28CrS4(1)

28CrS4 EN 10084-1998, Number: 1.7036

Under EN10084-1998 standard,28CrS4 Structural steel means a specific level of strength and formability of steel. Tensile test can be formed after the interruption of the elongation said. Structural steel usually used for carrying purposes, the strength of steel in these applications is an important design criteria.28CrS4 Structural steel can be broken down as follows: alloy steel carbon steel low alloy steel heat-resistant steel and so on.

Comparison of steel grades JUS Č.41342 DIN 28CrS4 BS - GOST - AISI - UNI - NF - Chemical composition (cast analysis)

Chemical elements	C	Si max.	Mn	P max.	S	Cr
%, by mass	0,24-0,31	0,40	0,60-0,90	0,035	0,020-0,040	0,90 – 1,20
Permissible deviation	± 0,02	+ 0,03	± 0,04	+ 0,005	± 0,005	± 0,05

Hardness limits for steel

Hardness HRC at a distance from quenched end of test piece (in milimetres) of
mm		1,5	3	5	7	9	11	13	15	20	25	30	35	40	45	50
+H	max.	53	52	51	49	45	42	39	36	33	30	29	28	27	-	-
+H	min.	45	43	39	29	25	22	20	-	-	-	-	-	-	-	-
+HH	max.	53	52	51	49	45	42	39	36	33	30	29	28	27	-	-
+HH	min.	48	46	43	35	32	29	26	23	20	-	-	-	-	-	-
+HL	max.	50	49	47	42	38	35	33	30	27	24	23	22	21	-	-
+HL	min.	45	43	39	29	25	22	20	-	-	-	-	-	-	-	-

Hardness requirements for products delivered in the conditions ’’treated to improve shearabilita’’ (+S), ’’anneled to maximum hardness requirements’’ (+A), ’’treated to hardness range’’ (+TH) or ’’treated to ferrite-pearlite structure and hardness range’’ (+FP)

Brinell hardness in the condition
+S max.	+A max.	+TH		+FP
		min.	max.	min.	max.
255	217	166	217	156	207

Non-metallic inclusions Requirements for microscopic degree of purity when tested in accordance with DIN 50 602 (method K) (valid for oxidic non-metallic inclusions)

D (mm) Bars Diameter d (mm)	K Total characteristic value K (oxides) for the individual cast
140 < d 200	K 4 ≤ 50
100 < d ≤ 140	K 4 ≤ 45
70 < d ≤ 100	K 4 ≤ 40
35 < d ≤ 70	K 4 ≤ 35
17 < d ≤ 35	K 3 ≤ 40
8 < d ≤ 17	K 3 ≤ 30
d ≤ 8	K 2≤ 35

Conditions for heat treating test bars and treatment of the steels

End quenchh test Quenching, 0C	Carbunnzing temperature, 0C	Core-hardening temperature, 0C	Case-hardening temperature, 0C	Tempering, 0C
850	880 to 980	860 to 900	780 to 820	150 to 200

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