1Cr17Ni2 series is a kind of martensitic stainless steel with good combination of strength and toughness. It has good corrosion resistance to oxidizing acids, most organic acids and aqueous solutions of organic salts.

Worldwide equivalents of grade 1Cr17Ni2

1Cr17Ni2/ML1Cr17Ni2X17CrNi16-2 (1.4057)431X17CrNi16-22H17N214KH17N2/20KH17N2
Chemical Composition of 1Cr17Ni2 Steel Material

Mechanical Properties of 1Cr17Ni2 Steel

Tensile strength321~495σb/MPa
Yield Strength183σ 0.2 ≥/MPa

Physical Properties of 1Cr17Ni2 Steel

Thermal expansion45-25e-6/K
Thermal conductivity04-31W/m.K
Specific heat450-460J/kg.K
Melting temperature7053-0587

1Cr17Ni2 steel processing technology

Heat treatment

冷装炉温≤800°C (热装炉温不限), 开始温度1100~1150°C,终止温度>850°C,>50°C时在砂内缓冷。

When the temperature of cold charging furnace is ≤ 800 ℃ (the temperature of hot charging furnace is unlimited), the starting temperature is 1100 ~ 1150 ℃, the ending temperature is > 850 ℃, and the temperature is > 50 ℃, it is cooled slowly in the sand.


退火温度670°C, 炉冷。

Low temperature annealing

Annealing temperature 670 ℃, furnace cooling.


退火温度 850 ~870 ℃, 油冷或空冷, 硬度≤250HBW。

High temperature annealing

Annealing temperature 850 ~ 870 ℃, oil cooling or air cooling, hardness ≤ 250hbw.


1) 淬火温度950°C~1050°C, 油冷, 回火温度 275 ~350°C, 空冷, 抗拉强度≥1100MPa、伸长率≥10% 、冲击韧度≥50J/cm2、硬度≤285HBW

2) 淬火温度950~1050°C,油淬, 回火温度280~350°C,空冷, 抗拉强度1100~1730MPa、伸长率10%~22% 、冲击韧度 25 ~50J/cm2、硬度187~286HBW.

Quenching and tempering

1) Quenching temperature 950℃ ~ 1050℃, oil cooling, tempering temperature 275 ~ 350℃, air cooling, tensile strength ≥ 1100mpa, elongation ≥ 10%, impact toughness ≥ 50J / cm2, hardness ≤ 285HBW.

2) Quenching temperature 950 ~ 1050 ℃, oil quenching, tempering temperature 280 ~ 350℃, air cooling, tensile strength 1100 ~ 1730mpa, elongation 10% ~ 22%, impact toughness 25 ~ 50J / cm2, hardness 187 ~ 286HBW.

Features and application scope:



1Cr17Ni2 steel is a martensitic stainless and acid resistant steel with high strength and hardness.

1Cr17Ni2 steel has good corrosion resistance to partially oxidizing acids and organic acid aqueous solution at a certain temperature. It is suitable for manufacturing plastic molds and transparent plastic product molds under the action of corrosive media. However, the steel has poor welding performance and is easy to produce cracks. It is not suitable to weld when manufacturing molds.

Supply of 1Cr17Ni2 steel:

Product typeProductsDimensionProcessesDeliver Status
Plates / SheetsPlates / Sheets0.08-200mm(T)*W*LForging, hot rolling and cold rollingAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel BarRound Bar, Flat Bar, Square Bar8-1200mm*LForging, hot rolling and cold rolling, CastBlack, Rough Turning, Shot Blasting,
Coil / StripSteel Coil /Steel Strip0.03-16.0x1200mmCold-Rolled & Hot-RolledAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / TubesSeamless Pipes/Tubes, Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion, Cold Drawn, WeldedAnnealed, Solution and Aging, Q+T, ACID-WASHED

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Chemical Composition

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Physical Properties

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