Steel 15KHSND

Designation

Name	The value
Designation GOST Cyrillic	15ХСНД
Designation GOST Latin	15XCHD
Transliteration	15HSND
By chemical elements	15CrСНCu

Description

15KHSND steel is used: for the production of welded steel elements and various details, which are requirements of high strength and corrosion resistance with the restriction of mass and operating at temperatures from -70 °C to +450 °C; rolled, intended for the manufacture of bridge structures normal Northern execution.

Note

Chronographically low alloy steel with copper. The degree of deoxidation — SP.
15KHSND steel provides strength class long products, strip and shaped rolled CP 325 with a thickness up to 32 mm., KP 345 in thicknesses up to 10 mm.
15KHSND steel provides strength grade sheet, universal broadband rental and roll-formed profiles KP 345 with plate thickness of 32 mm. without the use of additional hardening treatment.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, OST 5.9087-84
Classification, nomenclature and General rules	В20	GOST 19281-89
Steel pipes and fittings to them	В62	GOST 20295-85, GOST 24950-81
Sheets and strips	В23	GOST 82-70, GOST 6713-91, GOST 17066-94, GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19282-73, GOST 19903-90, TU 14-1-4632-93, TU 14-1-5120-2008
Welding and cutting metals. Soldering, riveting	В05	OST 36-58-81
Sheets and strips	В33	TU 14-1-5241-93, TU 302.02.130-91, TU 302.02.151-92, TU 14-1-4431-88
Bars and shapes	В32	TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	V	Ti	Nb
GOST 6713-91	0.12-0.18	≤0.035	≤0.035	0.4-0.7	0.6-0.9	0.4-0.7	0.3-0.6	Rest	0.2-0.4	≤0.008	≤0.08	-	-	-	-
GOST 17066-94	0.12-0.18	≤0.04	≤0.035	0.4-0.7	0.6-0.9	0.4-0.7	0.3-0.6	Rest	0.2-0.4	≤0.008	≤0.08	≤0.03	≤0.1	≤0.03	≤0.02
GOST 19282-73	0.12-0.18	≤0.04	≤0.035	0.4-0.7	0.6-0.9	0.4-0.7	0.3-0.6	Rest	0.2-0.4	≤0.008	≤0.08	≤0.05	-	≤0.03	-
TU 14-1-5120-2008	0.1-0.15	≤0.01	≤0.015	0.6-0.9	0.3-0.6	0.4-0.7	0.2-0.5	Rest	0.2-0.4	≤0.008	≤0.08	-	-	-	0.03-0.06

Fe is the basis.
According to GOST 17066-94, the mass fraction of arsenic is allowed up to 0.015%, with the mass fraction of phosphorus being not more than 0.030%.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal. In the steel, cobalt is allowed up to 0.050%.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.
According to GOST 6713-91, nitrogen content is allowed up to 0.012%. In steel, deoxidized with aluminum, the residual content of acid-soluble aluminum should be not less than 0.020%. The use of other deoxidizers is allowed. In the rental for bridge structures of the northern version, the mass fraction of sulfur should not exceed 0.030%, phosphorus - not more than 0.025%. Manufacture of electroslag remelting steel is permitted. The analysis of rolling on arsenic and nitrogen is made at the request of the consumer. In the finished category 3 rolled product, the mass fraction of carbon should be ≤ 0.18%.
According to TU 14-1-5120-2008 the chemical composition is given for high quality steel grade 15ХСНДА. A mass fraction in the finished sheet steel is allowed up to 0.012%. In agreement with the customer, the replacement of niobium with vanadium in the amount of 0,08-0,12% is allowed. In the finished rolling deviations in the chemical composition in accordance with GOST 6713. The sheets are delivered with a guarantee of weldability. Carbon equivalent of Se ≤ 0.45%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d₁₀	y, %	HB, MPa
Steel hot-rolled sheet in the delivery condition
2-3.9	-	-	≥490	-	≥17	-	-	-
5-9	-	≥350	≥500	≥21	-	-	-	-
Bars and shapes of high-strength steel in the delivery state according to the GOST 19281-89 (specified strength class)
≤32	-	≥325	≥450	≥21	-	-	-	-
≤10	-	≥345	≥480	≥21	-	-	-	-
Rolled steel. Quenching in water from 900 °C + Vacation
-	200	≥1220	≥1450	-	-	≥10	≥56	≥425
The leaves are normalized
-	-	≥370	≥620	-	-	≥20	-	-
Rolled steel. Quenching in water from 900 °C + Vacation
-	300	≥1160	≥1370	-	-	≥10	≥57	≥410
The leaves are normalized
-	-	≥370	≥590	-	-	≥15	-	-
Sheet metal in delivery condition on the other 14-1-4632-93 (samples transverse)
5-25	-	345-540	490-690	≥21	-	-	-	-
Rolled steel. Quenching in water from 900 °C + Vacation
-	400	≥1080	≥1170	-	-	≥11	≥58	≥360
The leaves are normalized
-	-	≥360	≥610	-	-	≥11	-	-
The plates and universal broadband in the state of delivery according to GOST 19282-73, TU 14-1-5241-93. Quenching + Tempering (samples transverse)
8-32	-	≥345	≥490	≥21	-	-	-	-
Rolled steel. Quenching in water from 900 °C + Vacation
-	500	≥840	≥930	-	-	≥15	≥62	≥275
The leaves are normalized
-	-	≥375	≥590	-	-	≥14	-	-
Bars and shapes supplied
≤10	-	≥345	≥490	≥21	-	-	-	-
Rolled steel. Quenching in water from 900 °C + Vacation
-	600	≥640	≥740	-	-	≥20	≥68	≥220
The leaves are normalized
-	-	≥300	≥365	-	-	≥17	-	-
Bars and shapes supplied
10-32	-	≥325	≥470	≥21	-	-	-	-
32-40	-	-	≥500	≥21	-	-	-	-
Plate, broadband (universal), shaped, flat and long products according to GOST 6713-91, THE 14-1-5120-2008 (article 15HSNDA) for steel structures (to obtain the required mechsuit allowed normalization or quenching with high vacation rental 1 category, quenching with high vacation - rental 2 categories)
33-50	-	335-440	470-670	≥19	-	-	-	-
8-32	-	345-450	490-685	≥21	-	-	-	-
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9	-	≥345	≥490	-	≥19	-	-	-
0.5-3.9	-	≥345	≥460	-	≥19	-	-	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	Welded without any restrictions. Welding methods: SMAW, ADS submerged arc and gas protection electroslag welding.
Склонность к отпускной хрупкости	Malosolone.
The temperature of forging	Start - 1180 °C, the end - 840 °C.
Flock-sensitive sensitivity	not sensitive.
Corrosion resistance	Steel malosana to brittleness, therefore welds are prone to cracking.
Machinability	In the normalized released condition when blower SB=560 MPa Kn TV.SPL.=1,4 Kn b.St.=1,12.