41Cr4 Equivalent Materials & Metal Specifications

41Cr4/1.7035 is a chromium alloy steel that surpasses C45 in hardenability, making it the preferred choice for surface-hardened machinery components. Supplied in quenched and tempered condition, it delivers enhanced toughness, plasticity, and wear resistance. The reference standard is DIN EN ISO 683-2 (formerly EN 10083-3).

CategoryMaterials

PublishedOct 28, 2023

Read4 min read

AuthorRedstone Engineering

01Equivalent Materials
02Steel Designations
03Characteristics
04Surface Hardness
05Mechanical Properties
06Chemical Composition

Equivalent Materials

GB 3077:40Cr (China) - high wear-resistance and high-temperature strength
ASTM A29:5140 (USA) - balanced strength and ductility for high-stress applications
JIS G4104:SCr440 (Japan) - renowned for high toughness and impact resistance
BS970:530M40 (UK) - high tensile strength and good wear resistance

Steel Designations

ISO name (ISO 683-2)	ISO number (ISO 683-2)	EN 10083-3:2006 number	JIS	GB
41Cr4	-	1.7035	SCr440, SCr440H	-

ISO and JIS designation cross-reference for 41Cr4

Characteristics

41Cr4/1.7035 demonstrates impressive mechanical properties across industrial applications. The alloy showcases superior hardenability through heat treatment, outperforming alternatives like C45 steel in wear resistance. Carbonitriding treatment enriches the surface layer with carbon and nitrogen, significantly enhancing hardness and wear resistance. The material is suited to gears, shafts, and steering knuckles in medium-load, medium-speed applications.

Heat treatment methods include: quenching and tempering (refines grain structure, improving toughness and strength), normalizing (refines ferrite-pearlite grain), annealing (removes stresses, improves machinability), and surface hardening via induction or flame methods (enhances surface hardness while preserving core toughness). Initial forging temperature is 1150 C, decreasing to 850 C.

Surface Hardness

Steel name	Surface hardness HRC min.
41Cr4	53

Minimum surface hardness after surface hardening

Mechanical Properties

Steel name	Size range	Rp0.2 min. (MPa)	Rm (MPa)	A min. (%)	Zb min. (%)	Kv2 min. (J)
41Cr4	d <= 16mm, t <= 8mm	800	1000-1200	11	30	-
41Cr4	16mm < d <= 40mm, 8mm < t <= 20mm	660	900-1100	12	35	35
41Cr4	40mm < d <= 100mm, 20mm < t <= 60mm	560	800-950	14	40	35
41Cr4	100mm < d <= 160mm, 60mm < t <= 100mm	-	-	-	-	-
41Cr4	160mm < d <= 250mm, 100mm < t <= 160mm	-	-	-	-	-

Mechanical properties by size range (quenched and tempered, per EN 10083-3)

Chemical Composition

Steel name	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Cr (%)	Mo (%)	Ni (%)	Cu (%)	Others (%)
41Cr4	0.38-0.45	0.10-0.40	0.60-0.90	0.025	0.035	0.90-1.20	-	-	0.4	-

Chemical composition of 41Cr4 (wt%)

NOTE

Redstone Manufacturing does not guarantee accuracy of the information in these tables. Some metrics have been rounded, converted, or estimated. Consult a qualified engineer to confirm accuracy.

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