifications: Annealing, slow cooling at 800-900℃ or rapid cooling at about 750℃; Quenching, oil cooling at 920-980℃; Tempering, rapid cooling at 600-750℃.

Metallographic Structure: Characterized by Martensitic morphology.

Delivery Condition: Generally delivered in heat-treated condition, with the specific type of heat treatment noted in the contract; if not noted, delivered in non-heat treated condition.