Stainless Steel Grade AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2

AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2 - is an austenitic chromium-nickel stainless steel alloy that provides excellent corrosion resistance and increased strength at elevated temperatures.

The chemical composition makes this grade of stainless steel an ideal material for use in highly aggressive environments such as petrochemical plants and offshore platforms, while maintaining sufficient flexibility for most industrial operations.

The grade has excellent corrosion resistance, increased strength at higher temperatures and excellent mechanical properties during cold working. It is an ideal material for applications requiring high levels of strength, durability and resistance to extreme temperature changes.

The alloy is not subject to hardening and is non-magnetic. Niobium is a stabilizer.

Application temperature maximum 600 °C.

Physical properties

Table No. 1: physical properties of stainless steel grade AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2
Density g/cm³	8,0
*Specific heat capacity at +20°C, J/kgK**	500
*Thermal conductivity at +20°C, W/mK**	15
*Specific electrical resistance at +20°C, μOhmm**	0,75
Magnetic properties	non-magnetic

Table No. 2: physical properties of stainless steel grade AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2
Temperature	+20°С	+100°С	+200°C	+300°С	+400°С	+500°С
Modulus of elasticity, GPa	200	194	186	179	172	165
Coefficient of linear expansion, 10^-6/°C	16,5	16,5	17,5	18,0	18,5	19,0

Application

The metal is used for fasteners, heat exchangers, coolers, tanks, pumps, pipelines and similar equipment for oil refineries, paper mills, food processing plants and chemical plants. Resistant to intercrystalline corrosion.

Heat treatment

Recommended operating parameters and heat treatment parameters for alloy AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2:

Forging: 1150 °C - 850 °C.
Rolling: 1150 °C - 850 °C.
Solution: 1030 °C - 1110 °C.

Mechanical properties

Table: mechanical properties of stainless steel grade AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2
Yield strength, min., ReH, MPa	250
Tensile strength (tensile strength), min., Rm, MPa	510 - 740
Relative elongation, min., %	Longitudinal samples	35
	Transverse samples	30
Impact work KV at 20°C, min., J	Longitudinal samples	100
	Transverse samples	60
Yield strength at 50 °C, ReH (MPa)	202
Yield strength at 100 °C, ReH (MPa)	186
Yield strength at 150 °C, ReH (MPa)	177
Yield strength at 200 °C, ReH (MPa)	167
Yield strength at 250 °C, ReH (MPa)	157
Yield strength at 300 °C, ReH (MPa)	145
Yield strength at 350 °C, ReH (MPa)	140
Yield strength at 400 °C, ReH (MPa)	135
Yield strength at 450 °C, ReH (MPa)	131
Yield strength at 500 °C, ReH (MPa)	129
Yield strength at 550 °C, ReH (MPa)	127

Elevated temperature test

Table: elevated temperature test AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2
Temperature,°C	Tensile strength R_m, MPa, min.	Yield strength, min., R_p0,2, MPa	Yield strength, min., R_p1,0, МПа
50	-	207	244
100	440	185	218
150	410	177	206
200	390	167	196
250	385	157	186
300	375	145	175
350	375	140	169
400	375	135	164
450	370	131	160
500	360	129	158
550	330	127	157

Table: chemical composition of AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2
Chemical composition of steel grade AISI 316Cb \| EN 1.4580 \| DIN X6CrNiMoNb17-12-2
C	Si	Mn	P	S	Cr	Mo	Ni	Nb	Fe
<0,08	<1,0	<2,0	<0,04	<0,015	16,5-18,5	2,0-2,5	10,5-13,5	<1,0	Other

AISI 316Cb | EN 1.4580 | DIN X6CrNiMoNb17-12-2 - stainless low-carbon chromium-nickel steel of the austenitic class. The alloy is additionally alloyed with molybdenum, manganese, silicon, niobium. Combines high strength, corrosion resistance, good impact toughness. It is used for the manufacture of high-strength parts, welded structures operating in an aggressive environment at elevated temperatures, designed for long service lives at 600 °C.