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Quality 100crmo7: Lucefin Group

This document provides specifications for the steel alloy 100CrMo7, including its chemical composition, heat treatment processes, mechanical properties, and equivalent grades based on different standards. The steel has a carbon content between 0.93-1.05% and contains 1.65-1.95% chromium and 0.15-0.30% molybdenum. It can be hardened through quenching at 850°C followed by tempering between 150-700°C to achieve a hardness of HRC 25-66 depending on the diameter and tempering temperature. The steel is commonly used in Europe, China, Germany, and the USA.

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Paulo Zechin
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168 views1 page

Quality 100crmo7: Lucefin Group

This document provides specifications for the steel alloy 100CrMo7, including its chemical composition, heat treatment processes, mechanical properties, and equivalent grades based on different standards. The steel has a carbon content between 0.93-1.05% and contains 1.65-1.95% chromium and 0.15-0.30% molybdenum. It can be hardened through quenching at 850°C followed by tempering between 150-700°C to achieve a hardness of HRC 25-66 depending on the diameter and tempering temperature. The steel is commonly used in Europe, China, Germany, and the USA.

Uploaded by

Paulo Zechin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Quality 100CrMo7

According to standards ISO 683-17: 2001 Lucefin Group


Number 1.3537 B5
Chemical composition
C% Si% Mn% P% S% Cr% Mo% Cu% Al%
max max max max Permissible
0,93-1,05 0,15-0,35 0,25-0,45 0,025 0,015 1,65-1,95 0,15-0,30 0.30 0.050 deviations on the
± 0.03 ± 0.03 ± 0.04 + 0.005 + 0.005 ± 0.05 ± 0.03 +0.03 +0.010 product
Temperature °C
Hot forming Preheating Quenching Tempering Stress relieving Annealing must be
Annealing done after machining
1100-850 400 850 150-220 600-650 and before the final
stop in furnace oil or polymer air furnace cooling heat treatment
after 850 salt bath 500-550
Soft Isothermal +AC+C Preheating Stress relieving
annealing Annealing +AC Ann. Cold-drawn welding after welding
730 800 furnace cooling to 720 -- not recommended
air after furnace to 600 after, air AC1 start AC1 end MS Mf
(HB max 220) (HB max 217) (HB max 251) 755 785 200 -10 subcooling
Mechanical properties
Table of tempering values at room temperature for round Ø 10 mm after quenching at 850 °C in oil
HB 739 739 722 670 615 595 613 512 482 432 415 344 286 253
HRC 65 65 64 61 58 57 56 52 50 46 44.5 37 30 25
R N/mm2 -- -- 2000 2400 2430 2300 2150 1950 1770 1610 1450 1240 1000 840
Rp 0.2 N/mm2 -- -- 1800 2050 2150 2090 1960 1810 1650 1500 1350 1150 900 750
A % -- -- -- -- -- -- -- -- 3.0 4.6 6.4 9.0 12.5 16.5
C % -- -- -- -- -- -- -- -- 15 20 30 38 44 52
Tempering at °C 50 100 150 200 250 300 350 400 450 500 550 600 650 700
HRC from surface to heart for different diameters quenched at 850 °C in oil Hardening in oil on round
Veariations in hardness show the mass effect 20 mm
mm 0 5 10 15 20 25 30 35 40 45 50 °C HRC
Ø 20 66 66 65.5 800 62
Ø 30 65.5 65.5 65.5 65 820 64
Ø 40 65.5 65.5 65.5 65 65 840 65.5
Ø 50 65.5 64 62 61 60.5 60.5 850 66
Ø 60 64.5 63 58.5 54 52 51.5 51 860 66
Ø 80 62.5 58 50.5 47.5 46 45 44.5 44 43.5 880 66
Ø 100 61 56 49 46.5 45 44.5 43.5 43 42.5 42.5 42.5 900 65
EUROPE EN ITALY UNI CHINA GERMANY DIN FRANCE AFNOR U.K. B.S. RUSSIA USA AISI/SAE
100CrMo7 100CrMo7 GC18Mo 100CrMo7 100CD7 -- -- A485(3)

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