16MnCr5/1.7131

16MnCr5 steel are alloyed case hardening engineering steels for parts which require core tensile strength of 800 – 1100 N/mm² and good wearing resistance. It is an engineering material typically used to manufacture piston bolts, camshafts, levers and other vehicle and mechanical engineering components. It is a low-alloy steel that is composed of a combination of elements, including carbon, manganese and chromium.

Chemical Composition

Chemical Composition %
Standard	Steel Name (Steel Number)	C	Si ≤	Mn	P ≤	S	Cr
EN 10084	16MnCr5 (1.7131)	0.14-0.19	0.4	1.00-1.30	0.025	≤ 0.035	0.80-1.10
EN 10084	16MnCrS5 (1.7139)	0.14-0.19	0.4	1.00-1.30	0.025	0.020-0.040	0.80-1.10

Mechanical Properties

1.7131 material, 16MnCr5 steel Brinell hardness

• Soft annealed: ≤ 207 HBW
• Treated to hardness: 156-207 HBW
• Treated to ferrite-pearlite structure and hardness: 140-187 HBW
• Normalized: 138-187 HBW

EN 1.7131, 16MnCr5 Tensile strength (after hardening and tempering at 200 °C)

• ≤ 16mm: Min. 1000 MPa
• 16 < Dia. ≤ 40mm: Min. 800 Mpa
• 40 < Dia. ≤ 100mm: Min. 600 Mpa

Heat Treatment Specification of 16MnCr5 (1.7131 Steel)

• End quench test Austenitizing temperature: 870℃ (30-35 minutes)
• Carburizing temperature: 880-980 ℃
• Core-hardening temperature: 860-900 ℃
• Case-hardening temperature: 780-820 ℃
• Tempering: 150 – 200 ℃ (≥ 1 hour)

Application

Steel grade 16MnCr5 is used for surface hardening when grouting, nitrocarburising, nitriding and for other types of surface chemical-thermal treatment. It is used to make shafts, axles, gears, gear wheels, bolts, levers and other transport and machine-building components.